Lecture 1: The Human Brain

Question 1

Answer 1

Question 2

Answer 2

Question 3

Answer 3

Question 4

What are the major differences between the homonculus on the somatosensory cortex and the primary motor cortex?

Answer 4

Somatosensory cortex has:

• Huge lips, jaw

Motor cortex

• Huge hand representaiton, face representation

Question 5

What is brocas area?

Answer 5

Motor aspect of speech

Question 6

What is wernickes area?

Answer 6

Sensory aspect of what sound/speech means (not in sensory cortex)

Question 7

What is exners area?

Answer 7

Motor control of hand

Question 8

What is the function of the supramarginal gyrus?

Answer 8

Reading

Question 9

What is the function of the angular gyrus?

Answer 9

Writing

Question 10

What is the function of the frontal assocatiation cortex?

Answer 10

Intelligence, behvaiour, mood, personality

Question 11

What is the function of the parietal association?

Answer 11

Spatial skills, 3D recognition, Shapes/Faces

Question 12

What is the functional of the temporal association cortex?

Answer 12

Memory, Aggression, Intelligence

Question 13

What are the types of white matter tract fibres?

Answer 13

Association fibres

Commissural fibres

Projection fibres

Question 14

What are association fibres?

Answer 14

Connections within the same hemisphere i.e Arcuate fasiculus

Question 15

What are commisural fibres?

Answer 15

Connections between two hemispheres i.e corpus collosum

Question 16

What are projection fibres?

Answer 16

Connections between the brain and spinal cord or muscle

Question 17

What happens when there is a lesion to brocas area?

Answer 17

Non-fluent aphasia

i.e cant vocalise but can understand speech (as shown by written resonse)

Question 18

What happens when there is a lesion to wernickes area?

Answer 18

Fluent aphasia

Difficulty making sense of language

Question 19

What happens when there is a lesion in the arcuate fasiculus?

Answer 19

Hear and understand ok, verbalise ok, answers are completely disconnected from question. Test using other fasiculus i.e written response to speech

Question 20

What is the dominant hemisphere?

Answer 20

Some brain areas are found on both sides.

But

Lanauge areas are localised to left side of brain in most people even left handed. Although some left handed have right side dominance.

Left side considered dominant because these areas were discovered first.

Question 21

What is the function of the dorsolateral pre-frontal cortex?

Answer 21

• Reason
• Morality
• Right v Wrong
• Orders best-worst

Question 22

What is the function of the ventro-lateral pre-frontal cortex?

Answer 22

Ability to pay attention despite distractions

How you view the world as it changes around you.

Question 23

What is the function of the orbito-frontal pre-frontal cortex?

Answer 23

• Emotion
• FFF response
• Reward based decision making

Question 24

Answer 24