Week 4 (B) - Complete

Question 1

What is meant by the term Somatosensory feedback?

Answer 1

Sensation of the body and its movements

Question 2

What are the four types of receptors that provide SOMATOSENSORY FEEDBACK, and what do they do?

Answer 2

1. FREE NERVE ENDINGS: Pain, warmth cold
2. MERKEL’S DISKs: light touch
3. PACINIAN CORPUSCLES: deep pressure
4. HAIR FOLLICLE: movement of hairs

Question 3

IN the context of somatosensory feedback, what is meant by the term DERMATOME?

Answer 3

The area of the body each spinal nerve innervates

Question 4

The somatosensory cortex is one row BEHIND the motor cortex, T/F

Answer 4

TRUE

Question 5

Where, apart from the somatosensory cortex, is somatosensory information sent??

Answer 5

The INSULAR

Question 6

What is the INSULA involved in?

Answer 6

Emotions

Question 7

How is the INSULA implicated in the processing of somatosensory stimuli?

Answer 7

Gives an emotional valence

Question 8

What are the TWO brain regions that we learned are important for the processing of SOMATOSENSORY INFORMATION

SC I

Answer 8

1. Somatosensory cortex

2. Insular

Question 9

What happens if you damage one of the two brain regions relevant to the processing of somatosensory information?

Answer 9

Separation of the emotional content and sensory content of sensation

Question 10

In the context of motor movement, what is an EFFERENT COPY?

Answer 10

A copy of the motor command, which is kind of cc’d to the sensory regions

This enables the planned movement to be cross checked against the actual movement

Question 11

What is another name for EFFERENT COPY?

Answer 11

COROLLARY DISCHARGE

Question 12

What are the TWO types of tickle mentioned in lectures?

Answer 12

1. ‘Itch’ type

2. ‘Deep laughter provoking’ type

Question 13

Which two brain regions are activated by LIGHT TOUCH

SC ACC

Answer 13

1. SOMATOSENSORY cortex

2. ANTERIOR CINGULATE cortex

Question 14

Which brain region is activated when laughing deeply?

Answer 14

1. ANTERIOR SUPPLEMENTAL cortex

Question 15

Something to do with self tickle and SCZ

Answer 15

I think this is the idea that there’s some kind of break down in the EFFERENT COPY system. I think SCZs don’t recognise self tickle as themselves when their symptoms are present.

This helps explain other symptoms - like thinking voices originate elsewhere

Question 16

Maybe something about telepathy…?

Answer 16

Not sure tho

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0105225

Question 17

In the case of BLINDSIGHT, which brain regions is damaged and which is in tact?

VC PPC

Answer 17

1. VISUAL CORTEX damaged

2. POSTERIOR PARIETAL CORTEX in tact