NU 545 Unit 2 Evaluation with Comprehensive solutions
Review the anatomy of the brain. Which portion is responsible for keeping you awake, controlling thought, speech, emotions and behavior, maintaining balance and posture? - ANSWER Broca Area in the inferior frontal lobe (Brodmann areas 44, 45) is an important center for speech and language processing. This area, rostral to the inferior edge of the premotor area (Brodmann area 6) o the inferior frontal gyrus, is usually most important in the left hemisphere. Injury to this area results in difficulty forming or inability to for words (expressive aphasia or dysphasia). Know the function of the arachnoid villi. - ANSWER The arachnoid villi protrude from the arachnoid space, through the dura mater, and lie within the blood flow of the venous sinuses. The villi function as one-way valves directing CSF outflow into the blood but preventing blood flow into the subarachnoid space. Thus CSF is formed from the blood and, after circulating throughout the CNS, it returns to the blood
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