Initial Case Presentation

A 30-year-old right-handed male presents to the outpatient neurology clinic complaining of weakness in his right hand that has progressively interfered with his daily activities and fine motor tasks. He notes difficulty gripping everyday items, turning keys, and buttoning his shirt. He does not initially report overt systemic illness, recent blunt limb trauma, fever, or rash, but is notably distressed by the functional deficit in his dominant hand.

Clinical Examination Findings

General physical examination reveals a healthy appearance without systemic distress. Cranial nerve assessment is entirely normal, including symmetry of facial movements, extraocular mobility, and sensory distribution across trigeminal distributions.

Detailed motor evaluation demonstrates marked right distal upper limb weakness. Power testing reveals weakness in right wrist extension (Medical Research Council [MRC] grade 4/5), right finger extension (MRC grade 3/5), and right thumb abduction (MRC grade 4/5). Sensory examination demonstrates preserved light touch and pinprick throughout the digits and palm, without dermatomal dissociation. Deep tendon reflexes in the upper extremities show a depressed right brachioradialis reflex (1+), while the right biceps (2+) and triceps (2+) reflexes remain symmetric and preserved.

Problem-Based Learning Questions

This problem-based learning project is structured for multicenter clinical collaboration, anatomical consensus, and educational dissemination under Annals of Curiosity in Scholarly Communication. Researchers and clinicians contributing to this module will participate in protocol synthesis and manuscript submission.