chapt13_Part2--_LectureOutlines

chapt13_Part2--_LectureOutlines - Chapter 13 Nervous System...

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1 Chapter 13 Nervous System (Part 2) An electro - - chemical system.
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2 Review Overview of the Nervous System C entral N ervous S ystem The Spinal Cord The Brain The Limbic System and Higher Mental Functions P eripheral N ervous S ystem - Somatic / Autonomic Systems Drug Therapy and Drug Abuse
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3 The Brain 2 parts? Subconscious – controls, channels Conscious – largest part . . . . . The Cerebrum. The cerebrum (or telencephalon ) is the largest portion of the human brain. Communicates with, and coordinates activities of, other parts of the brain. Divided into left and right cerebral hemispheres . Divided by longitudinal fissure.
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4 The Human Brain
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6 The Brain Gray matter (outer part) of cerebrum consists of cerebral cortex and basal nuclei . Cerebral cortex is a highly convoluted outer layer that covers the cerebral hemispheres – sensation, voluntary movement, thought processes. Basal nuclei are masses located deep within white matter. White matter (inner part) consists of long myelinated axons organized into tracts. The two hemispheres are connected by the corpus callosum .
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7 Lobes of Cerebral Hemisphere Insula –not much known about, lies beneath the surface.
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9 The Brain Diencephalon is made up of hypothalamus and thalamus , and circles the third ventricle-integrating center that helps maintain homeostasis. Cerebellum is separated from the brain stem by the fourth ventricle. 2’nd largest part, involved in muscle coordination, tone, and maintaining posture/balance. The brain stem contains the midbrain , pons , and medulla oblongata . Connects cerebrum with other brain parts; regulate breathing; reflex movements for head to respond to visual, auditory stimuli; centers for heartbeat, respiration, vasoconstriction (blood pressure) etc.
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10 Reticular Activating System (RAS) Reticular formation is a complex network of nuclei and fibers extending the length of the brain stem. involves the thalamus serves as a central relay station for sensory impulses (except smell) acts as a gatekeeper to the cerebrum . . . .
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11 R eticular A ctivating S ystem
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12 The Limbic System and Higher Mental Functions Limbic system
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This note was uploaded on 01/17/2012 for the course BIOL 103 taught by Professor Robertwest during the Spring '12 term at Lee.

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chapt13_Part2--_LectureOutlines - Chapter 13 Nervous System...

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