Lobes, Sulci & Gyri of the brain

Question 1

What does the Parietooccipital sulcus separate?

Answer 1

Parietal lobe from the Occipital lobe

Question 2

What is the central sulcus located?

Answer 2

Between the Frontal lobe and the parietal lobe & motor cortex from the somatosensory cortex

Question 3

Where is the cerebral cortex located?

Answer 3

Outer part of cerebral hemisphere

Question 4

What is the cerebral cortex made up of?

Answer 4

Grey matter, which consists largely of the nerve cell bodies

Question 5

What is the brainstem made up of?

Answer 5

Midbrain, Pons & Medulla oblongata

Question 6

What are the 3 main divisions of the brain?

Answer 6

Forebrain, Midbrain & Hindbrain

Question 7

What is contained within the forebrain?

Answer 7

Hypothalamus, Thalamus and Cerebral Hemispheres

Question 8

What is contained within the hindbrain?

Answer 8

Pons, Medulla Oblongata and Cerebellum

Question 9

Where does the medulla oblongata exit the skull from?

Answer 9

The foramen magma

Question 10

What is the largest foramen in the base of the skull?

Answer 10

Foramen Magma

Question 11

What runs between the two cerebral hemispheres?

Answer 11

Longitudinal Fissure

Question 12

Name the 4 lobes found in each cerebral hemisphere

Answer 12

Frontal lobe
Parietal lobe
Temporal lobe
Occipital lobe

Question 13

What does the anterior cerebral artery supply?

Answer 13

The medial surface till the parietooccipital sulcus and supply a strip one inch wide on the lateral surface

Question 14

State the arterial supply of the medial surface

Answer 14

Anterior & Posterior cerebral artery

Question 15

What does the Middle cerebral artery supply?

Answer 15

The lateral surface except for a narrow strip supplied by ant cerebral artery up and posterior cerebral artery down

Question 16

What is the arterial supply of the lateral surface?

Answer 16

Middle, Interior & Posterior cerebral arteries

Question 17

What does the Posterior cerebral artery supply?

Answer 17

Occipital pole & Inferior surface on both the medial and lateral sides

Question 18

What is the arterial supply of the tip of the temporal lobe?

Answer 18

Branch of the middle cerebral artery

Question 19

List the main sulci of the super-lateral surface

Answer 19

Post Central
Intraparietal
Sup. Temporal
Inferior Temporal
Inferior Forntal
Superior Frontal
Precentral

Question 20

How many main sulcus does the frontal lobe have?

Answer 20

2

Question 21

Where is the central sulcus located?

Answer 21

Between the frontal and parietal lobes

Question 22

What occupies the post-central gyrus?

Answer 22

Primary sensory cortex

Question 23

What occupies the pre-central gyrus?

Answer 23

Primary Motor Cortex

Question 24

What would happen if there was a thrombus on the right side of the brain?

Answer 24

Patient will have lack of movement on the left side

Question 25

Where does most crossing over happen in the brain?

Answer 25

At the medulla oblongata before leaving the foramen magna

Question 26

What separates the Lingual gyrus?

Answer 26

Calcarine sulcus

Question 27

What is the corpus callosum?

Answer 27

Band of nerve fibers that connects the two cerebral hemispheres

Question 28

What is the role of the corpus callousum?

Answer 28

Allows different parts of the cerebrum to communicate with each other

Question 29

What separates the medial surface from the opposite side?

Answer 29

Great longitudinal fissure and the falx cerebri

Question 30

What is white matter made up of?

Answer 30

Largely of axons forming tracts or pathways

Question 31

List the three types of white matter?

Answer 31

Association fibers Commissural fibers Projection fibers

Question 32

Whats the role of association fibres?

Answer 32

Interconnect the cortical areas of the same cerebral hemisphere (connecting areas on the same side)

Question 33

Give an example of association fibres

Answer 33

Superior longitudinal fasciculus connecting the front and the back of cerebrum

Question 34

Whats the role of commissural fibres?

Answer 34

Interconnect the corresponding cortical areas of the two cerebral hemispheres (cross midline)

Question 35

Give examples of commissural fibres

Answer 35

The fornix connects the cortex of the hippocampus in each hemisphere. The corpus callosum the largest commissure. Its first fibers connect the frontal and parietal lobes of both sides

Question 36

Whats the role of projection fibres?

Answer 36

The fibers that descend or ascend between the cerebral cortex and the lower centers in the brain stem and spinal cord (connect brain-spinal cord)

Question 37

Give examples of projection fibres

Answer 37

Corona radiata which connects the cortex above with the thalamus, pons, medulla, and spinal cord