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Final Exam study guide based on lecture notes[1]

Final Exam study guide based on lecture notes[1] - Slide...

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Slide Set 11 – from slide 14 (motor functions of frontal lobes) – to Slide Set 18 In terms of mapping the body, in what way are the primary motor cortex and somatosensory cortex different and similar? The motor cortex and somatosensory cortex are used for moving the body. However, the somatosensory is needed for planned movement of the body (e.g. monkey pushing peanuts). What was the name of the Canadian neurosurgeon who identified that different areas of the motor cortex direct activity in discrete regions of the body? Wilder Penfield You watched a video of a woman undergoing surgery. What impact did electrical stimulation of her brain have on her speech? Do projections from the motor cortex synapse directly with the musculature? Yes. (?) Which areas of the frontal cortex project to primary motor cortex? Dorsolateral prefrontal cortex Does the somatosensory cortex project to the primary motor cortex? Yes, sends signals after is has received sensory information from the body. The somatosensory sends signals to; orbital frontal cortex, dorsolateral prefrontal cortext, secondary and primary motor cortex. Which parts of the body have the greatest representation in the motor cortex and somatosensory cortex? The face. How does damage to different parts of the frontal cortex affect motor function? For example, damage to area 4 vs damage to area 44; or damage to area 8 versus area 6. Will the motor impairment be ipsilateral or contralateral to the hemisphere where damage occurs? It will be contralateral to the hemisphere of damage. The different areas affect different motor functions. Loss of fine movement Area 4 Speed and strength Area 4, 6, and dorsolateral Poor movement programming Premotor, dorsolateral
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(planned movement) Poor voluntary eye gaze Area 8 Poor corollary discharge Premotor, dorsolateral Broca’s aphasia Area 44 How would you test for deficits in voluntary gaze? Visual search test or the Saccade test. What is corollary discharge? Signals from the frontal lobe to the parietal and temporal cortex thats inform the sensory system for anticipated changes in the sensory world as a function of changes in location Impact of damage to Broca’s area and supplementary speech zone.
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