NEUR30003 Lecture Notes - Lecture 18: Hair Cell, Oculomotor Nerve, Eyelid
13 Aug 2020
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Lecture 8. 1 control of gaze (sensory-motor integration) Only in fixation phase do we take in visual information. Visual system has very low temporal resolution. Saccade: movement from one fixation to another. Visual input is suppressed during a saccade. The contributions of the six pairs of extraocular muscles to eye movements. 3 pairs of muscles: set of muscles that pull horizontally lateral rectus and medial rectus, set of muscles that pull vertically superior rectus and inferior rectus, superior oblique and inferior oblique go horizontally, rolling motions. Most of vision it is conjugate eyes do the same thing. Near vision: disconjugate vision - eyes both point into midline: pupils get smaller higher resolution and better depth of field. Eye doesn"t let you fixate on a point: drift: eyes shift tiny amount across retina, tiny saccade. Micro saccades essential stable image -> fades to grey because retina loses interest (need constant change)
