Class 10 - Parietal lobe

Question 1

What sulci/fissues border the parietal lobe?

Answer 1

Sylvian fissure, central fissure, parieto-occipital sulcus

Question 2

What are the Brodmann’s areas for the postcentral gyrus?

Answer 2

1 , 2 , 3

Question 3

What are the Brodmann’s areas for the superior parietal lobe?

Answer 3

5, 7

Question 4

What are the Brodmann’s areas for the parietal operculum?

Answer 4

43

Question 5

What are the Brodmann’s areas for the supramarginal gyrus?

Answer 5

40

Question 6

What are the Brodmann’s areas for the angular gyrus?

Answer 6

39

Question 7

Which von Economo posterior parietal area is polymodal and larger in the right hemisphere?

Answer 7

PG

Question 8

What does the intraparietal sulcus (cIPS) do?

Answer 8

Control of saccadic eye movements (LIP) and visual control of object grasping (AIP)

Question 9

What does the parietal reach regions (PRR) do?

Answer 9

Visually guided grapsing movements

Question 10

What are the inputs and outputs of area PE (somatosensory)?

Answer 10

Inputs: somatosensory strip
Outpus: primary motor cortex, supplementary motor cortex, premotor regions, area PF

Question 11

What are the inputs and outputs of area PF?

Answer 11

Inputs: sensory to premotor cortex, small visual input from PGO area
Outputs: primary motor cortex, supplementary motor cortex, premotor regions, area PF

Question 12

What is another name for area PG? What stream is it a part of?

Answer 12

“Parieto-temporo-occipital crossroad”, part of the dorsal stream

Question 13

What do the supramarginal and angular gyri do?

Answer 13

Involved in language and reading (near Wernicke’s area)… possibly arithmetic

Question 14

What is hapsis?

Answer 14

Perception of objects using fine touch and pressure (think about haptic feedback on your phone)

Question 15

what is proprioception?

Answer 15

Body sense

Question 16

What is nocioception?

Answer 16

Perception of pain and temperature stimuli… usually unpleasant

Question 17

Is balance a parietal lobe function?

Answer 17

No, it is in the vestibular system of the ear

Question 18

How many homunculi are there?

Answer 18

At least 4. Muscles, fast skin, slow skin and joints/pressure

Question 19

What is stereognosis?

Answer 19

Ability to identify objects by touch

Question 20

What is finger graphesthesia?

Answer 20

Ability to identify writing on palms or fingertips

Question 21

What is double simultaneous stimulation?

Answer 21

Ability to identify two identical but separate sensory inputs (can be visual or touch)

Question 22

What is spatial navigation by a cognitive spatial map mediated by (unconscious knowledge of how to reach destination)?

Answer 22

Medial parietal region (MPR)

Question 23

What are three symptoms of parietal lobe damage that do not fit with the visuomotor view of the parietal lobe?

Answer 23

1. Arithmetic difficulties
2. Language difficulties
3. Movement sequence difficulties

Question 24

What is acalculia and how might it result from parietal lobe patients?

Answer 24

The inability to do arithmetic. Could be due to the spatial properties of addition and subtraction

Question 25

What part of the parietal is associated with large, distributed networks?

Answer 25

Posterior parietal association cortex

Question 26

Why might parietal lobe damage patients have problem with movement sequencing?

Answer 26

Individual elements of the movement have spatial organization