Hemispatial neglect and extinction

Question 1

how does hemispatial neglect come about?

Answer 1

Usually it’s because of a stroke-

Buildup of fatty acids in the main arteries leading up to the brain, taking blood up to the brain. So you get diseased arterial disease carotid artery.

Causes a blockage in the artery and the blood pressure will build up and eventually what we call a thrombus will break off and well travel up the cerebral artery.

Neurons in that particular brain region will be starved of oxygen and will begin to die off and will be replaced by fluid.

Question 2

define lesion

Answer 2

area of brain damage

Question 3

define contralesional stimuli

Answer 3

Things occurring on the opposite side to the lesion.

Question 4

define ipsilesional stimuli

Answer 4

Thigs occurring on the same side as the lesion.

Question 5

tests to give to stroke patients -

Answer 5

1 - cancellation test

2 - drawing task

Question 6

neglect/ extinction and attention

Answer 6

attention selects internal representations as well as external stimuli.

attention operates in an object-centered frame of reference.

attention also requires suppression of irrelevant information.

Question 7

neuroanatomy of neglect - inferior parietal

Answer 7

Perceptive/ visuospatial

Bias in line bisection

Question 8

neuroanatomy of neglect - temporal lobe

Answer 8

Allocentric/ object-centred

Missing left side of objects

Question 9

neuroanatomy of neglect right DLPFC

Answer 9

Exploratory/ visuomotor

Omission of targets in cancellation tasks.