Hypnosis is a psycho modeling state of a human in which different methods of suggestion are implemented most effectively. Facilities of hypnosis with its numerous phenomena enable us to study experimentally processes of programming, initiation and control of motor activity, voluntary movements, cognitive activities, emotions, prognosis of behaviour act results and reactions, and the study of physiological background of human unconscious psychic activity.
Considering sensory deprivation (SD) as the basis for the research, we have started to model similar states in hypnosis on the volunteers (students and doctors) first in lecture rooms and then in neurophysiologic laboratory.
It has been found experimentally that SD causes noticeable physiologic and morphologic (histological and histochemical) changes in nervous system without real physical and medical intervention. Duration of these changes can be varied which opened new boundaries for the use of SD in neurology and psychiatry (D. Hubel, Nobel prize winner, 1990).
The research was carried out in the following way:
1.The main aim of the research was defined: disclosure of psychophysiologic mechanisms of hypnotic catalepsy, one of the most difficult and barely studied states of consciousness.
2.The hypotheses of the research: it was assumed that hypnotic catalepsy is accompanied by complex neurophysiologic processes that cause appearance of changed state of consciousness during which the character of information processing by the brain was changing that in ints turn increased the effectiveness of suggestion.
In the state of catalepsy, against the background of definite functions of cortex in the result of redistribution of brain functional features, the stimulation (disinhibition) of subcortex, which regulates unconscious and psycho-emotional processes that in its turn cause changes in motivational components of behavior, is possible.
Catalepsy in its psychophysiologic basis is probably the reason for the body and psychic processes immobilization state in which purposeful suggestional regeneration of volitional processes becomes possible.
3.The goals of the research were set:
1)To carry out psychological testing so that to find out the suggestibility and hypnoability of objects.
2)To work out the scale for symptomatic evaluation of hypnotic catalepsy so that to objectify this process during the suggestion.
3)To carry out comparative analysis of electroencephalography methods and ways of EEG results processing and interpretation so that to objectify catalepsy and to choose the most optimal way of their evaluation.
4)To work out practical recommendations for psychophysiological diagnosis of catalepsy as the most optimal state for suggestions in hypnosis.
5)To justify the differentiation of hypnotic catalepsy from its possible simulation.
4.The subjects of the research were healthy volunteers who were suggested the state of catalepsy in hypnosis. Simultaneously, the electroencephalographic biorhythms which characterize this special functional state were registered.
5.The object of the research was the phenomenon of hypnotic catalepsy and its psychophysiological mechanism.
I.Psychophysiological study of volunteered subjects was held in two stages.
During stage one the clinical and psychological examination of subjects was carried out, including their testing on suggestibility and hypnoability. Then the hypnotic effect was performed with the aim of catalepsy modeling.
Psychophysiological examination of subjects was performed. We gathered neurologic and system analysis. Neurologic examination was applied with the aim of detection of possible symptoms of central and peripheral nervous systems breakdown, autonomic disorders (pulse, pressure, etc.). Only health individuals were admitted to the participation in the research.
During the pre-experimental period all subjects were prepared to hypnotization. Anamnestic data was gathered with peculiarities of personality, temperature, thinking, and intellect.
We carried out interviews in order to find out mental state, especially character, adequacy of self-concept and the level of awareness about this method of psychotherapy. We provided subjects with additional information in order to give them adequate concept of hypnosis and to eliminate apprehension. Moreover, we organized a talk with the demonstration of hypnotic effects. Wish and possibility was identified among volunteers to take part in the experiment. The aims and goals of the research were explained.
Hypnotic testing was performed through the impact on different sensory systems in accordance with foreign and domestic methods. In order to increase efficacy of hypnosis the method of “momentary” hypnosis with the phenomenon of kinesthetic deprivation was applied. For detection of hypnoability specially developed scale for symptomatic evaluation of catalepsy was used.
