[Laterality of food handling movements in rats]. / Lateralizatsiia pishchedobyvatel'nykh dvizhenii u krys.

Lateralization of motor food skills has been investigated on 77 adult white rats. The predominance for the left anterior extremity while carrying out food was found in 53.5% of rats, the right extremity--in 36.4% of rats. 10.3% of rats belonged to ambidexters. Prevalence of using left extremity was peculiar to the females as against the male ones. Three generations of left-handed rats obtained by crossing have been followed. Rats making use of the left extremity to take out food predominated in the second and third generates.

[Comparative physiologic study of the responses of cerebellar cortex neurons to stimulation of the vagus nerve]. / Sravnitel'no-fiziologicheskoe issledovanie reaktsii neironov kory mozzhechka na razdrazhenie bluzhdaiushchego nerva.

The cerebellar cortex neuronal responses (of Purkinje cells--PC, and of unidentified neurons UN) to vagus stimulation in anesthetized pigeons, rats and monkeys were actualized as spikes or as complex discharges in PC. Tonic neuronal responses were mainly excitatory. All the PC and the majority of UN were polymodal. Differences in the line: birds--mammals, started with an increase of responsiveness, particularly on account of mossy fibers input. A shortening of neuronal responses latency was observed. In monkeys only, a lengthening of inhibitory pauses and a variability of afterdischarges were found. The significance of cerebellum in interoceptive information processing seems to increase in phylogenesis.

[Influence of destruction of the lateral reticular nucleus and nuclei of the inferior olive in cats on electrical responses of the cerebellar cortex evoked by stimulation of the vagus nerve]. / Vliianie povrezhdeniia lateral'nogo retikuliarnogo iadra i iader nizhnei olivy koshki na élektricheskie reaktsii kory mozzhechka, vyzvannye razdrazheniem bluzhdaiushchego nerva.

The role of the lateral reticular nucleus and inferior olive in production of the cerebellar cortex evoked potentials to stimulation of n. vagus was studied on 28 cats under chloralose-nembutal narcosis. After electrolytical destruction of the lateral reticular nucleus prolongation of the latency and a decrease in the evoked potential amplitude were observed, especially ipsilaterally. After bilateral destruction the potentials could be depressed completely. A conclusion is made that the lateral reticular nucleus provides a relay to to the cerebellar cortex of interoceptive vagal impulses. Appearance of predominantly simple discharges of the Purkinje cells responses to vagal stimulation is considered as an additional evidence for such a role of the lateral reticular nucleus. After damaging the inferior olive the evoked potentials arose with unchanged latency but reduced in the amplitude. Significance of the inferior olive as an intensity regulatory for the interoceptive impulse flow to the cerebellum is discussed.

[Background [corrected] activity and evoked responses of pigeon cerebellar cortex neurons to stimulation of the vagus nerve and nerves of the extremities]. / Fonovaia aktivnost' i vyzvannye reaktsii neironov kory mozzhechka golubei na razdrazheniia bluzhdaiushchego nerva i nervov konechnostei

Background activity and evoked responses of cortical cerebellar neurons to electrical stimulation of n. vagus and limb nerves were investigated in decerebrated pigeons. The neuronal responses were of tha same type independing of the type of stimulation. The phasic and tonic responses were chiefly of an excitatory type. The phasic responses were short (10-20 ms) and long-latent (up to 80 ms). The latter were predominant. The neuronal responses to n. vagus stimulation as compared with responses to limb nerves stimulation were observed in a smaller number of neurons and revealed longer latent periods and lower ability to rhythmic reproduction. They could not be produced through the climbing fibres.