Iv. Pavlova, FUNCTIONAL ASYMMETRY OF THE MEDIAL HYPOTHALAMUS OF RABBITS DURING AVOIDANCE, Zurnal vyssej nervnoj deatelnosti im. I.P. Pavlova, 48(3), 1998, pp. 396-404
Thresholds of avoidance reactions and changes in correlated neuronal a
ctivity in the visual and sensorimotor cortical areas were studied in
rabbits under conditions of stimulation of right (RH) and left (LK) me
dial hypothalamus. Avoidance threshold were lower during stimulation o
f the LH (112 +/- 12 mcA) than during stimulation of the RH (166 +/- 2
2 mcA). The stimulation of LH was more effective in inducing reorganiz
ation in correlated activity of neurons: only after the left stimulati
on (inducing active avoidance) the number of neuronal pairs with corre
lated activity in the left,hemisphere increased (49%) and delays up to
120 ms appeared between the discharges of visual and sensorimotor cor
tical neurons (the first one led). The obtained evidence suggests the
more important role of the LH than RH in motivation.