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N Ia Vasin

Publications and source records attributed to N Ia Vasin.

At least 19 recordsLinked to original sources
PubMed1990

[The neuronal reactions of the reticular nucleus of the human thalamus to verbal and sensory stimuli of differing signal strengths].

Responses of 340 single units of the n. Rt of the human thalamus to significant and insignificant verbal and sensory stimuli during the performance of voluntary motor acts recorded by microelectrodes were investigated in dyskinetic patients in the course of 46 stereotaxic operations. Two types of polymodal units with irregular continuous (A-type, "triggered verbal command" units, 183 neurons, 56% reacting) and burst rhythmic (2-5 per s.) discharges (B-type, 139 neurons, 59% reacting) have revealed reactivity to a verbal command with a specialized multicomponent pattern at functionally different stages of purposive motor acts. The analysis of principal components has shown that the extracted components of responses correlated with the functional significance of verbal or sensory signals, especially with voluntary acts of the verbal message triggering, but not with physical, somatotopic or semantic parameters of stimulation. It was suggested that the transient time-connectivity of A and B neurons at the trigger stages of purposive tasks reflected the coexistence in the Rt of two functionally different cellular subsystems participating in the transmission of significant signals during speech-provoked voluntary acts.

Acoustic Stimulation↗
PubMed1990

[The dynamic neuronal interactions in the reticular nucleus of the human thalamus to verbal stimuli of differing signal strengths].

Dynamics of neuronal interaction in 90 ensembles of the RT including units of two types (A, B) recorded by microelectrodes was analyzed during verbal and sensory stimulation and voluntary motor acts in dyskinetic patients in the course of 38 stereotaxic operations. It was shown that high transient interneuronal cooperation in A and B units were selectively related to triggering stages of a purposive act: verbal commands presentation and movement initiation and realization. Specific character of dynamics of interneuronal cooperation determined both by the type of constituent elements and functionally different stages of voluntary acts was found. It is supposed that transient interneuronal cooperation of A and B units reflects dynamic conjugation of two functionally different cellular subsystems in the Rt which are probably connected with verbal-related processing and triggering as well as with movement-related voluntary acts.

Acoustic Stimulation↗
PubMed1988

[Voluntary activity of the neck muscles in patients with spastic torticollis].

The authors investigated the characteristics of motor disorders in patients with spastic torticollis. The study involved registration of volitional tensions of the neck muscles in isometric conditions, i.e., when the patient's head was rigidly fixed with regard to the body. Using a tensometric dynamometer the following three moments of force were measured: one responsible for bending the head forward or backward; the second, for bending the head to the right or left shoulder; and the third, for turning the head round the longitudinal axis. The electrical activity of the neck muscles was recorded with the help of surface electrodes. It has been established that the development of volitional efforts by the neck muscles under isometric conditions is difficult or impossible if directed to the side where the patient's forcible turn of the head is directed.

Chronic Disease↗
PubMed1988

[The unified interdisciplinary classification of closed cranio-cerebral trauma].

The article gives an account of the classification of cranio-cerebral traumas recommended by the IIIrd All-Union Congress of Neurosurgeons. Main clinical forms of cranio-cerebral traumas are described: concussion of the brain, contusion of the brain of light, mild and critical degree, compression of the brain against the background of its contusion and without it. A uniform gradation of disturbed consciousness and criteria for the assessment of the patient's state are presented.

Brain Concussion↗
PubMed1985

[Toward a single inter-disciplinary classification of cranio-cerebral injuries].

The article presents clinical criteria of the diagnosis of concussion, contusion and compression of the brain in the acute period of a craniocerebral injury. The authors specify the major signs of a moderate and deep stun, sopor, as well as moderate, deep and coma de passe. Unified evaluations of the severity of the state of a patient with a craniocerebral injury are described.

Brain Concussion↗
PubMed1984

[Clinico-psychopathologic aspects of acute craniocerebral injuries].

Altogether 100 patients with severe craniocerebral traumas seen during the acute period in a neurotraumatological hospital were entered into a clinico-psychopathological study. The authors traced the effect of the extent of the damage, the duration and depth of the comatose state, the localization of the injury and a number of other factors, including the therapy conducted, on the formation and time-course of individual psychopathological syndromes and patients' rehabilitation.

Acute Disease↗
PubMed1979

[Effects of electric stimulation and destruction of the centrum medianum of the optic thalamus in patients with akinetic forms of parkinsonism].

Results of electrostimulation and destruction of the median centre of the thalamus in 15 patients with parkinsonism and in 7 patients with uncontrollable pain are presented. Reactions of activation and inhibition in the psychoemotional, somatic and vegetosensory spheres in response to the stimulation are described. Data on bioelectrical activity changes in the cortex of the large hemispheres are presented. Special studies of the effect of the median centre destruction on the muscular tone and tremor were carried out. In the akinetic forms of parkinsonism the effect of reactivation after the median centre destruction was found to be of little clinical importance.

Cerebral Cortex↗
PubMed1977

[Clinical picture of cranio-cerebral trauma combined with trauma to the cervical region of the spine].

On the basis of 60 observations the peculiarites of clinical manifestations of skull-brain injuries combined with trauma of the cervical vertebrae are described. It is demonstrated that in such cases the syndrome of the cerebral lesion often plays the leading part, masking the symptoms of the spinal cord injury. The disorders in circulation in the vertebral-basilar system due to the compression of the vertebral artery canal by the dislodged fragments, its thrombosis, and irritation of the periarterial sympathetic plexus are of importance in the genesis of the developing syndrome in the rombencephalic portion of the brain. In the mechanism of vestibular disorders a certain place belongs, apart from the direct traumatization of the rombencephalic portion and circulation disorders in the vertebral-basilar system, to injuries of the vestibulospinal pathways. The autonomous-visceral pathology observed in cases of cervical injuries can be attributed to the direct effect of the trauma upon the segmental innervation appratus of the heart, diaphragm, thorax.

Adolescent↗
PubMedDate not supplied

[State of the sympathetic orbito-pupillary innervation in facial pain syndromes].

In 55 patients with trigeminal pain syndromes of different genesis a study of the state of the orbit-pupillar innervation was undertaken judging by the response to sympathomimetic drugs (adrenalin and cocaine solutions) administered into the conjunctival sack. The obtained data were evaluated by way of pupillography. The disorders in sympathetic orbit-pupillary innervation were found to be independent of a prevailing lesion of any of the three peripheral branches of the trigeminal nerve. Trigeminal neuralgias develop without any disorders in the sympathetic orbit-pupillary innervation. In the presence of a neuritic component in trigeminal pains the disorders in the sympathetic orbit-pupillary innervation are noted invariably. In anaesthesia dolorosa of the face an important place in the genesis of the pain syndrome belongs to the cranial portion of the sympathetic nervous system.

Cocaine↗