Common Brain Lesions

Question 1

Klüver-Bucy syndrome—disinhibited
behavior (e.g., hyperphagia, hypersexuality,
hyperorality).

Answer 1

Amygdala (bilateral)

Question 2

Disinhibition and deficits in concentration,
orientation, judgment; may have reemergence
of primitive reflexes.

Answer 2

Frontal Lobe

Question 3

Hemispatial neglect syndrome (agnosia of the

contralateral side of the world).

Answer 3

Nondominant parietal-temporal cortex

Question 4

Reduced levels of arousal and wakefulness (e.g.,

coma)

Answer 4

Reticular activating system (midbrain)

Question 5

Wernicke-Korsakoff syndrome—confusion,
ophthalmoplegia, ataxia; memory loss
(anterograde and retrograde amnesia),
confabulation, personality changes.

Answer 5

Mammillary bodies (bilateral)

Question 6

May result in tremor at rest, chorea, athetosis

Answer 6

Basal ganlgia

Question 7

Intention tremor, limb ataxia, loss of balance;
damage to cerebellum –> ipsilateral deficits;
fall toward side of lesion

Answer 7

Cerebellar hemisphere

Question 8

Truncal ataxia, dysarthria.

Answer 8

Cerebellar vermis

Question 9

Anterograde amnesia—inability to make new

memories.

Answer 9

Hippocampus (bilateral)

Question 10

Eyes look away from side of lesion

Answer 10

Paramedian pontine reticular formation

Question 11

Eyes look toward lesion

Answer 11

Frontal eye fields