During the second stage of the research the chronometry of reaching and being in the state of hypnosis was carried out. Simultaneously, the EEG recording of biorhythms in hypnosis during different functional states was made. Physiological conditions of organism (background and motor test) were defined with which differentiation from catalepsy was done. The EEG correlates of catalepsy were identified. When comparing average individual parameters with genital groups’ data, the groups distinguished in the level of hypnoability were defined. Number calculations of interhemispheric interaction of brain in the state of catalepsy were done. Probable brain structures that participate in catalepsy phenomenon were marked out. Hypnotic catalepsy related psychophysiological correlates were sorted out. After the complex analyzed of the obtained parameters the hypnoability criteria were defined.
We have examined unprepared volunteers (who earlier were not exposed to hypnosis), aged from 16 to 48 years old, males and females, right handed who were doctors and students of medical and psychological professions.
The research was carried out in accordance with the program that had been viewed and approved by the Commission on Bioethics of the National Center of Disabled People Rehabilitation under the Ministry of Labour and Social Security of the Population of the Republic of Uzbekistan with observance of main bioethical norms. Written consent about volunteer participation in the research was get from every subject.
In order to exclude circadian periodicity of subjects all studies were carried out at particular time – from 4 p.m. to 6 p.m.
Acting according to the plan shown above we proceeded to the research itself.
Preliminary testing of volunteers hasn’t revealed any psychic disorders of pathological reactions; neurological status was normal, subjects behaved adequately and participated in the experiment actively. Meanwhile, hypnotic catalepsy of various levels was observed virtually in all subjects. Clinical picture of hypnosis was documented photographically. After the subjects were withdrawn from hypnosis, the survey was made about the feelings they experienced and about their evaluation of prolonged stay in hypnosis.
Physiological diagnosis in medicine is a compound part of medical diagnosis which is connected with the study of the role of psychological factors in ethnology, pathogenesis, treatment and prevention of diseases.
The psycho-diagnostic talks were carried out with the aim of retrieving information about personality and other characteristics of subjects on the basis of selfaccount about the special features of their biography, subjective emotional experiences, and particularity of their behavior in specific situations.
We have established personal contacts for the purpose of motivation formation in subjects for the further instrumental observation.
The main goal of each subject’s observation was the assessment of psychological state and personal peculiarities:
1.Personal features (character, temperament, aptitudes, individual style, self assessment, self regulation, direction, impulsion, activity, estrangement, indifference, etc.).
2.Certain psychic functions (sensation, perception, attention, memory, and thinking).
3.Self-regulation (targeting, volitional self-regulation, and realization of intentions).
4.Commutability depending on presence of adjustive behavior, falsity, and simulation.
5.General evaluation of neurodynamics (general haste in thinking, motor activity, and speech).
6.Quick-wittedness which is revealed during instruction.
7.Attitude to accomplishment of experimental tasks (diligence or carelessness, focus on success, interest or indifference to the results).
8.Emotional state (that is displayed in depressed or good mood). We evaluated peculiarities of speech which are connected with emotional state of a subject.
9.Special attention we paid to the study of motor functions (pose, mimicry, pantomimicry, and subtle hands motor function) due to our initial aim was the investigation of cataleptic reaction of kinesthetic system of subjects in hypnosis.
We kept in mind that the mimicry of subjects significantly characterizes psychic manifestations. Amimic conditions are common for depression. Hypermimic conditions are common for hysterical individuals. Paramimic conditions are common for dissociation between content of emotional experience and mimic manifestations. Kratcher describes pantomimicry as the “chorea like” motility of hands. Theatre like demonstrational motility is typical for procedural states.
Quantitative analysis of the data which was obtained from the psychological scaling (in form of points) and from experiment timing (timekeeping) was registered.
Psychological anamnesis of life was revealed through talks on following topics:
- Illnesses that subjects had and reactions on them.
- Professional direction, labour and academic work and satisfaction with them.
- Development of family and intimate relations.
- Relations to microsocial surrounding beyond the family.
