A t th e e d g e o f th e s e c tio n th e r e w a s

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Unformatted text preview: h t d e n ta to th a la m ic n e r v e fib e r s . T h e a g o n iz in g p a in fe lt d o w n th e le ft le g w a s d u e to th e le s io n in th e r ig h t th a la m u s . 9 Quiz on Thalamus & Cortex D u r in g a p r a c tic a l c la s s in p a th o lo g y , a s tu d e n t w a s s h o w n a s lid e illu s tr a tin g a p a r tic u la r fo r m o f c e r e b r a l tu m o r . A t th e e d g e o f th e s e c tio n th e r e w a s a s m a ll a r e a o f th e c e r e b r a l c o r te x . T h e in s tr u c to r a s k e d th e s tu d e n t w h e th e r th e tis s u e h a d b e e n r e m o v e d fr o m a m o to r o r s e n s o r y a r e a o f th e c o r te x . W h a t is th e m a in d iffe r e n c e in s tr u c tu r e b e tw e e n th e m o to r a n d s e n s o r y a r e a s o f th e c e r e b r a l c o r te x ? The cerebral cortex is made up of six identifiable layers. In the motor cortex in the precentral gyrus, there is a lack of granular cells in the second and fourth layers, and in the somesthetic cortex in the postcentral gyrus, there is a lack of pyramida...
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