01:830:310 Lecture Notes - Lecture 19: Pyramidal Tracts, Motor Cortex, Motor Skill
11 Apr 2014
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Document Summary
Motor cortex decides what it wants to do (flow chart) Biggest one: lateral has most of motor control, controls arms and legs. Decussates in the medulla mostly (not exclusively. Motor disorders either by cortical injuries or subcortical injuries: big motor disorders are usually subcortical. Loose bits of motor skill depending on which area is disturbed. Corollary discharge knowing when you are moving relative to your surroundings, make the world shift : cortices get copied, if we are moving, we know that the world will shift. Movement selection we generate words in response to something: react to what we see external stimuli, conveying something to someone else internal stimuli. Broca"s area a speech zone: words based on external stimuli, action words. Damage here people have problem with verbs: deals with grammar of the sentence. Suppplementary area of primary motor cortex: has to do with word finding, internal stimuli, mutism - occurs when there is damage here.