- The most painful invents in life (psychic traumas) and reactions on them.
- Pernicious habits.
Considering professional and moral and ethical indications, when choosing volunteers we observed the following generally accepted contraindications to hypnotherapy:
- Keen interest to hypnosis on behalf of a patient.
- Evident intoxication, high temperature, and unconsciousness.
- Depersonalization, hallucinations, paranoid and amentive syndromes.
- Provoking of hysterics by hypnosis.
- Fear of hypnosis on the side of a patient.
- Negative attitude to hypnosis.
Methods for suggestibility and hypnoability detection.
For the purpose of greater objectivity we joined foreign and Russian scaled for the assessment of suggestibility:
- Subject is in upright position, doctor stands behind his or her back and patients’ head thrown back and lies on hypnologist’s hand. Fall backwards is imitated.
- The same position as described above but the doctor is in front the subject and the fall forwards is imitated.
- Hands are crossed in front and over the head; test on release.
- Tree empty tubes; test on smell (benzine, ammonia spirit, water).
- Test on ball swaying with wooden magnet.
- Method of Astakhov: determination of pupils’ reaction on light and convergences: when pressing on the superciliary arches the subject is asked to open his eyes while it is suggested impossible to do.
- Ulnar phenomenon of Berekhterev: irritation of ulnar nerve – the feeling of “current flow through the little finger”; prolonged symptom of suggestibility (eyelids closed).
For the purpose of suggestibility study we used a numerical method of suggestibility detection by Barber T.X. which is common for western countries.
Barber’s scale of suggestibility includes 8 testing disorders: direct motor disorders of suggestion (lifting and lowering of a hand), “ban” or immobilizing test disorders (crossed hands, body immobilization or speech inhibition) and cognitive disorders (“post-hypnotic” reaction, “hallucination” of thirst, selective amnesia). In our research body and hands immobilization was combined in subjects.
Each subject was tested individually. Before the study of suggestibility the non-hypnotic context of the procedure was explained. Test suggestions were applied in the sitting position with eyes closed in the form of “direct” suggestion (base line) without any additional motivational or figurative instructions. For the accomplishment of every test suggestion one point was given (according to subjective calculation) that did not misrepresent the scale.
Estimation of the results was made according to objective registration by the experimenter of the behavioral reaction on test suggestions. The subjective estimation of the experienced reaction was registered from the oral report from a subject. A typical registered subjective question was, “When I was saying that your hand was heavy and was lowering down, did you really feel its heaviness and lowered it down or did you just want to oblige the experimenter?” Test suggestion passage was assessed only if the real subjective feeling that was suggested by the experimenter was present. For the passing of each test suggestion one point was given.
According to Forel A., Platonov K.I., and Rozhnov V.E., when defining the depth of hypnosis we used commonly accepted in world practice symptoms for hypnologic testing:
- State of superior eyelids mobility.
- Skin temperature and pain sensitivity.
- Presence of swallowing movements.
- Presence of cough, sneezing, sighs, and perception of side sounds.
- Body and extremities movement.
- Presence of catalepsy.
- Positive test on lethargy.
- Vegetative reactions (sweating, colour of skin, pulse, breathing, blood pressure).
- Speech of hypnotized person.
- Reaction on suggestion of emotions, illusions, and hallucinations.
We apply simple kinesthetic test for the detection of depth of hypnosis. We take a finger, not telling anything to a tested person, and lift his or her hand and release it abruptly. The results of this test may be as follows:
- the lifted hand will harden and then will take its place slowly: the subject “doesn’t sleep”;
- the lifted hand maintains the given position: catalepsy;
- the lifted hand falls down weak-willed – hypotaxity.
The study of hypnoability and reactions on hypnotic procedures was held according to the commonly used scales for hypnotic perceptiveness – Stanford (SHHS:A) and Harvard (HGSHS:A) scales, – where one of the main evaluated parameters was immobilizing phenomenon of eyelids, arm, and body catalepsy.
