ATI RN
Pediatric Musculoskeletal Disorders NCLEX Questions Questions
Question 1 of 5
Matching: Absent deep tendon reflexes
Correct Answer: A
Rationale: Polyneuropathy (e.g., Guillain-Barré) commonly causes absent deep tendon reflexes due to peripheral nerve involvement. Myopathy spares reflexes; neuromuscular junction defects (e.g., myasthenia) don't typically affect reflexes; upper motor neuron defects cause hyperreflexia.
Question 2 of 5
A 10-year-old female has had diplopia and ptosis and weakness of her neck flexors for 2 months. Symptoms are worse in the evening and are usually partially improved on awakening in the morning. She has no fasciculations or myalgias, and her deep tendon reflexes are 1-2+. The most likely diagnosis is
Correct Answer: D
Rationale: Myasthenia gravis causes fatigable weakness (worse in evening), ptosis, diplopia, and neck weakness, with preserved reflexes. Other options lack fatigability or ocular symptoms.
Question 3 of 5
Which is not associated with constant muscle weakness?
Correct Answer: D
Rationale: All can cause weakness: hypothyroidism (myopathy), hyperparathyroidism (proximal weakness), corticosteroids (steroid myopathy), hyperaldosteronism (hypokalemia-related). Assuming intent, all are true, so E (moved to D) is least specific.
Question 4 of 5
Which is the earliest and most consistent sign of myasthenia gravis?
Correct Answer: C
Rationale: Ptosis and extraocular muscle weakness are the earliest and most consistent signs of myasthenia gravis due to ocular muscle involvement.
Question 5 of 5
Normal full-term newborns can have up to 20-30 degree hip and knee flexion contractures, these contractures tend to resolve by
Correct Answer: B
Rationale: In full-term newborns, mild hip and knee flexion contractures are normal due to in utero positioning and typically resolve by 4-6 months as the infant begins to move and stretch the joints.