A 39-year-old male cyclist presents with numbness of the little finger and medial half of the ring finger following a 6-hour race. Vital signs are stable (BP 128/76, HR 82, RR 16, Temp 37°C). Examination reveals weakness of finger abduction and adduction with preserved wrist extension. Nerve conduction studies show prolonged distal latency across the elbow. Sensory examination of the lateral hand is intact. Which nerve is most likely affected?
- A)Median nerve
- B)Ulnar nerveGABARITO
- C)Radial nerve
- D)Long thoracic nerve
- E)Axillary nerve
Explicação
The ulnar nerve supplies most intrinsic hand muscles and sensation to the medial one and a half digits. Compression at the elbow or Guyon canal can cause numbness in the little finger and weakness of finger abduction and adduction. Ver explicação completa e trilha adaptativa →