The study was held in standing and sitting positions including standard hypnotic induction with the following hypnotic suggestion.
We used the most perfect in our opinion, and modified classification scale of Katkov E.S. that consists of tree stages and nine degrees and includes important criteria of akinesia and catalepsy which allowed to characterize hypnoability more broadly.
The main idea of Katkov’s scale modification was in the use of three gradations of catalepsy – stable catalepsy, cataleptoid and cataleptiforic states, and in core complete description of every of these states and their accompanying hypnotic phenomena (analgesia, amnesia, eye symptom, appearing reflexes). The degree of hypnotic catalepsy intensity was defined by clinical and psychological symptomatology, manual examination, chronometry, subjective perception of time and surrounding space, post hypnotic amnesia, and levels of deprivation that was observed during the exposure to signals of different modality. All participants were devided into three groups: low-hypnoability (NG), middle-hypnoability (SG) and high-hypnoability (VG).
When analyzing the scales mentioned above and trying to follow general principles of hypnotic scaling, we have eliminated several, in our opinion, subjective criteria of hypnosis evaluation and created our own scale of hypnotic catalepsy on the basis of the hypnotic immobility factor.
During the process of the scale development, we have set up several questions to which our scale should give answers:
1.Which of the nervous-somatic systems can be easier tracked by hypnotic symptomatology?
2.How the level of hypnoability can be tracked through the kinesthetic system?
3.Which statistical symptomatology can define the level of hypnosis depth?
In connection with the physiological peculiarity of hypnotic phenomena, there are any unhypnotic people, though there are superficial (subtle) forms of hypnosis and catalepsy can exist in every hypnotic phase and level.
The Scale of Symptomatic evaluation of hypnotic catalepsy
First degree. Light cataleptoid state: drowsiness, blinking, eyes closing can be voluntary, speech inhibition, overall passiveness, and light muscle weakness (hypodynamia). Short-term catalepsy may be observed. Voluntary movements are preserved. Person being hypnotized can hear, understand, analyze everything that happens around him of her, can withdraw hypnosis independently. There are no signs of amnesia.
Second degree. Middle catatleptiformic state: evident hypodynamia (lifted hand falls abruptly), eyes catalepsy (it’s impossible to open eyes), absence of muscle resistance, no voluntary movements, lose of associated movements. Person being hypnotized cannot independently withdraw hypnosis. Swallowing movement, blinking, and voluntary movements are absent. Face muscles are relaxed (mimic of a sleeping person). Breathing is even, calm and deep (number of respiratory movements in a minute is reduced). Pulse is rare and rhythmic. Person being hypnotized can hear badly, receiving only loud shrilly sounds. There is a good repeal. Hypnologists’ words are well heard and remembered. Amnesia is not complete or is absent at all. Catalepsy is spontaneous or suggested.
Third degree. Deep catalepsy, somnambulism or lethargy.
Somnambulistic type. Hypnotized person can walk and make complex movements while not being awake, sleep in standing or sitting position with eyes being opened. Often, spontaneous catalepsy appears. Amnesia is complete or partial. Anesthesia and analgesia are spontaneous or suggested. Decrease or absence of sensory perception of the external alien stimuli (derivational phenomena, contact is only with the hypnotist), complete release and complete subjection. Suggestion of different dreams and illusions is possible. Suggestion of hallucinations (positive and negative) may be of olfactory, tactile, visually, acoustic and kinesthetic types. Application of post-hypnotic suggestions is necessary.
Lethargic type: increasing floppiness, body bends in an arch, head falls on chest, hypnotized person can fall from the chain on which he sits, full-blown adynamy. Person is unable to make any voluntary movements; rigid catalepsy (phenomenon of “tooth gear”); general decrease of reflexes, from hypostasia to analgesia; partial amnesia (person remembers all what happens in hypnosis but does not react on it). Fixation of suggested hallucinations is constant. There are some difficulties in carrying out posthypnotic suggestions.
