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22 terms

Nervous system ~ Spinal Cord (CNS)

Vocab from the Get Body Smart page found here: http://www.getbodysmart.com/ap/nervoussystem/cns/spinalcord/segments/tutorial.html
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The spinal cord is made up of ~ segments
spinal nerves
Each segment of the spinal cord gives rise to one pair of ~
white matter
The outer zone of the spinal cord is referred to as ~
myelinated axons
The white matter contains many ~
gray matter
The inner zone of the spinal cord is referred to as ~
dorsal median sulcus
The shallower groove that runs along the back surface of the spinal cord is referred to as the ~
ventral fissure
The deeper groove that runs along the front surface of the spinal cord is referred to as the ~
dorsal horns
The extension of the gray matter that projects towards the back of the spinal cord are the ~
ventral horns
The extension of the gray matter that projects towards the front of the spinal cord are the ~
gray commisure
The connection b/w the two sides of the spinal cord gray matter
central canal
The middle of the gray commisure
cerebral spinal fluid
The central canal contains
dorsal
Many somatic and autonomic sensory neurons terminate at the ~ horns
ventral
Many motor pathway neurons terminate at the ~ horns
lateral
Many autonomic motor neurons (sympathetic division) originate at the ~ horns
funiculi
The three columns of white matter surrounding the gray matter on each side of the spinal cord are the dorsal, lateral, and ventral ~
fasciculi
Each funiculus is functionally subdivided into several sensory and motor tracts and ~ (i.e. bundles of muscle fibers)
nerve roots
Neurons enter and exit the spinal cord through 31 sets of ~, which are part of the PNS
dorsal, ventral
Each set of nerve root is made of two ~ roots and two ~ roots
rootlets
The nerve roots branch into several ~ before attaching to the spinal cord
dorsal root ganglion
A small bulge called the ~ occurs along each dorsal root
cell bodies
Inside the dorsal root ganglion are the ~ of the sensory neurons