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Lecture 10

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Steve Joordens

Lecture 10 Parietal Lobe  Perception of the body  Association cortex here seems to be involved in complex spatial functions that differ across the hemisphere  The left parietal appears to keep track of the spatial location of our body parts - proprioception o Damage often associated with poor motor movements  The right parietal appears to keep track of the spatial location of things in our external world o Damage can lead to problems of neglect and spatial integrations of parts  Left is about input from the body and knowing where the body is at all times and controlling it o Meeting place last stair is taller than rest and people trip because their body gets used to the stair height very fast  Right worries about the world or outside of the body o Damage can make people neglect half of the world, they can still see it but the body just wouldn't process it and attend to it o Neglect and don't represent that other side with damage  With parietal lobe the primary cortex is 'The Sensory Strip' and in front of it is 'The motor strip'  The Sensory Strip - Area of the brain that gets activation when something touches your body o Part that gets activated depends on the part of your body that gets touched o E.g. Pinching elbow doesn't hurt a lot because not a lot of sensory strip but with everything else like lip it hurts more because more sensory strip  Whatever body part is more useful for the task for brain activity the more sensory strip for that body part Frontal Lobe  Part of brain that takes information and comes up with plan of action and puts that plan into action  Part that does stuff and doesn't take in information  First three about input this about output  The Motor Strip (Cortex) o E.g. Your frontal lobe wants your right hand up and the left part of your brain motor cortex does something to make your right hand go up  That part of your brain commands your muscles to move o Phantom Limb Pain - Pain in part of your body that doesn't exist  If something stimulates that part of your sensory cortex, you can feel something happen on your body but it actually happens in your brain o Stimulation of motor cortex can make your body move  Epileptic Seizure - Brain including motor cortex is being short circuited and when they are unconscious on the floor, because of electrical stimuli in brain they move around because of motor cortex o In motor output, the mouth is very important especi
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