The oculomotor system

First you tell them what your gonna tell them

The purposes of eye movements

Saccades move the fovea to a new position

Smooth pursuit matches eye velocity to target velocity

The vestibuloocular reflex drives the eyes in the opposite direction of head movement – but the vestibular signal habituates, and is supplemented by vision – the optokinetic response

6 Muscles move the eyes

The obliques are counterintuitive

Vertical movements are made by combination of obliques and vertical rectus muscles, each of which has a torsional and a vertical component which varies with the horizontal position of the eye in the orbit.

3 Cranial Nerves Control the Eye

Left fourth nerve palsy

Eye muscle nuclei

Oculomotor neurons describe eye position and velocity.

The transformation from muscle activation to gaze

Horizontal saccades are generated in the pons and medulla

Neurons involved in the generation of a saccade

Generating the horizontal gaze signal

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To reiterate

Vertical movements and vergence are organized in the midbrain

Internuclear ophthalmoplegia

Supranuclear control of saccades

Humans look at where they attend

Supranuclear control of saccades

Supranuclear Control of Saccades

The effect of lesions

The Antisaccade Task

Antisaccades

Smooth pursuit matches eye velocity to target velocity

Supranuclear control of pursuit: pursuit matches eye velocity to target velocity

Smooth pursuit

Clinical deficits of smooth pursuit

Oh no, what do I really have to know about this stuff, he panicked