UNIT ONE - Spinal Cord ASN
What horns contain somatic and visceral sensory nuclei?
posterior (dorsal) horns
What horns contain somatic motor neurons?
anterior (ventral) horns
A spinal nerve contains
axons of motor and sensory neurons
The ventral root of a spinal nerve contains
axons of motor neurons
The dorsal root of a spinal nerve contains
axons of sensory neurons carrying afferent information
Which of the following are true regarding spinal cord tracts? a) tracts within the spinal cord can contain both descending and ascending information b) tracts are primarily located within the gray matter of the spinal cord c) ascending tracts carry sensory information toward the brain d) descending tracts carry motor commands into the spinal cord e) tracts are mixed, containing both motor and sensory axons
c,d
In gross dissection, the filum terminale and the long ventral and dorsal roots are collectively referred to as the
cauda equina
The H shaped mass in the center of the spinal cord is dominated by
cell bodies of neurons and neuroglial cells
The anterior horns are the largest in the ________ regions
cervical and lumbar
The white matter of the spinal cord is organized into anterior, posterior, and lateral....
columns
The spinal cord ends inferiorly at the
conus medularis
The cervical enlargement... a) occurs in the proximal cervical segments C1-C2 b) is the only enlargement in the spinal cord c) contains only gray matter d) supplies nerves to the upper extremity e) all of the above
d
Every spinal cord segment is associated with a pair of ____, which contain the cell bodies of sensory neurons.
dorsal root ganglia
The gray matter of the spinal cord is organized into anterior, posterior, and lateral...
horns
What horns are found only between segments T1 and L2?
lateral horns
What horns contain visceral motor neurons?
lateral horns