Neuronal activity in prepositus nucleus correlated with eye movement in the alert cat.

摘要: 1. In nine alert chronically prepared cats the activity of 177 neurons was recorded in prepositus nucleus during either spontaneous eye movement or that induced by natural vestibular and optokinetic stimulation. 2. 116 cells, position and/or velocity precisely unequivocally encoded whatever origin movement. These cells were separated into different populations according to variable directionality neuronal response. The firing rates remaining 61 loosely related movements because a variety discharge patterns observed identical movements. latter case, some other unmeasured (e.g., neck visual) suggested be frequency. 3. Discharge rate changed before eyes began move reached new steady level fixation following saccade particular direction orbit. ondirection horizontal for 59% neurons, vertical 17%, oblique 24%. 4. Regardless their preferred direction, 19% closely proportional position. range sensitivity from 1.1 7.5 spikes X s-1/deg. Weak responses occasionally slow phase nystagmus including saccades. This class exhibited very regular interspike interval given fixation. Since mainly encoded, these called neurons. 5. Other showed both saccades Their over same as above also coded nystagmus. Depending on weighting between proportionality constants, classified position-velocity (48%) velocity-position (33%) groups. 6. distribution led conclusion plays role spatial integration. predominance may significant site underlying genesis