NUR 0012 Lecture 31Ch. 12 The Central Nervous System Continued: The cerebrumOutline of Last LectureI. Ch. 12 the central nervous systemA. 3 major brain divisionsB. CNS and PNS develop from in-folding of surface ectoderm in early embryoC. The confines of the skull are the driving force of the shape of the human brainD. 4 ventricles deep inside brainE. The cerebrumOutline of Current LectureI. Ch. 12 the central nervous system cont.: the cerebrumA. CerebrumB. LobesC. Motor areasD. Sensory and association areasCurrent LectureI. Ch. 12 the central nervous system cont.: the cerebrum A. Generalizations1. Brain size related to body size: larger brains don’t necessarily mean smarter2. Basal nuclei: gray matter deep inside cerebrum3. White matter: myelinated axons (axons form tracts in CNS)4. Gyri: numerous folds which increase surface area5. Sulci: grooves between gyriB. Lobes: lie under bones of same name separated by major sulciThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.a. Frontal b. Parietalc. Temporald. Occipitale. Insula C. Motor areas: primarily frontal lobesa. Primary motor area: on precentral gyri of frontal lobesb. Pyramidal neuronsc. Motor homunculusd. Premotor cortex: learned motor skills of a repetitive or patterned naturee. Broca’s area: complex movements involved in speechf. Frontal eye field: extrinsic eye musclesD. Sensory and association areasa. Primary somatosensory cortex: on postcentral gyrusb. Primary association cortex: integrates sensory input to produce understandingc. Primary visual cortex: largest of all cortical sensory areas1) Visual association area: uses past visual experiences to interpret visualstimulid. Primary auditory cortex: relay info about pitch, rhythm, loudness1) Auditory association area: Wernicke’s area part of this area, interpretsperception of sound stimulus as speech, music,
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