Chap 8: Nervous System - SC WS Flashcards
Gray matter in the spinal cord containing sensory neurons.
DORSAL HORN
Gray matter in the spinal cord containing motor neurons
VENTRAL HORN
Gray matter in the spinal cord containing sympathetic
autonomic neurons.
LATERAL HORN
Part of white matter; ascending or descending axons that are
grouped by function; nerve pathway
TRACT
Afferent nerve processes that carry action potentials to the
spinal cord.
DORSAL ROOT
Efferent nerve processes that carry action potentials away from
the spinal cord.
VENTRAL ROOT
Structures containing the cell bodies of afferent neurons.
DORSAL ROOT GANGLION
Formed by joining of dorsal and ventral roots.
SPINAL NERVE
Spinothalamic, dorsal column, and spinocerebellar pathways.
ASCENDING PATHWAYS
Direct (corticospinal) and indirect pathways.
DESCENDING PATHWAYS
Axons of these cells pass from either the anterior horn of spinal
cord gray matter or cranial nerve nuclei of the brainstem to
skeletal muscles.
LOWER MOTOR NEURONS
Axons of these cells pass from the cerebral cortex, cerebellum,
and brainstem to lower motor neurons.
UPPER MOTOR NEURONS
Efferent neurons with single axons extending from the CNS to
skeletal muscle.
POSTGANGLIONIC NEURON
Efferent system with two neurons in series extending from the
CNS to smooth muscle, cardiac muscle, and glands.
AUTONOMIC SYSTEM
First neuron in an autonomic pathway.
PREGANGLIONIC NEURON
