Morphology (Part 1)

Question 1

Define a gyrus

Answer 1

a prominent landmark of the cerebral surface

Question 2

Define a sulcus.

Answer 2

The valley between two gyri

Question 3

What is the significance of the central sulcus?

Answer 3

Separates the frontal and parietal lobes.

Question 4

What is the significance of the lateral (sylvian) fissure?

Answer 4

Separates the Parietal and Frontal lobes from the Temporal lobes

Question 5

What separates the occipital lobe from the parietal and temporal lobes?

Answer 5

An arbitrary line drawn connecting the preoccipital notch and the marginal end of the parieto-occipital sulcus.

Question 6

Dissection/retraction of the frontal, parietal, and temporal opercula reveals what?

Answer 6

a lateral view of the normally hidden insula and circular sulcus.

Question 7

What divides the parietal and occipital lobes?

Answer 7

parieto-occipital sulcus

Question 8

The cingulate sulcus separates what?

Answer 8

The frontal and parietal lobes from the limbic lobe

Question 9

What is the location of the limbic lobe?

Answer 9

Superior part sits between the corpus callosum and cingulate sulcus.

Question 10

In regards to the inferior aspect of the brain, what occupy the base of the diencephalon?

Answer 10

• Mammillary bodies

- Stalk of the pituitary

Question 11

In regards to the inferior surface of the brain, what structures are prominent on the ventral medulla oblongata, caudal to the pons?

Answer 11

• Pyramids

- Pons

Question 12

What cranial nerves are associated with the Telencephalon?

Answer 12

CN I (Olfactory nerves)

Question 13

What cranial nerves are associated with the Diencephalon?

Answer 13

CN II - Optic nerve

Question 14

What are the structures associated with CN I found within the Telencephalon?

Answer 14

• Olfactory tract
• Olfactory bulb
• Olfactory cortex

Question 15

What are the structures associated with CN II found within the Diencephalon?

Answer 15

• Optic chiasm
• Optic tract
• Lateral geniculate body

Question 16

What is the cranial nerve found within the ventral Mesencephalon?

Answer 16

CN III- Oculomotor nerve

Question 17

What is the cranial nerve found within the dorsal Mesencephalon?

Answer 17

CN IV - Trochlear nerve

Question 18

What are the structures associated with the oculomotor nerve of the ventral mesencephalon?

Answer 18

Interpeduncular fossa

Question 19

What structure is associated with the trochlear nerve of the dorsal mesencephalon?

Answer 19

Inferior colliculi

Question 20

Which cranial nerves stem from the cerebellopontine angle?

Answer 20

• VII - Facial nerve
• VIII - Vestibulocochlear nerve

(* tumors like to appear in this area)

Question 21

Which cranial nerves stem from the postolivary sulcus?

Answer 21

• IX - Glossopharyngeal nerve
• X - Vagus
• XI - Spinal accessory

Question 22

Which cranial nerve stems from the pons?

Answer 22

• V- trigeminal

Question 23

Which cranial nerve stems from the ponto-medullary junction?

Answer 23

VI - Abducens

Question 24

Which cranial nerve stems from the medulla, preolivary sulcus

Answer 24

• XII- Hypoglossal nerve