PSYC 2800 Chapter 2: Chapter 2 Summary brain and behavaior.docx

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mental creation of reality is based on the sensory information received and the cognitive processes. Principle 2: the details of nervous-system functioning are constantly changing, an attribute called neuroplasticity. Principle 3: many of the brains circuits are crossed. Principle 4: the central nervous system functions on multiple levels. Principle 5: the brain is both symmetrical and asymmetrical. *the human brain contains about 80 billion neurons and 100 billion glia. Neuroplasticity: the nervous systemd s potential for physical or chemical change that enhances its adaptability to environmental change and its ability to compensate for injury. Autonomic nervous system (ans): parts of the pns that regulates the functioning of internal organs and glands. Afferent: conducting towards a central nervous system structure. Efferent: conducting away from a central nervous system structure. Meninges: three layers of protective tissue- dura mater, arachnoid, and pia mater- that encase the brain and spinal cord.