Effect of sensory stimuli on single unit activity in the posterior hypothalamus

摘要: Abstract The effects of sciatic, acoustic and photic stimuli on 147 units in the posterior hypothalamic nucleus anesthetized cat were statistically evaluated for their influences rate pattern firing. mean spontaneous firing these is low, i.e. , 0.54 spikes/sec, with 68%, 73.5% 76.8% cells responding to photic, sciatic stimuli, respectively, various degrees facilitation or inhibition. Histograms drawn have shown both early long latency responses double triple peaks. In 105 convergence was found, more than half all three modalities. These results demonstrate, at single cell level, existence somato-sensory, visual projections hypothalamus, which may modify its autonomic functions.