L2 nerve root compression would cause which of the following reflex abnormalities?

Correct Answer: B

Rationale: The correct answer is B: Cremasteric reflex. L2 nerve root compression affects the genitofemoral nerve, leading to loss of the cremasteric reflex. The cremasteric reflex is elicited by stroking the inner thigh, causing the ipsilateral testicle to elevate. This reflex is absent in L2 nerve root compression due to disruption in the sensory or motor pathways. Choices A, C, and D are incorrect as they are associated with different nerve roots and reflexes not affected by L2 compression.

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: A

Rationale: The correct answer is A: Marked wrist and finger drop. In Saturday night palsy, there is compression of the radial nerve, leading to weakness of the wrist and finger extensors. This results in the characteristic presentation of wrist and finger drop. Choice B is incorrect as atrophy of the APB is seen in carpal tunnel syndrome. Choice C is incorrect as weak elbow extension is not a typical finding in Saturday night palsy. Choice D is incorrect as painless weakness and atrophy of hand intrinsic muscles are more indicative of ulnar nerve compression.

Correct Answer: D

Rationale: The correct answer is D because diplopia with one eye covered suggests a problem with the affected eye itself, such as an irregularity in the cornea or lens causing refractive errors. Weakness of CN III (A) would cause eye movement issues, not diplopia with one eye covered. Weakness of CN IV (B) would result in vertical diplopia, not diplopia with one eye covered. A lesion of the brainstem (C) can lead to various oculomotor issues but wouldn't specifically cause diplopia with one eye covered.

Correct Answer: C

Rationale: The correct answer is C: Ureteral stone. The progression of pain from under the lower ribs to the lateral abdomen and then to the right lower quadrant is characteristic of a ureteral stone passing from the kidney towards the bladder. This pattern is known as "Loin to groin pain." Appendicitis typically presents with pain starting in the right lower quadrant without a gradual progression. Dysmenorrhea involves cramping pelvic pain related to menstruation. Ovarian cyst pain is usually localized to the lower abdomen and may not follow the described pattern.