Methodology of catalepsy modeling. Taking into consideration all existing classical methods of hypnotizing and some of the methods of Erickson hypnosis, we have tried to use muscular vascular (proprioceptive) senses of subjects as much as possible and to put aside verbalization of the process.
Classical hypnosis is usually implements by verbal suggestion in the following positions:
- In recumbency with visual concentration on shining object.
- In recumbency with the bridge of nose-directed eye sight.
- In recumbency with the rotation of a shining object in front of the patient’s eyes.
- In recumbency using metronome (10-25 min).
- In recumbency with using counting from 1 to 10.
- Suggestion to a patient of the sound of falling water.
- Standing behind patient’s back and crying out “Sleep!” at the time of his or her fall.
- Standing face to face, focusing the eye sight; head is thrown back, a command “Sleep!” with shrill voice.
- In recumbency, making “passes” with hands in front of the patients’ face (15-20 min)
- In recumbency, performing massage of patient’s face, had or hands.
Our hypnotization consisted in patient’s teaching to abstracting form the surroundings, maximal ignorance of influence from surroundings, relaxation with closed eyes and concentration of attention on lower extremities for the provision of steady position (standing or sitting) in uncomfortable pose (photo).
The subject’s position attainable after preliminary preparation promoted his or her concentration on the support point and allowed to apply kinesthetical method of inducible balance loss - “momentary hypnosis” – with further reaching of catalepsy. Then holding patient’s wrist joint (by Erickson’s method) and making the voluntary movements of both hands, we modeled the subject’s body position “palm”. In order to deepen the existing hypnotic state we used harsh palm claps by Sharko method (photo). We performed sudden noise nuisance on a person in catalepsy, with in certain rhythm and duration “relieves a stress” and, judging by the eyelashes reflex, it has adaptive-deprivation influence on the perception of weaker sound stimulus.
Photo of a steady position standing in uncomfortable pose and photo of sound influence (Sharko) on a subject
The degree of hypnotic catalepsy expression was defined clinically by the time of its reaching, subjective perception of time and surrounding space, post-hypnotic amnesia and deprivation effects observed in different irritation modality, particularly by the analgesia (photo).
The subject’s reaction on and adaptation to the new position was revealed. Relying on the information assessment during the actual catalepsy state, we have also performed the manual examination of upper extremities and neck’s muscular tonus with the evaluation of “wax” rigidity, followed up visually time and frequency of their staying in the given position, revealed symptoms of “tooth gear” and the peculiarities of the fingers position (photo).
Differentiation of hypnotic catalepsy form so called cataleptoid and cataleptiformic states was based on the evaluation of photographically documented clinical picture and wall known and steady factors.
Catalepsy’s chronometry. We have chronometrically registered time of every subject’s draw into catalepsy and the time of steady staying in it.
Chronometry indicators were simultaneously analyzed with the degree of catalepsy stability (high-stable, middle-stable and low-stable); with the level of reaction to the pain stimulation; with the reaction on the command “Open your eyes!”; with visual reactions and accommodation reflex during photo and acoustic stimulation; with the subject’s reaction on the experimenter’s attempt to attract attention by gestures (photo); and finally with the assessment of subject’s perception of surrounding on behalf of the experimenter. All these indications allowed us later to divide all subjectd into tree groups.
II.Elecrtophysiological methods of the research.
From the point of view of neurophysiology the following goal was set: to objectify through the EEG parameters the truth of hypnotic catalepsy as the controlled volitional process in artificially created immobilized pose with lack of volitional movements.
Will is the ability of a person to perform premeditated actions independently which are aimed to the fulfillment of the wish of conscious regulation of personal activity and direction of personal behaviour. So called self-acting motions that are performed by a person without involvement of conscious should not be considered as volitional actions. Self-acting motions help individual to perform volitional actions better.
Volitional actions are done with the help of actions of skeletal muscular system. When the skeletal muscular system is blocked, will is blocked too. Human can suppress own actions and even abandon some of them.
