1. CNS Organization II

Question 1

Diencephalon: What part contains the Pineal gland?

Answer 1

Epithalamus

Question 2

Diencephalon: What does the Pineal glad secrete?

Answer 2

Melatonin (Note: in response to darkness)

Question 3

Diencephalon: Hypothalamus controls what? (3)

Answer 3

1. Body Temperature
2. Hunger and Thirst
3. Fatigue and Sleep

Question 4

Diencephalon: What three signals does the Thalamus receive?

Answer 4

1. Visual (LGN)
2. Auditory (MGN)
3. Sensory (VPL/VPM)

Question 5

List three subdivisions of the brain stem from rostral to caudal.

Answer 5

^ Rostral
1. Midbrain
2. Pons
3. Medulla
v Caudual

Question 6

What supplies the brain stem with blood?

Answer 6

Vertebral Arteries

Question 7

Two arteries that Vertebral Arteries give rise to.

Answer 7

1. Posterior Inferior Cerebellar Artery (PICA)
2. Basilar Artery

Question 8

Basilar Artery gives rise to what three arteries?

Answer 8

1. Anterior Inferior Cerebellar Artery
2. Superior Cerebellar Artery
3. Posterior Cerebral Artery

(Note: there is 2 of each)

Question 9

While the other two of Basilar Arteries give rise to blood supply to the pons, which of the three supplies the midbrain?

Answer 9

Posterior Cerebral Artery

Question 10

The 5 regions of the spine from top to bottom

Answer 10

^ Rostral
1. Cervical
2. Thoracic
3. Lumbar
4. Sacral
5. Coccyx
v Caudual

Question 11

Within spinal cord anatomy, we can see two enlargements of neuronal density. Where and why?

Answer 11

1. Cervical - Innervates the upper limb muscles
2. Lumbar- Innervates the lower limb muscles

Question 12

What is the name of the tapered, cone-shaped end of the spinal cord, located near the first or second lumbar vertebrae in the lower back?

Answer 12

Conus Medullaris

Question 13

Name of the collection of lumbar and sacral spinal roots in the lumbar cistern below L2?

Answer 13

Cauda Equina

Question 14

In the spinal cord, what makes up the larger anterior wings of the butterfly? (Grey matter)

Answer 14

Ventral Horn

Question 15

What is the location of cell bodies of sensory neurons in the spinal cord grey matter?

Answer 15

Dorsal Horns

Question 16

What is the location of cell bodies lower mother neurons in the spinal cord grey matter? (Innervates the limb and trunk skeletal muscles)

Answer 16

Ventral Horns

Question 17

What is spinal cord White Matter composed of?

Answer 17

Ascending and Descending myelinated fiber tracts

Question 18

Sensory fibers travel from spinal ganglia to…

Answer 18

CNS

Question 19

Motor fiber travel from ___ to ___ via ventral roots.

Answer 19

1. Ventral Horn
2. Muscles