NEURO-logis

Question 1

Clinical findings in parietal lobe syndromes:

Answer 1

Agraphesthesia—letters or numbers written on the palm of the
hand are not recognized.
## Astereognosis—objects placed in the palm of the hand are not
recognized.
## Loss of two-point tactile discrimination—as stimuli are presented
closer and closer, there is loss of appreciation of two discrete stimuli.
## Extinction—sensory stimuli are presented bilaterally and simultaneously,
yet not perceived on the side opposite a parietal lesion.

Question 2

Classical findings associated with nondominant parietal lobe lesions:

Answer 2

Asomatognosia—inability to recognize one’s own body parts on the
affected side and to localize them in space.
## Dressing apraxia—inability to properly arrange clothing on oneself.
## Constructional apraxia—inability to draw or copy diagrams.
## Geographic disorientation—inability to form a conceptual map of
an area.

Question 3

Classical findings associated with dominant parietal lobe lesions:

Answer 3

The Gerstmann syndrome is a tetrad of deficits associated with dominant
parietal lobe lesions.
## Right–left confusion—the patient can no longer recognize left versus
right.
## Finger agnosia—the patient is not able to name or differentiate the
fingers.
## Acalculia—loss of arithmetic skills.
## Agraphia—loss of writing skills.

Question 4

Stroke destroys one frontal eye field (right) … what happens?

Answer 4

the other (left) eye field id unopposed and results in right tonic eye deviation and loss of gaze to the left. This is known as a right gaze preference or left gaze palsy.

gaze deviation following a cortical stroke where the eyes look toward the infarcted side.

Question 5

Seizures may stimulate one eye field (right) resulting in….

Answer 5

left tonic eye

deviation.

Question 6

## A brainstem stroke in the region of the CN VI nucleus may also
result in eye deviation. which side?

Answer 6

## A brainstem stroke in the region of the CN VI nucleus may also result in eye deviation, but this time ipsiversive gaze (i.e., toward the same side) is lost, and hence the eyes look away from the brainstem
stroke.

Question 7

CN IX receives bilateral or unilateral SUPRANUCLEAR innervation?

Answer 7

bilateral