Week 4: Brain anatomy - Lobes of the brain & Corpus collosum

Question 1

How many lobes does the cerebral cortex (ie outermost layer of the brain) have?

Answer 1

5 lobes

Question 2

The 4 lobes (which can be viewed from a lateral perspective) are named as result of the ……. that overlies them

Answer 2

Cranial Bone

Question 3

The frontal lobe is the most …… region of the cerebrum.

It is separated at the back by the …… sulcus

The frontal cortex is separated …….. by the lateral sulcus

Answer 3

1. Anterior
2. Central
3. Inferoposteriorly

Question 4

The frontal lobe is responsible for…..

Answer 4

Personality
Mood
Intellect
Social conduct
Language

*It is known as the area of the brain which makes us human

Question 5

The parietal lobe is located between the ….. lobe and ….. lobe.

What sulcus separates the parietal lobe from the frontal lobe?

What sulcus separates the parietal lobe from the occipital lobe?

The parietal lobe sits above the ….. lobe and is separated from this lobe by the …… sulcus (sylvian fissure)

Answer 5

1. Occipital & frontal
2. Central sulcus
3. Parietal occipital sulcus
4. Temporal & lateral sulcus

Question 6

The parietal lobe is responsible for…..

Answer 6

Its cortical association contribute to:

Language
Calculation
Visuospatial function eg two point discrimination
Proprioception
Inform us about objects in our external environment

Summary: integrates sensory input and construction of a spatial coordinates system to represent the world around us.

Question 7

The temporal lobe sits ….. to the frontal lobe and parietal lobe

The temporal lobe controls…..

The primary ….. cortex is located here

Answer 7

1. Inferiorly
2. Memory, language and hearing
3. Auditory

Question 8

The occipital lobe is the most …… region of the brain

The bottom part of the occipital lobe rests on the ………. - this supports the occipital lobe …… and is where the occipital lobe sits

The ……….. sulcus separates the occipital lobe from the parietal and temporal lobe

The primary …… cortex is located in this area as such its cortical association is solely responsible for …..

Answer 8

1. Posterior
2. Tentorium Cerebelli. Inferiorly.
3. Parietal occipital sulcus
4. Visual
5. Vision

Question 9

In the limbic lobe the …….. wraps around the corpus collosum on the ……. surface of the cerebral hemisphere

It is separated from the overlying frontal lobe by the …….. sulcus

The boundary with the parietal lobe is separated by the …….. sulcus

Answer 9

1. Cingulate gyrus. Medial.
2. Singular
3. Subparietal

Question 10

The corpus collosum is located inferiorly to the?

Answer 10

Cingular gyrus

Question 11

The right & left hemisphere are connected by a thick bundle of nerves known as the ……

Answer 11

Corpus collosum

Question 12

What is the role of the corpus collosum?

Answer 12

Ensures that both sides of the brain can communicate and send signals to one another.

A combination of sensory, motor and cognitive information that is consistently being transferred

Question 13

How many axons are in the average corpus collosum?

Answer 13

300 million

Question 14

The corpus collosum is located in the ……. matter of the cerebrum and is approximately ……. long at the midline

Answer 14

White & 10cm

Question 15

This (Corpus collosum) neural bridge is the largest white matter structure in the brain. True or False.

Answer 15

TRUE

Question 16

Surgical severing of the corpus collosum can be warranted as a last resort method in managing people with untreatable epilepsy. Why?

Answer 16

This cutting of the corpus collosum is an attempt to stop seizures or the abnormal electrical activity caused by seizures to spread across to the other side of the brain