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Nervous System
Somatic and Autonomic
Term | Definition |
---|---|
somatic sensory neuron | receives sensory information from skin, skeletal muscles, joints, and special senses (vision, hearing, etc.) |
somatic motor neuron | sends nerve impulses to skeletal muscle |
preganglionic autonomic motor neuron | sends nerve impulses to a ganglionic motor neuron |
ganglionic autonomic motor neuron | sends nerve impulses to smooth muscle, cardiac muscle, and glands. |
visceral sensory neuron | receives sensory information from blood vessels and smooth muscle in the viscera |
SNS | a single lower motor neuron axon extends uninterrupted from the spinal cord to one or more muscle fibers. |
ANS | -2 neuron chain to innervate muscles and glands -preganglionic and post ganglionic neuron |
preganglionic neuron | -first neuron in the ANS pathway -second neuron neuron in pathway is ganglionic neuron |
postganglionic axon | extends from its cell body to effector (target) cells |
ganglion | group of nerve cell bodies in the peripheral NS |