[Effect of stimulation of "emotiogenic" brain structures on pyramidal tract responses].
In experiments with stimulation of emotiogenic zones (lateral and medial hypothalamus, raphe nuclei), as a conditioning agent, a study was made of summary responses of the pyramidal tract to electrical stimulation of the sensorimotor cortex in immobilized and freely moving rats. The responses exhibited a positive early direct P-component (mean latency 0.8 +/- 0.3 ms) and a late synaptic N-component (mean latency 1.8 +/- 0.5). Reduction of the N-component amplitude was observed during stimulation of the lateral hypothalamus, and its enhancement during stimulation of the medial hypothalamus. Stimulation of the raphe nuclei produced variable, statistically non-significant changes. The experiments have shown that the identified pyramidal neurones tend to reciprocal reactions during stimulation of positive and negative emotiogenic structures. Inhibitory and excitatory influences of the respectively positive and negative emotiogenic structures on pyramidal neurones are due to indirect modulating actions on presynaptic structures.
D000818:Animals; D001931:Brain Mapping; D004644:Emotions / Q000502:physiology*; D007026:Hypothalamic Area, Lateral / Q000502:physiology; D007033:Hypothalamus, Middle / Q000502:physiology; D008297:Male; D009044:Motor Cortex / Q000502:physiology*; D009434:Neural Pathways / Q000502:physiology; D011712:Pyramidal Tracts / Q000502:physiology*; D011903:Raphe Nuclei / Q000502:physiology; D051381:Rats; D011930:Reaction Time / Q000502:physiology; D013003:Somatosensory Cortex / Q000502:physiology*
Vliianie stimuliatsii "émotsiogennykh" struktur mozga na otvety piramidnogo trakta.