Ch 13.1e Sensory Motor Reflexes

The spinothalamic tract is found in which columns of the spinal cord? Multiple choice question. Posterior and lateral Anterior and posterior Anterior and lateral

Anterior and lateral

Within the spinal cord, which tracts carry information up to the brain? Multiple choice question. Descending Deep Superficial Ascending

Ascending

Where do signals ascending through the spinocerebellar tract terminate? Multiple choice question. Cerebellum Cerebrum Spinal cord Brainstem

Cerebellum

Since the corticospinal tracts decussate, they will innervate which muscles? Multiple choice question. Ipsilateral Contralateral

Contralateral

In the spinoreticular tract, the second order neurons decussate to where? Multiple choice question. Contralateral anterolateral system Ipsilateral anterolateral system

Contralateral anterolateral system

The ___ tract carries signals for precise, finely coordinated limb movements.

Corticospinal

What factor accounts for the fact that the right side of the brain communicates with the left side of the body, and vice versa? Multiple choice question. Its thickness Where it terminates Its length Decussation

Decussation

Within the spinal cord, which tracts carry motor signals down from the brain? Ascending Descending Association Commissural

Descending

Which order neurons of the spinocerebellar tract originate at muscles and tendons? Multiple choice question. Fourth Second Third First

First

In a sensory pathway, which neuron detects the stimulus and transmits the signal to the spinal cord or brainstem? Multiple choice question. Second order First order Third order Fourth order

First order

Where is the origin of sensory signals carried by the cuneate fasciculus? Multiple choice question. From below vertebra T6 and down From vertebra T6 and up

From vertebra T6 and up

Nerve signals carried from the midthoracic and lower parts of the body are carried by which ascending tract? Multiple choice question. Cerebellospinal Cuneate fasciculus Gracile fasciculus Spinothalamic tract

Gracile fasciculus

Nerve signals carried from the midthoracic and lower parts of the body are carried by which ascending tract? Multiple choice question. Cerebellospinal Spinothalamic tract Gracile fasciculus Cuneate fasciculus

Gracile fasciculus

Where do the nerve fibers of the gracile fasciculus terminate in the medulla oblongata? Multiple choice question. Cuneate nucleus Suprachiasmatic nucleus Gracile nucleus Suprathalamic nucleus

Gracile nucleus

Where does the first-order neuron of the spinothalamic tracts end? Multiple choice question. In the brainstem nuclei In the posterior horn at the point of entry At the spinal nucleus of the thalamus

In the posterior horn at the point of entry

Which nerve tracts do not decussate? Multiple choice question. Contralateral Ipsilateral

Ipsilateral

Which tract will have its origin and destination on the same side of the body? Multiple choice question. Contralateral Ipsilateral

Ipsilateral

In which column of the spinal cord is the anterior spinocerebellar tract found? Multiple choice question. Lateral Anterior Posterior

Lateral

In descending tracts, which motor neuron innervates the target organ? Multiple choice question. Intermediate Upper Lower

Lower

The spinoreticular tract carries what type of signals? Multiple choice question. Pain Light touch Deep touch Olfactory

Pain

What type of signal does the spinocerebellar tract carry? Multiple choice question. Proprioception Balance Touch and pressure

Proprioception

Where do the second-order neurons of the spinoreticular tract terminate? Multiple choice question. Gracile nucleus Red nucleus Reticular formation

Reticular formation

Which pathways are made up of three neurons? Multiple choice question. Sensory Motor

Sensory

Where do the third-order neurons of the spinoreticular tract run from the pons to? Multiple choice question. Cerebral cortex Cerebellum Thalamus

Thalamus

In a sensory pathway, which neurons run from the thalamus to the sensory cerebral cortex? Multiple choice question. Third-order Second-order First-order

Third-order

How many neurons are typically found in an ascending pathway between the receptor and the brain? Multiple choice question. Four Three One Two

Three

What is the source of the sensory signals carried by the cuneate fasciculus? Multiple choice question. Upper limbs and chest Head and neck Abdomen and lower limbs

Upper limbs and chest

The spinothalamic tract is part of the ______ system in the anterior and lateral columns. Multiple choice question. central anterolateral posterolateral

anterolateral

The spinothalamic tract is part of the ______ system in the anterior and lateral columns. Multiple choice question. posterolateral central anterolateral

anterolateral

Because the nerve tracts of the spinal cord undergo _____ , the right side of the brain communicates with the left side of the body, and vice versa.

decussation

The tract indicated in the figure by the letter A is the ____ fasciculus.

gracile

What does contralateral mean? Multiple choice question. That two points are on the same side of the body. That two points are on opposite sides of the body.

hat two points are on opposite sides of the body.

The third-order neurons of the spinoreticular tract runs from the ______ to the thalamus. Multiple choice question. cerebellum cerebrum thalamus pons

pons

In the spinothalamic tract, the ______ -order neurons decussate from the posterior horn of the spinal cord. Multiple choice question. second third first

second

Signals for proprioception are carried by the anterior and posterior ____ tract.

spinocerebellar

The number of neurons in a descending pathway is ___.

two

Consider the two motor neurons that form descending pathways. The neurons called ___ the motor neurons have their somas in the cerebral cortex or brainstem.

upper