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Spinal Nerves
SA (exteroceptive)
sensitive to discriminative (fine) touch, nondiscriminative (crude or poorly localized) touch, pain and temperature
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Spinal Nerves
SA (proprioceptive)
sensitive to stimuli from muscles, tendons, joints
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Spinal Nerves
VA (interoceptive)
sensitive to nociceptive stimuli from viscera
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Neurotransmitters for SA and VA spinal nerves?
glutamate, substance P, CGRP
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Spinal Nerves
SE
motor neurons, innervate skeletal muscle and muscle spindles
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Spinal Nerves
VE
sympathetic (T1-L2) and parasympathetic (S2-S4) preganglionic nerve fibers, innervate smooth muscle and glands through a postganglionic nerve fiber
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Neurotransmitter for SE and VE spinal nerves?
acetylcholine
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Ascending tracts of spinal cord?
- gracile fasciculus
- cuneate fasciculus
- anterolateral system
- posterior spinocerebellar tract
- anterior spinocerebellar tract
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Descending tacts of the spinal cord?
- lateral corticospinal tract
- rubrospinal tract
- reticulospinal tracts
- vestibulospinal tract
- medial longitudinal fasciculus
- anterior corticospinal tract
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Major ascending pathways of the medulla?
- posterior column-medial lemniscal system
- anterolateral system
- trigeminal nuclei of trigeminal systems
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Major descending pathway of medulla?
corticospinal system
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