PHAR 100 Chapter Notes - Chapter 2: Central Nervous System, Central Nervous System Depression, Motor Coordination

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Section 01: physiological and pharmacological aspects of the central nervous system. Nervous system is specialized to recognize, process, integrate, and react to stimuli in the environment. Recognize: identify changes in the internal or external environment. Process and integrate: perceive the changes in the environment. React: produce response or an action to the changes in the environment. It consists of two divisions: the central nervous system (cns) and peripheral nervous systems (pns). Cns is composed of the brain and spinal cord: brain. Pns is composed of all nervous system tissues outside the cns. Forebrain: cerebral cortex (cerebrum): the largest part of the brain and is very rich in nerve cells. The overall functions of the cerebral cortex are: sensory and motor coordination, mental processes, intelligence, memory, vision, judgement, thought, speech, emotions, and consciousness. The cerebral cortex can be stimulated (excited) or depressed (inhibited) by drugs: thalamus: a relay center from which impulses are transmitted to the cerebral cortex.

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