note 05 - visual and motor systems

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13 Feb 2011
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Lec 5 visual system anatomy retina divided into two portions from middle. Temporal portion: retina away from the nose optic nerve --> optic chiasm --> optic tract (nerves in cns) Nerves from temporal portion run to ipsilateral cortex while nerves from nasal portion go across to contralateral cortex. Object from right visual filed will "hit" nasal portion of right eye and temporal portion of. Left eye, then info of the object will reach to left visual cortex. Associational visual cortex: recognize objects faces problems of visual info transmission optic nerve damage-- Nomocular blindness: damage of one eye, lose vision from that eye. Bitemporal hemianopia: damage of optic chiasm (nerves from nasal), lose two lateral visual field primary cortex damage (info receiving problems)-- Partial occipital cortex damage of one side causes blindness on opposite visual field. Macular sparing: complete damage of one side cortex causes blindness on opposite visual field except center spot associational cortex damage (higher order problems)--

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