[Impulsation of hypothalamic and amygdalar neurons in bilateral derivations in the state of food motivation].
The character of impulsation of single neurons in the lateral hypothalamic and amygdalar central nucleus of rabbits recorded in bilateral derivations during quiet wakefulness, after 24-h food deprivation, and after satiation was studied by plotting autocorrelation histograms and by counting the mean frequency of discharges. During the transition from hunger to satiation, the character of impulsation of neurons in hypothalamus and amygdala changed in different ways: (1) a greater number of hypothalamic than amygdalar neurons changed their mean discharge frequency (85 versus 56%, respectively); (2) in hunger, the number of hypothalamic neurons with delta-frequency oscillations decreased as compared to quiet wakefulness and satiation, and in the amyglala the number of neurons with beta2-frequency oscillations increased; (3) in hunger, the number of hypothalamic neurons with bursting and periodic discharges decreased and the number of amygdalar neurons with equiprobabilistic discharges increased. During state alternation (according to the autocorrelation histograms) the strongest changes in the character of neuronal discharges took place in the left hypothalamus and left amygdala. The maximum differences in neuronal impulsation between the left and right hypothalamus were observed in the state of hunger and between the left and right amygdala, after satiation.
Pavlova
I V
IV
D000679:Amygdala / Q000502:physiology*; D000818:Animals; D004594:Electrophysiology; D005508:Food Deprivation; D007031:Hypothalamus / Q000502:physiology*; D008297:Male; D008839:Microelectrodes; D009042:Motivation; D009474:Neurons / Q000502:physiology*; D011817:Rabbits; D012527:Satiation