Labs

Question 1

Largest white matter tract in the brain

Answer 1

Corpus Callosum, it is a commissural fiber.

Question 2

Forebrain

Answer 2

Cerebral hemispheres + diencephalon (thalamus + hypothalamus).

Question 3

Cerebral Peduncles

Answer 3

Connects the forebrain with all caudal structures such as pons, medulla, cerebellum etc..
It is part of the mesencephalon (midbrain)

Question 4

Central Sulcus

Answer 4

Seperates the frontal lobe from the parietal lobe.

Question 5

Lateral Fissure

Answer 5

Seperates the temporal lobe , from both frontal and parietal lobes.
When it is fissure it means very deep.
Deeper than gyri.

Question 6

Parieto-Occiptal Sulcus

Answer 6

Seperates the ocipital lobe from the parietal lobe.

Question 7

Lateral Ventricles

Answer 7

Anterior horn of it is in the frontal and parietal lobes, posterior horn extends into the occipital lobe, inferior horn extends into the temporal lobe.

Question 8

Location of the 3rd ventricle

Answer 8

Thalamus is on either side of the 3rd ventricle.

Question 9

Cerebral Aqueduct

Answer 9

3rd ventricle connects with the 4th ventricle via the cerebral aqueduct

Question 10

Association Fibers

Answer 10

Connects all parts of the brain within one hemisphere.

So association fibers connect all the lobes.

Question 11

Commissural Fibers

Answer 11

Connects the two hemispheres.

Question 12

Projection Fibers

Answer 12

Travels between the cortex and the brain stem, allowing the connection of the forebrain with the brain stem and the spinal cord.

Question 13

Superior Longitudinal Fasciculus

Answer 13

It is an association fiber.
Connects all the lobes together (Frondal, parietali occipital, temporal).
Important for the integration of sensory information.

Question 14

Arcuate Fasciculus

Answer 14

It is also an association fiber and it is part of superior longitudinal fasciculus (just inferior). Fibers enter the temporal lobe.
Arcuate Fasciculus connects the language areas.
Brocas’ area : frontal lobe
Wernickes’ area : parietal and temporal lobe.

Question 15

Ascending and descending fibers

Answer 15

They are projection fibers , they connect the forebrain with the brain stem and spinal cord.
Ascending from brain stem to the cortex and descending from cortex to the brain stem.

Question 16

Inferior Occipitofrontal Fasciculus

Answer 16

It is an association fiber connecting occipital and frontal lobes.

Question 17

Uncinate Fasciculus

Answer 17

Connects the frontal and temporal lobes.

Question 18

Internal Capsule

Answer 18

Horizontal view :
Internal capsule is divided into anterior and posterior limbs.
Anterior limb divides the head of the caudate nucleus
from the putamen and globus pallidus.
Posterior limb seperates the thalamus from the putamen and globus pallidus.

Question 19

Limbic Lobe

Answer 19

Combination of Cingulate Gyrus and Parahippocampal gyrus.

Anterior swelling of the parahippocampal gyrus : Uncus.

Question 20

Deep structures of the limbic system

Answer 20

Hippocampus( memory )and Amygdala ( emotion)