[The neuronal reactions of the mediodorsal thalamic nucleus to stimulation of the peripheral nerves]. / Reaktsii neironov mediodorsal'nogo iadra talamusa na razdrazhenie perifericheskikh nervov.

In anesthetized immobilised cats, stimulation of radial [correction of ulnar], sciatic and splanchnic nerves evoked responses in 91.85; 90.56 and 83.33 per cent of neurons, resp., in the associative medio-dorsal nucleus of the thalamus. A high degree of convergence (82.6%) of somatic and visceral signals was revealed, as well as the interaction between the signals by the mutually blocking type.

[Effect of stimulation of the thalamic reticular nucleus on the neuronal activity of the associative and nonspecific structures of the thalamus]. / Vliianie razdrazheniia retikuliarnogo iadra talamusa na aktivnost' neironov assotsiativnoi i nespetsificheskoi struktur talamusa.

Neuronal responses in center median, medial dorsal and posterior lateral nuclei to the stimulations of n. reticularis were studied in restrained cats. 53.7, 48.3 and 10%, resp., of the units were affected. Phasing character of "silent" neurons' EPs as well as the responses with primary or secondary inhibitory periods of spontaneously firing units, were demonstrated. A wide variety of the response latencies was revealed in the n. CM (5-33.6 msec; mean: 14.83 +/- 1.7 msec) and the n. DM (3.5-44.8 msec; mean: 18.03 +/- 2.5 msec) neurons. A significant convergence of the n. reticularis and somatovisceral inputs in the neurons of the same nuclei (52.83% and 53.5%, resp.) as well as inhibitory type of interaction between these inputs, were revealed.

[Reactions of neurons of the posterolateral nucleus of the thalamus to stimulation of the peripheral nerves]. / Reaktsii neironov zadnelateral'nogo iadra talamusa na razdrazhenie perifericheskikh nervov.

Neuronal responses of the thalamic lateral posterior nucleus to single electrical shocks applied to radial, sciatic and splanchnic nerves, were studied in anesthetized immobilized cats. Different degrees of responsiveness (69, 63 and 51 per cent) and latencies (9-120, 12-130 and 16-130 ms) were revealed.

[Neuronal organization of the somatovisceral afferent systems of the centromedian area of the thalamus]. / Neironnaia organizatsiia somato-vistseral'nykh afferentnykh sistem sredinnogo tsentra talamusa.

High responsiveness of the center median neurons to stimulation of radial, sciatic and splanchnic nerves was found in unterstrained cats. The mean latencies of the responses were 24.1 ms, 28.4 ms and 38.4 ms, resp. A considerable convergence (up to 82%) was revealed. The inhibitory type of interrelationships prevailed among the afferents under study, being more obvious during the somatic stimulations. Theoretical aspects of these and other findings are discussed from the standpoint of the thalamic unspecific level of the somato-visceral integration mechanisms.

[Study of thalamic input in the motor area of the cat cortex by means of retrograde axonal transport of horseradish peroxidase]. / Izuchenie talamicheskikh vkhodov v dvigatel'nuiu zonu kory bol'shikh polusharii mozga koshki s pomoshch'iu retrogradnogo aksonnogo transporta peroksidazy khrena.

HRP-labelled neurons were studied in different thalamic nuclei projected to anterior pericruciate motor cortex of cats. Considerable concentrations of labelled cells were found in the rostral parts of relay nuclei (VL, VPL, VPM). A local type of distribution of such neurons in the associative MD nucleus was discovered as well. The quantity of HRP-labelled units in the intralaminar nonspecific nuclei (Cl, Pc, CM) was small and they were diffusively distributed. Some aspects of heterogenic thalamic afferentation to the motor cortex are discussed.

[Change in the circadian rhythms of the ECG T-wave value in ischemic heart disease]. / Izmenenie sutochnykh ritmov velichiny zubtsa T EKG u bol'nykh ishemicheskoi bolezn'iu serdtsa.

Rhythmological study of the T wave on the ECG was conducted for 24 hours in 25 healthy individuals and 141 patients with ischemic heart disease. A daily rhythm of changes in the blood supply to the myocardium was revealed. Its maximum values were recorded during the day in healthy individuals and during the night and in the morning in sick individuals, i.e. the rhythm in patients was distorted and desynchronized. Consequently, atherosclerosis of the coronary arteries as an organic disease has an effect on the natural daily rhythm of the blood supply to the myocardium.