Deck 17: Extension: C - Cortical Networks and Disconnection Syndromes

Question 1

Which is true of information processed during dichotic - listening experiments?

A) Information presented to the right ear is preferred.
B) Only language information can cross over via the corpus callosum.
C) Non-native English speakers show a preference for content words.
D) The removal of all hemispheric commissures leads to an inability to process multiple inputs.

Answer 1

Information presented to the right ear is preferred.

Question 2

The incidence rate of agenesis of the corpus callosum is:

A) 1 per 100,000.
B) 5 per 1000.
C) 5 per 100,000.
D) 1 per 1000.

Answer 2

5 per 1000.

Question 3

The condition that results from severing the anterior commissure is called _____.

A) anosmia
B) alexia
C) acopia
D) agraphia

Answer 3

anosmia

Question 4

Downer's experiment with monkeys involved lesions to the _____.

A) amygdala
B) visual cortex
C) hippocampal commissure
D) prefrontal cortex

Question 5

Preilowski (1975) performed an experiment in which he required commissurized patients to draw a diagonal line using the popular children's toy Etch A Sketch. What was being tested in this experiment?

A) artistic abilities
B) the ability to use both hands in concert
C) divergent thinking
D) spatial abilities

Question 6

Your patient can name odors presented to the left nostril but not to the right. You suspect damage to the _____.

A) corpus callosum
B) hippocampal commissure
C) anterior commissure
D) amygdalar commissure

Question 7

Geschwind hypothesized that individuals who show right - hand apraxia have damage to which region or regions of the brain?

A) the corpus callosum and the anterior commissure
B) the basal ganglia, especially the globus pallidus
C) the area that connects language areas and the motor cortex in the left hemisphere
D) the arcuate fasciculus and Broca's area

Question 8

Who further developed the Dejerine and Liepmann concept of "disconnexion syndromes"?

A) Sperry
B) Wernicke
C) Mishkin
D) Geschwind

Question 9

The _____ lobe has the fewest interhemispheric connections.

A) parietal
B) occipital
C) temporal
D) frontal

Question 10

Typically, if you placed a common object in his or her right hand, a blindfolded commissurotomy patient would:

A) not recognize the object.
B) identify the object by saying its name.
C) point to a matching object with his or her left hand only after the blindfold is removed.
D) identify the object by drawing a picture.

Question 11

The patients studied by Sperry and his colleagues had undergone commissurotomy as a radical treatment for _____.

A) schizophrenia
B) psychotic depression
C) epilepsy
D) Parkinson's disease

Question 12

Which of the following fiber pathways is considered a commissural pathway?

A) corpus callosum
B) amygdalar commissure
C) fornix
D) internal capsule

Question 13

_____ is the name of the aphasic syndrome that is the result of a disconnection between the anterior and posterior speech zones.

A) Conduction aphasia
B) Broca's aphasia
C) Wernicke's aphasia
D) Production aphasia

Question 14

Which sense has no crossed connections from the sense organ, and its interhemispheric connections are via the anterior commissure?

A) touch
B) balance
C) olfaction
D) audition

Question 15

The anterior portion of the corpus callosum is called the _____.

A) splenium
B) uncinate
C) rostrum
D) genu