Analysis of Multisensory Interaction in Neurones of the Cochlear Nuclei,
ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA
Pagination or Media Count:
Study of responses of 104 units in the dorsal and posterior ventral cochlear nuclei of cats under chloralose narcosis shows that 52 did not react to external stimuli. Of the 48 responsive neurons, 45 reacted to acoustic stimuli tones and or clicks and 7 were monomodal. Of the total number of units, 38 reacted to somato-sensory stimuli, 29 to light flashes and 38 to stimuli of 2 or 3 modalities, with a focal evoked potential recorded simultaneously in the latter. Eighty percent of the responses to a to were excitatory and 20 inhibitory, while responses to clicks were 80 inhibitory and 20 excitatory. Nearly all neurons responding to light and somato-sensory stimuli reacted by firing inhibition lasting as long as the two-three phase focal evoked potential and longer. The lack of correlation between neuron inhibition period and focal evoked potential phases shows that the inhibitory synaptic influx occurs far from the neuron body.
- Anatomy and Physiology