Ascending Pathways

Question 1

The somatosensory pathways refer to the bundles of ascending fibers from the spinal cord to higher centers that are known as

Answer 1

Ascending tracts

Question 2

In the first order neuron, a peripheral process connects with a ___________

Answer 2

sensory receptor ending

Question 3

In the first order neuron, a __________ process enters the spinal cord through the posterior root to synapse on the second-order neuron

Answer 3

central

Question 4

The ascending neuron that gives rise to a projection fiber that passes to a sensory ganglion of the cerebral cortex

Answer 4

Third-order neuron

Question 5

This is formed from the ascending and descending branches of the Lateral Spinothalamic tract that travel for a distance of one or two segments of the spinal cord

Answer 5

Posterolateral Tract of Lissauer

Question 6

Fibers of the first-order neuron of LST terminate by synapsing with cells in the __________ in the posterior gray horn.

Answer 6

substantia gelatinosa

Question 7

As the lateral spinothalamic tract ascends through the medulla, it lies near the lateral surface and between the ________ nucleus and the _______ nucleus of the trigeminal nerve.

Answer 7

inferior olivary nucleus

spinal nucleus

Question 8

Components of the Spinal Lemniscu

Answer 8

Anterior and Lateral Spinothalamic and Spinotectal tract

Question 9

Where are emotional reactions initiated in the pathway of the Spinal lemniscus?

Answer 9

VPL

Question 10

The role of the _____________ is interpreting the quality of the sensory information at the level of consciousness

Answer 10

cerebral cortex

Question 11

Termination of the majority of the slow pain fibers in the lateral spinothalamic tract

Answer 11

Reticular formation

Question 12

Responsible for the interpretation of pain in relation to past experiences

Answer 12

POSTCENTRAL GYRUS

Question 13

The part of the cerebral hemisphere involved with the interpretation of the emotional aspect of pain is which of the following?

Answer 13

Cingulate gyrus

Question 14

Concerned with the interpretation of pain stimuli from the internal organs of the body and brings about an autonomic response

Answer 14

Insula

Question 15

Fasciculus gracilis contains long-ascending fibers from which segments of the SC?

Answer 15

sacral, lumbar, and lower six of the thoracic spinal nerves (T7 – T12)

Question 16

Fasciculus cuneatus contains long-ascending fibers from which segments of the SC?

Answer 16

the upper six of the thoracic spinal nerves and all the cervical spinal nerves

Question 17

Both short and long descending fibers of the posterior white column are involved with ____________ reflexes

Answer 17

intersegmental

Question 18

Where is the BS location of the nucleus cuneatus and gracilis?

Answer 18

Medulla O.

Question 19

The axons of the second-order neurons of the Posterior white column are called ___________

Answer 19

internal arcuate fibers

Question 20

The internal arcuate fibers ascend as a single compact bundle, the _______________, travel through the medulla oblongata, pons, and midbrain to reach the thalamus

Answer 20

medial lemniscus

Question 21

What is the second-order neuron of the spinocerebellar tract?

Answer 21

Nucleus Dorsalis or Clarke’s column

Question 22

The nucleus dorsalis extends only from which spinal cord segments?

Answer 22

C8 – L3 or L4

Question 23

Which SPINOCEREBELLAR TRACT have majority of its axons crossing the opposite side?

Answer 23

Anterior

Question 24

Which of the SPINOCEREBELLAR TRACTS enter through the superior cerebellar peduncle

Answer 24

ANTERIOR SPINOCEREBELLAR TRACT

Question 25

Tract that brings about movements of the eyes and head toward the source of the stimulation

Answer 25

Spinotectal tract

Question 26

Peripheral process of the visceral sensory cells receives nerve impulses from ____________ receptor endings in the viscera

Answer 26

pain and stretch

Question 27

Causes of visceral pain:

Answer 27

▪ ischemia
▪ chemical damage
▪ spasm of smooth muscle
▪ distension

Question 28

Fibers of the cuneocerebellar tract are known as the:

Answer 28

posterior arcuate fibers