PHGY 209 Lecture Notes - Lecture 8: Semicircular Canals, Cranial Nerves, Hair Cell
13 Dec 2017
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Document Summary
The little pink areas in the diagram shows where the transduction process occurs. It is mediated by hair cells in the same way as the auditory system (mechanically gated) The muscles that control where the eyes go are directly connected to the output of the vestibular system. It maintains the image you see stable as you move around. You can jump and move, and the image is always stable (compare with a camera). The vestibular system sends signals to the eyes to rotate it and move it as your head rotates and moves. Another automatic reflex in the visual system is the accommodation to images that are close or far, and the dilation of pupils in darker rooms. This reflex is there even if you"re blind, because it does not require any visual input. You can generate this without moving your head. Used in clinical cases looking for bleeding within the brain.
