BIO 203 Lecture Notes - Lecture 8: White Matter, Spinal Nerve, Limbic System

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14 Mar 2019
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The thinking conscious part of the brain. Accounts for 83% of total brain weight. Separated into two hemispheres by the longitudinal fissure. Each hemisphere receives sensory information from and directs movements of the opposite side of the body. Each hemisphere has a thin outer layer called the cerebral cortex. Includes neuroglial cells, nerve cell bodies, and unmyelinated axons. Allows for communication between various areas of the brain, and between the brain and spinal cord. Band of white matter that connects the two cerebral hemispheres. The brain contains sensory, motor and association areas. The primary somatosensory area receives sensory information from. Primary motor area controls the skeletal muscles. Communicate with the sensory area, motor areas and other parts of the brain to analyze and act on sensory input. Prefrontal cortex enables us to reason and think. Serves as the relay station of the brain for all sensory information except. Also direct activity, cortical arousal, and memory.