Nervous system ~ Spinal Cord (CNS)

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Vocab from the Get Body Smart page found here: http://www.getbodysmart.com/ap/nervoussystem/cns/spinalcord/segments/tutorial.html

31

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

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