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Chap 13 part 2

Across
_________Tracts carry sensory information up
Each spinal nerve is __________ from a dorsal root & a ventral root
Efferent- Carry signals from CNS to muscles & glands -Somatic or visceral
_______ in a given tract have similar origin, destination, and function
Crossing of the midline that occurs in many tracts so that brain senses and controls contralateral side of body
(Dorsal) contains the somas of sensory neurons -Rootlets enter posterior horn of cord
Formed from roots arising from L2 to Co1
When the origin and destination of a tract are on opposite sides of the body
Nerve fibers of peripheral nervous system are surrounded by _____________ forming neurilemma & myelin sheath around the axon
Loose connective tissue external to neurilemma
(Dorsal) carries sensory input into spinal cord via sensory axons
Down
Afferent- Carry signals from sensory receptors to the CNS -Somatic or visceral -General or special
Layers of overlapping squamous cells that wrap fascicles(bundles of nerve fibers)
Cluster of neuron cell bodies outside the CNS -Enveloped in an endoneurium continuous with that of the nerve
(Posterior) associated with spinal nerves -Contain cell bodies of sensory Neurons
A cord-like organ composed of numerous nerve fibers (axons) bound together by connective tissue
___________ contain both afferent(sensory) & efferent(motor) fibers
Spinal cord communicates with the rest of the body by way of _____________
Consists of both afferent & efferent fibers
____________ tracts carry motor information down
Dense irregular connective tissue that wraps entire nerve