CAS BI 325 Study Guide - Midterm Guide: Optic Chiasm, Lateral Geniculate Nucleus, Vitreous Body
13 Mar 2018
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Off-center: maximal depolarization if dark center, light surround. On-center: maximal depolarization if light center, dark surround center value trumps surround. Magnocellular/ventral: layers 1-2 (retinotopically correspond to m-type rgcs) Parvocellular/dorsal: layers 3-6 (retinotopically correspond to p-type rgcs) = bar/orientation receptive field layer iv has ocular dominance columns: monocular; so can be proline-traced layer iii has first binocular fusion. Orientation columns: change horizontally; changes are angular like pinwheel: v1 simple cells v1 complex cells v2/3, two-stream hypothesis: Chapter 11: audition (lecture 12, discussion 6. 4, 7. 1-3) Chapter 12: somatosensory (lecture 13, discussion 7. 4, 8. 1-2) Germans are small and shallow, but merkel is also slow with ruffini : whiskers/hair: important sensory receptors, innervated hair follicles, mechanosensitive ion channels: force causes opening and subsequent depolarization. Sensory axons (via dorsal root): group i (a) myelinated and fast group iv (c) unmyelinated and slow. Spinal cord nerves and dermatomes: cervical (c1-8)>thoracic (t1-12)>lumbar (l1-5)>sacral (s1-5) can the lady sing? , shingles: virus affects single dermatome.