One of the main features in hypnosis is the process of akinesia which in the condition of developed catalepsy defines subject’s voluntary refusal from independent actions and inability to change body position. This important fact correlates with the concept of possibility to influence volitional processes in state of controlled akinesia and by these means rise the efficacy of suggestion. That is why when studying EEG parameters of brain rhythms in catalepsy we examine brain processes that are responsible for bulesis.
In this way we have differentiated hypnosis-modeled akinesia from possible variants of simulation. Comparison of motor and cataleptic functional test allows us to differentiate distinctions of externally similar independent and cataleptic retention of body movements.
Electroencephalography. EEG examination was carried out with the help of 8-channel electroencephalograph “Neuron-Specter-3” using compute programs “Excel”, “IBM Pentium III”. Placement of active electrodes was made in accordance with generally accepted international system (10/20). EEG was registered with the use of standard chlorine-silver electrodes with padding saturated with physiologic saline and attached to subject’s head with rubber helmet. The registration was noted from four monopolar leads (frontal, central, temporal, and occipital) of both hemispheres. Indifferent electrodes were situated on earlaps of corresponding sides. Interelectrode resistance did not exceed 10 kilohm.
During the EEG examination a subject was in sitting position in the arm chair or in standing position in a darken room with partial acoustic isolation. Registration started after 10-15 minutes of adaptation to lightening in the state of relaxed wakefulness after standard hypnotic induction.
Software of EEG allowed registering brain activity with the writing of 14 function tests that were carried out in a series of seven (with tree-minute breaks between series) and fed into computer program beforehand; the second series of tests was carried our during hypnosis:
A.First stage of the examination:
1) Background test (BT) (relaxed wakefulness with closed eyes);
3) Motor test (MT) (free perception of upper extremities);
4) Acoustic stimulation with three frequency range (3-FR);
5) Photostimulation (3-FR);
6) Tactile test (superficial pricking of left forearm);
7) Opened eyes.
B.During Second stage of the examination in order to register EEG the following tests were applied:
1) Background (relaxed wakefulness with closed eyes);
3) Catalepsy modeling;
a) Acoustic stimulation (3-FR);
b) Photostimulation (3-FR);
c) Analgesia test (injection of disposable needle into left forearm);
4) Opened eyes.
Pain stimulation of the left forearm was performed with abacterial disposable needle. Appropriate generators of flashes and acoustic clicks were used for photo and acoustic stimulation. Formulated electric signals with frequency 3, 5, 10 and 20 Hz were feed thought the standard commercial computer encephalograph “Neuron-Specter-3” into a neon bulb situated in 30 centimeters from the subject or into the headset causing appearance of monochrome flashes of light or acoustic clicks. It is reasonable to state that the mentioning of different modalities of irritation in the present work is connected with only with their use for control of catalepsy depth indication that is why results of their impact were not studied.
Duration of EEG registration in every test was 30 sec.
For every EEG lead of left and right hemispheres the total power, amplitude-frequency characteristics, and frequency spectrum index over the range 0.5 to 32 Hz and its separate parts (main EEG rhythms) over the range δ- (0,5 to 4 Hz), θ- (4 to 8 Hz), α-(8 to12 Hz), β-1 - (14 to18 Hz), β - 2- (18 to 32 Hz) were defined.
Therefore, EEG examination consisted of two stages:
1) The EEG indicators were examined in the state of relaxed wakefulness. Seven test mentioned earlier were studied with special attention to motor and tactile tests. 2) EEG indicators were studied in the state of hypnotic catalepsy and visual, acoustic and pain EEG modality (analgesia) that enabled researches to objectify level of these systems deprivation in catalepsy.
Registration of brain electric activity was performed in accordance with the set goal: to differentiate cataleptic test (CT) with its kinesthetic deprivation impact from the externally similar to it mechanic test and acoustic record. Other applied tests (analgesia, amnesia, visual and acoustic anesthesia) allowed to confirm deprivation state of the subject that appears spontaneously (without ay external impact) during catalepsy. The EEG analysis of hypnotic deprivation in motor and akinesthetic phenomena.
