Two patients with optic ataxia both made grasping movements towards a target object. What does this tell us?
a) They needed real time bottom-up guidance for object identification.
b) There is memory involvement in the ventral stream, because these patients could use their ventral stream as it was intact. The grasping demonstrated top-down processing.
c) These patients cannot recognise objects and wanted to use touch sense to identify it.
d) There wasn't memory involvement because their dorsal stream was intact and that is what was needed to grasp.
Ans: b) There is memory involvement in the ventral stream, because these patients could use their ventral stream as it was intact. The grasping demonstrated top-down processing.
You might also like to view...
Which defense mechanism did Freud believe was crucial to the development of culture and civilization?
a) Rationalization b) Reaction formation c) Identification d) Sublimation
Depressed individuals who are not helped by standard antidepressants may take drugs that block the enzyme responsible for breaking down norepinephrine and serotonin. These drugs are called __________
a) benzodiazepines. b) monoamine oxidase (MAO) inhibitors. c) tricyclics. d) selective serotonin reuptake inhibitors (SSRIs).