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Lecture 8

Psych lecture 8 October 8th.docx

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Psychology 1000

Psych lecture 8 October 8 , 2013 • Neural disorders • Split brain • Dominant & recessive traits • Polygenetic effects • What happens if cortical areas are damaged • How do genes “work” • How is more complex behavior coded? Next Time: heritability & disorders. Scan: 117-123 Parts of the Brain The cortex is responsible for • Motor association • Somatosensory association • Visual association • Auditory association They are all next door to one another and could possibly relate to one another Association areas are responsible for: • Integrate and interpret – responsible for putting information together o If you have damage to an association area you create damage to the sense that is associated with that area Neural Disorders (when an association area is damaged) • Apraxia o Inability to perform a smooth action (each action can be done separately but not in one smooth pattern) • Agnosia o Inability to interpret sensory information (unable to put information together)  Prosopagnosia – the inability to recognize faces (able to see fine but unable to recognize the face of the person)  Happens when there is damage to the fusiform gyrus (under the brain) • Aphasia o Speech problem  Broca’s aphasia – unable to express yourself • Difficulty stringing words together • Often referred to as telegraphic speech • Problems in frontal lobe (near the premotor area - premotor cortex forms words)  Wernicke’s aphasia – receptive inabilities • Difficulty in understanding what you are saying or what they are saying • No trouble in speaking but can’t identify a set of keys • Problems in temporal lobe (near the premotor area - premotor cortex forms words) Lateralization & Split Brain Left brain is for verbal – where you would find language (reading, logical thought, language) Right brain is nonverbal (space and form perception, emotions, synthesis) Split brain – what happens when the two brain hemispheres are split from one another? - Some fibres in the brain cross from right side to left side, and some do not (ex: eyes are controlled by both sides of the brain) - If the corpus collosum is severed and the left eye is trying to see a picture, the right side of the brain will not allow the person to see it
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