Methods of EEG analysis. In all groups health subjects frontal, central, temporal, and occipital leads were analyzed. The dynamics of the current EEG spectrum was controlled by the registration tape on computer monitor. Later the analysis of absolute capacity, amplitude, and index which form EEG spectrum in frequency ranges of left and right hemispheres was made. During the analysis we used of each EEG functional test three epochs of 6 sec. with the following features:
1. Record parameters:
1) analog-to-binary converter (ADC) capacity – 12 bits;
2) frequency of quantization – 256 bits;
3) EEG range – 2000 mV.
1) 1)EEG channel – 5 mV/m ;
2) 2)Scan rate – 30 mm/sec.;
3) 3)Skewness indication threshold – 15%;
4) 4)Interval – 0.
Compressive frequency analysis of EEG was performed automatically with the help of Fourier translation algorithm in the MS DOS 5.0. Software of the electroencephalograph included standard list of all function tests.
EEG indicators of catalepsy later were compared with the background recording and motor test parameters in all leads and frequency rates rhythms. The obtained information was taken into account in the process of division of subjects into groups according to evidence of kinesthetic response in catalepsy related to average EEG indicators in groups during their comparison with clinical picture dynamics.
Detection of inequality of estimated EEG parameters in left and right hemispheres in the state of catalepsy encouraged us to provide additional special evaluation of interhemispheres functional asymmetry in electric activity of brain.
Interhemispheric asymmetry coefficient (IHAC) of every parameter from the assessing rhythms was also estimated according to the following formula:
IHAC = (d-s)/(d+s) x 100,
where d and s are the average value of estimating parameters in right and left hemispheres. Calculations of IHAC (%) demonstrates difference in rhythmic activity between two hemispheres.
Observations were carried out in order to estimate IHAC dynamics of all registered parameters and EEG frequency ranges in tree function test that were chosen for comparison (FP, MP and catalepsy). Interhemispheric differences of three estimates parameters (capacity, amplitude, and index) for high-frequency rhythms were compared with the same parameters for low-frequency rhythms.
Interhemispheric asymmetry was particularly vivid in spectral capacity of rhythms. That is why in every IHAC test we tracked evidence of capacity for high-frequency rhythms and low-frequency rhythms; change of hemispheric dominance or the noticeable increase of coefficient value during the transition from any control state to catalepsy; hemispheric evidence of IHAC values of rhythms capacity for important for catalepsy range.
Estimation of IHAC parameters of EEG-will, especially of spectral capacity, permits to demonstrate the dominance of particular range’s rhythmic activity in catalepsy and hemispheric orientation of its dominance. Evaluation of predominance of spectral capacity of bioelectric activity and of rhythms ranged specially in catalepsy with the help of IHA can be used as an important diagnostic criterion of the present research.
For the better perception of the study, charts and diagrams were created in accordance with comparison of three function tests (background – motor test – catalepsy) by four parameters (capacity – amplitude – index – frequency), five frequencies (δ-, θ-, α-, β-1, β-2) and in left and right hemispheres.
Separately we developed the table of frequencies that are common for catalepsy with the perspective of its use in the adjustment of work of “Device of impact on sensory systems” that allows to study brain in the state of sensory deprivation (the State Patent of the Republic of Uzbekistan on the invention was acquired from June 13, 2006, № FAP 00271).
The processing of the data we got experimentally was dome by computer with the use of variation statistics methods. For statistical estimation of obtained values the Student criteria was used. Inside each group the evaluation of reliability of parameters changes during comparison of states was held with the help of Student paired test (the hypnoses of differentiation of average value M form zero was checked). Findings with p≤ 0.05 were considered reliably different. Static handling of the results was performed by personal computer with the use of «Microsoft Excel» program.