Amedco - Quiz
SBRT for OCD and Essential Tremors
1 - What is the target site for stereotactic radiosurgery of essential tremor?
A - Ipsilateral ventral intermediate nucleus of the thalamus
B - Contralateral ventral Intermediate nucleus of the thalamus
C - Ipsilateral anterior limb of internal capsule
D - Contralateral anterior limb of the internal capsule
E - Bilateral anterior limb of the internal capsule
2 - What is the typical prescribed dose for stereotactic radiosurgery of essential tremor?
A - 100 Gy to 100% isodose point
B - 150 Gy to 50% isodose line
C - 130 Gy to 100% isodose point
D - 130 Gy to 50% isodose line
E - 80 Gy to 100% isodose point
3 - According to the International Stereotactic Radiosurgery Society systematic review for tremor, what was the mean improvement in tremor after stereotactic radiosurgery?
A - 20%
B - 44%
C - 50%
D - 66%
E - 88%
4 - What is the typical radiosurgical target to treat severe, refractory OCD?
A - Bilateral subthalamic nucleus
B - Unilateral cingulate cortex
C - Bilateral anterior commissure
D - Bilateral anterior limb of internal capsule
E - Unilateral posterior limb of internal capsule
5 - Which of the following is a rare but dangerous complication of SRS for OCD that can arise months or years following treatment as a consequence of radionecrosis?
A - Neuropathic pain syndrome
B - Frontal lobe syndrome
C - Locked-in syndrome
D - Cerebellar mutism syndrome
E - Supplementary motor syndrome
6 - According to the International Stereotactic Radiosurgery Society systematic review for tremor, what was the mean time to response after stereotactic radiosurgery?
A - 1 month
B - 2.4 months
C - 4.8 months
D - 7.2 months
E - 1 year
7 - What is the approximate time frame over which a patient with severe, refractory OCD may notice symptom improvement following Gamma Knife ventral capsulotomy?
A - Minutes to hours
B - Hours to days
C - Days to weeks
D - Weeks to months
E - Months to years
8 - Who is credited with developing stereotactic radiosurgery and performing the first procedures?
A - Ernest Spiegel
B - Henry Wycis
C - Jean Talairach
D - Lars Leksell
E - Walter Freeman
9 - What is the approximate percentage of patients with severe, refractory OCD who show long-term response to Gamma Knife capsulotomy according to open-label trials in the past 3 decades?
A - 0-10%
B - 20-30%
C - 50-60%
D - 70-80%
E - 90-100%
10 - Gamma Knife thalamotomy for tremor is typically performed unilaterally, contralateral to the most affected or dominant hand. What are the potential complications that have dissuaded clinicians from performing bilateral procedures?
A - Truncal instability and speech problems
B - Somatosensory deficits and hearing loss
C - Memory loss and cognitive dysfunction
D - Alexia and agraphia
E - Vision loss and perceptual difficulties
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