Exam 3 Brain Lower SG (pt2) Flashcards Preview

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Flashcards in Exam 3 Brain Lower SG (pt2) Deck (15)
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1
Q

Compare the normal rate of CSF formation with the normal rate of CSF reabsorption.

A

it is reabsorbed as fast as it is formed, (meaning the pressure remains constant)

2
Q

Why is hydrocephalus detrimental?

A

the fluid buildup compresses and damages nerve tissue

3
Q

State the sub-components of the brain stem?

A

Medulla oblongata, pons, and midbrain

4
Q

What is the essential function of the medulla oblongata?

A

White matter of the medulla contains all ascending (sensory) and descending (motor) tracts between the spinal cord and other parts of the brain

5
Q

Where are the gracile and cuneate nuclei located?

A

Located in the posterior part of the medulla

6
Q

What sensations are the gracile and cuneate nuclei associated with?

A

sensations of touch, conscious proprioception, pressure, and vibration.

7
Q

What order neurons comprise the medial lemniscus?

A

The second-order neurons

8
Q

Name the cranial nerve nuclei that are in the medulla?

A
  1. Vestibulocochlear (VIII)
  2. Glossopharyngeal (IX)
  3. Vagus (X)
  4. Accessory (XI)
  5. Hypoglossal (XII)
9
Q

State the function of the medullary nuclei while at the cardiovascular center.

A

regulates rate and force of the heartbeat and blood vessel diameter

10
Q

State the function of the medullary nuclei while at the medullary rhythmicity (part of the respiratory center).

A

adjusts the basic rhythm of breathing

11
Q

State the function of the medullary nuclei while at the deglutition center of the medulla.

A

promotes swallowing, AKA deglutition of a mass (bolus) of food that has moved from the mouth into the pharynx (throat)

12
Q

State the function of the medullary nuclei while at the cough center

A

Coughing, which involves a long drawn and deep inhalation followed by a strong exhalation

13
Q

State the function of the medullary nuclei while at the hiccup center

A

Hiccupping, caused by spasmodic contraction of the diaphragm

14
Q

State the function of the medullary nuclei while at the sneeze center.

A

Sneezing, the spasmodic contraction of breathing muscles that forcefully expel air through the nose and mouth

15
Q

State the function of the medullary nuclei while at the vomiting center.

A

causes vomiting, the forcible expulsion of the contents of the upper gastrointestinal tract through the mouth