PSYCH261 Chapter Notes -Dorsal Root Of Spinal Nerve, White Matter, Choroid Plexus

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Document Summary

Module 4. 1: structure of the vertebrate nervous system. Peripheral nervous system: connects the brain and spinal cord to the rest of the body. Somatic nervous system: consists of axons conveying messages from sense organs to the. Sulcus: a fold or groove that separates one gyrus from another: fissure: a long, deep sulcus. If cut at a particular segment, brain loses sensation and motor control fro that segment and below. The autonomic nervous system can be split into two parts: the sympathetic and parasympathetic nervous systems. Increases breathing and heart rate, decreases digestive activity. Parasympathetic nervous system: rest and digest, nonemergency responses. Long pre- ganglionic axons extend from spinal cord to parasympathetic ganglia close to internal organs. The brain has three major divisions: the forebrain, midbrain, and hindbrain. May have sensory or motor components. Receptors and organs connect to the brain by 12 pairs of these nerves. Originates in a nucleus that integrates sensory information, regulates motor output.

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