Anp Ii Chapter 13: Spinal Cord, Spinal Nerves, And Somatic Reflexes

Front 1

In the PNS, the cell bodies of neurons are concentrated in masses called __.

Back 1

Ganglia

Front 2

The fibrous sheath around a nerve is called the __.

Back 2

Epineurium

Front 3

All __ nerves are mixed nerves.

Back 3

Spinal

Front 4

Sensory signals to the spinal cord enter it by way of its __.

Back 4

Posterior horn

Front 5

__ is the crossing of nerve fibers from one side of the CNS to the other as they ascend from or descend to the brain or spinal cord.

Back 5

Decussation

Front 6

White matter in the spinal cord is divided into columns that contain __.

Back 6

Tracts

Front 7

The axillary, radial, and ulnar nerves arise from the __ plexus.

Back 7

Brachial

Front 8

The __ ramus of a spinal nerve innervates the muscles, joints, and skin of the back at that spinal nerve level.

Back 8

Posterior

Front 9

__ in the spinal cord contains heavily myelinated nerve fibers.

Back 9

White matter

Front 10

Most cerebrospinal fluid around the spinal cord is found in the __.

Back 10

Subarachnoid space

Front 11

The spinal cord ends in the __ at about the level of L1.

Back 11

Conus Medullaris

Front 12

Area of skin innervated by one spinal nerve

Back 12

Dermatome

Front 13

Nerve fibers that conduct signals from the CNS to a muscle or gland

Back 13

Efferent

Front 14

Contains the neurosomas of afferent somatosensory neurons

Back 14

Posterior root ganglion

Front 15

Carries pain information from tissue injury

Back 15

Spinoreticular tract

Front 16

T/F
Most nerves are sensory nerves.

Back 16

False

Front 17

T/F
Proprioceptors are sense organs that detect changes in position and movement of the body.

Back 17

True

Front 18

T/F
The origin and destination of a nerve tract are on the same side of the body.

Back 18

False

Front 19

T/F
Rabies is caused by a virus that affects the CNS.

Back 19

True

Front 20

T/F
Testing somatic reflexes can aid in diagnosing diabetes mellitus.

Back 20

True

Front 21

T/F
The spinothalamic tract is a descending motor pathway that controls fine movements of the limbs.

Back 21

False

Front 22

Spinal nerves form all of hte following plexuses except: cervical; brachial; thoracic; lumbar; coccygeal

Back 22

Thoracic

Front 23

A reflex arc always includes all of these except: a motor neuron; a receptor; the brain; an afferent neuron; an effector

Back 23

The brain

Front 24

Many nerves in the cauda equina innervate:

Back 24

The lower extremities

Front 25

All are functions of the spinal cord except:
conducts messages from the brain to effectors
locomotion
perception of sensations
carries information from sensors to the brain
it is a reflex center

Back 25

Perception of sensations

Front 26

Given the anatomy of the spinal cord, epidural injections should be given:

Back 26

Between L2 and L4

Front 27

The phrenic nerve, which innervates the diaphragm, is a branch of the __ plexus.

Back 27

Cervical

Front 28

There are __ pairs of spinal nerves.

Back 28

31

Front 29

Nerve pain associated with pressure on spinal nerves is:

Back 29

Neuralgia

Front 30

Ascending sensory pathways usually require __ neurons, while descending motor pathways typically require __ neurons.

Back 30

Three; Two

Front 31

Which of these is/are true about the brachial plexus?
1) it forms the long thoracic nerves.
2) its cords in the armpits can be subject to "crutch" paralysis
3) it includes roots, trunks, and anterior and posterior divisions.
4) it forms from posterior rami of C4-T2

Back 31

1, 2, and 3
1) it forms the long thoracic nerves.
2) its cords in the armpits can be subject to "crutch" paralysis
3) it includes roots, trunks, and anterior and posterior divisions.

Front 32

Term: -algia

Back 32

Pain

Front 33

Term: -tom

Back 33

Segmant

Front 34

Term: contra-

Back 34

Opposite

Front 35

Term: baro-

Back 35

Pressure

Front 36

Term: dura

Back 36

Tough/Hard

Front 37

Term: polio

Back 37

Gray