HiCortical Networks and Disconnection Sydromes

Question 1

Association Fibers

Answer 1

Fibers that connect distant and adjacent neocortical areas

Question 2

Projection Fibers

Answer 2

Ascending fibers to and from neocortex

Question 3

Comissural Fibers

Answer 3

Connect the two hemispheres

Question 4

Conduction Aphasia

Answer 4

Predicted by Wernicke

Result of severing fiber connections between the anterior and posterior speech centers

Question 5

Liepmann

Answer 5

Developed the theory of apraxia–> series of neocortical disconnections

Question 6

Comissurotomy

Answer 6

Surgical severing of cerebral commissures

Treatment for epilepsy

Question 7

Callosal Agenesis

Answer 7

Congenitally reduced or absent interhemispheric connections

When humans are born without a corpus callosum

Question 8

Of all the senses which system connections are not crossed

Answer 8

The olfactory system

Question 9

Anosmic

Answer 9

Lacking sense of smell

Question 10

What happens when you sever the anterior commissure?

Answer 10

Inability of the right nostril to name odors

Question 11

Where does visual stimuli in the right visual field travel?

Answer 11

To the left hemisphere

Question 12

Where does visual stimuli in the left visual field travel?

Answer 12

To the right hemisphere

Question 13

What happens to the vision system after a commissurotomy?

Answer 13

Info. is no longer shared

Question 14

Where do sensations in the left hand travel to?

Answer 14

The right hemisphere

Question 15

Where do sensations in the right hand travel to?

Answer 15

The left hemisphere

Question 16

What happens to somatosensory functions after commissurotomy?

Answer 16

They become independent

Question 17

Auditions

Answer 17

Has both cross and uncrossed sections

Question 18

What happens to the left ear after hemispheric disconnection?

Answer 18

Input to this ear is suppressed

Question 19

Movement

Answer 19

Largely crossed sections

Question 20

What happens to the posterior transection after partial disconnection?

Answer 20

Disruption of visual transfer

Somatosensory transfer affected

Question 21

What happens to the anterior transection after partial disconnection?

Answer 21

Motor Disturbance

Question 22

When does apraxia of the left hand appear?

Answer 22

When it is disconnected from the left hemisphere

Question 23

When does apraxia of the right hand appear?

Answer 23

When there is a disconnection between the verbal center in the left hemisphere and the motor cortex in the left hemisphere

Question 24

Contralateral Neglect

Answer 24

Damage to the right parietotemporal junction

White matter damage