Lec23 - THE EYE: LAST LECTURE: SOME REVIEW, SOME NEW Fig....

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Unformatted text preview: THE EYE: LAST LECTURE: SOME REVIEW, SOME NEW Fig. 17-6, p. 560 Light Transduction Path of Light Cornea Aqueous humor Pupil Lens Vitreous humor All of the above ALLOW LIGHT TO PASS THROUGH AND ALL REFRACT IT ( EXCEPT PUPILS). Retina (photoreceptor layer) Photopigment rhodopsin splits into opsin and retinol ULTIMATELY………in the ganglian cells….Chemical gated sodium channels open Membrane Depolarization Action potential is started Optic chiasma - optic nerves partially cross (right side of the field of each eye combining and going to the lateral geniculate on the right, those from the left to the left) Medial nerve fibers of each eye in the “criss- Pathway of Nerve Impulse Photoreceptors TO Bipolar Cells to 1. Ganglian cells which have axons that are the Optic nerve then to 2 . Optic chias m which goes to the 3 . . s uperior colliculus and then to the 4 . thalamus ( Lateral Geniculate Nucleus of the Thalamus ) Final Destination: . Vis ual cortex in Occipital lobe #1 is the ganglian cells as this is thes e are where the firs t AP is generated!!!! Now, We Want the DETAILS of PHOTORECEPTION …...
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This note was uploaded on 12/08/2011 for the course AMY 2A taught by Professor Jamesivey during the Spring '06 term at Riverside Community College.

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Lec23 - THE EYE: LAST LECTURE: SOME REVIEW, SOME NEW Fig....

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