Quiz #4 - CNS - The Spinal Cord (A&P)

Spinal nerves are involved in sensory and motor innervation of the entire body __________.

inferior to the head.

The spinal cord provides a two-way __________ pathway between the brain and the body.

conduction

The spinal cord is a long __________ cm long cylinder from the foramen magnum to somewhere between L1 and L2.

45

The spinal cord tapers off to a point called the __________ between L1 and L2.

conus medullaris

A long connective tissue filament called the __________ connects the conus medullaris to the coccyx.

filum terminale

The spinal cord has __________ prominent surface folds.

two

The anterior surface fold of the spinal cord is called the __________ median fissure.

ventral

The posterior surface fold of the spinal cord is called the __________ median sulcus.

dorsal

The spinal cord contains __________ spinal cord segments from which spinal nerve roots and spinal nerves originate.

31

There are __________ cervical spinal cord segments with 8 cervical spinal nerve pairs attached named C1-C8.

8

Cervical spinal nerves exit above the __________ vertebrae they are named for.

cervical

Spinal roots for lumbar and sacral spinal nerves create a structure that looks like a horse's tail called the __________.

cauda equina

There are enlarged regions of the spinal cord in the __________ and __________ regions.

cervical, lumbar

The cervical enlargement is to accommodate extra neurons that control the __________.

upper limbs

The lumbar enlargement is to accommodate extra neurons that control the __________.

lower limbs

In the center of the spinal cord, there is a small tube called the __________ that carries CSF.

central canal

The __________ carries CSF from the fourth ventricle in the brain to the conus medullaris.

central canal

The inner layer of the spinal cord is made up of __________ matter.

gray

The outer layer of the spinal cord is made up of __________ matter.

white

The posterior/dorsal horn contains portions of __________ sensory neurons.

somatic

The anterior sections of the dorsal horn contain portions of __________ sensory neurons.

visceral

The lateral horn contains the cell bodies of __________ motor neurons only.

visceral

The anterior/ventral horn contains the cell bodies of __________ motor neurons only.

somatic

The gray commissure surrounds the __________ canal.

central

The outer white matter regions are divided into sections called __________ or funiculi.

white columns

The posterior region of white matter is called the __________ funiculus.

dorsal

The lateral region of white matter is called the __________ funiculus.

lateral

The anterior region of white matter is called the __________ funiculus.

ventral

The dorsal root contains the axons of __________ neurons only.

sensory

The ventral root contains the axons of __________ neurons only.

motor

Spinal nerves are __________ nerves that contain both sensory and motor axons.

mixed

Spinal nerves immediately split into branches called spinal __________.

rami

The dorsal root contains an enlarged section called the __________ root ganglion.

dorsal

The spinal cord extends from the __________ magnum to L1 or L2.

foramen

The spinal cord segments from L1 to Co1 are all located in the __________ medullaris.

conus

The __________ contains axons of sensory and motor pathways in the white matter.

posterior funiculus

The __________ funiculus is located between the posterior horn and tip of the anterior horn.

lateral

The anterior funiculus is located between the tip of the anterior horn and the __________ median fissure.

anterior

Short axons that cross over from the left side to the right side of the spinal cord are found in the __________ commissure.

gray