Introduction to Psychology Class 9: Neuroscience 2 Myers: June 26, ’06
Evolution of the Brain Reptilian Paleomammalian Neomammalian
The Cerebral Cortex
Frontal (Forehead to top) Motor Cortex Parietal (Top to rear) Sensory Cortex Occipital (Back) Visual Cortex Temporal (Above ears) Auditory Cortex
Motor/Sensory Cortex Contra-lateral Inverted “homunculus” Unequal representation
Language Areas Broca’s Area - Expression - Motor aphasia Wernicke’s Area - Comprehension - Sensory aphasia LEFT HEMISPHERE FILM: THE MIND: MODULE 8
Aphasias Motor (telegraphic speech): "Yes... ah... Monday... er... Dad and Peter H... (his own name), and Dad.... er... hospital... and ah... Wednesday... Wednesday, nine o'clock... and oh... Thursday... ten o'clock, ah doctors... two... an' doctors... and er... teeth... yah.“ Sensory (word salad): “ I called my mother on the television and did not understand the door. It was too breakfast, but they came from far to near. My mother is not too old for me to be young. Word salad”
Brain Plasticity The brain’s capacity for modification of functioning Shown by re-organization of pre- wiring Examples: Removal of hemisphere, blindfolding study FILM: THE BRAIN - DVD 1 - MODULE 10
Split-Brains Epilepsy and the corpus callosum Hemispheric specialization - Left hemisphere Logical, sequential, words/numbers, verbal/controls speech - Right hemisphere Intuitive, expressive, shapes/music/faces, non-verbal FILM: SCIENTIFIC AMERICAN - DVD 1 - SEGMENT 7