PSY333H1 Chapter Notes - Chapter 2: Parasympathetic Nervous System, Sympathetic Nervous System, Autonomic Nervous System
Document Summary
Chapter 2 the systems of the body. Regulation of the autonomic nervous system occurs via the sympathetic nervous system and the parasympathetic nervous system. Sympathetic nervous system prepares the body to respond to emergencies; strong emotions; and strenuous activity (especially stress: because it"s concerned with the mobilization and exertion of energy, it"s called a catabolic system. Brain receives afferent (sensory) impulses from the peripheral nerve endings and sends efferent (motor) impulses to the extremities and to internal organs to carry out necessary movement. Sensory impulses come from peripheral areas of the body, up the spinal cord, through hindbrain and midbrain and received and interpreted in the cerebral cortex. Motor impulses pass down the cortex to the lower portions of the brain and from there to other parts of the body: cerebral cortex has 4 lobes: frontal, parietal, temporal, occipital with its own memory storage area.
