BCS 111 Lecture Notes - Lecture 12: Brainstem, Cochlea, White Matter
30 Jul 2018
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Auditory nerve moves signal through the auditory brainstem, up through the thalamus, and into primary auditory cortex. A1, r, rt project to different areas. More caudal areas used for spatial processing. More rostral areas used for object identification and emotional content. Motor & somatosensory homunculus the somatotopic (mapped out in relation to the body) representation of the body in the motor & somatosensory cortices. In general: start precise, get more abstract with distance. But can only fixate on one object at a time (simultanagnosia) Makes reading difficult (one letter at a time) Optic ataxia (trouble reaching & orienting hand w/ visual guidance) Delusions that part of her body was not working / had died. Had the sensation that claws were growing out of her feet. Lesions in parietal lobe close to the somatosensory representation. (the pop-psychology version is mostly bs, but ) Certain tasks show greater activation in one hemisphere over the other.
