anatomy and physiology mcqs

Question #117

Which of the following inserts into the distal phalanx of the thumb?



The distal phalanx of the thumb has two muscular insertions:

  1. Flexor pollicis longus
  2. Extensor pollicis longus

The proximal phalanx of the thumb has five muscular insertions:

  1. First dorsal interosseous muscle
  2. Adductor pollicis
  3. Extensor pollicis brevis
  4. Flexor pollicis brevis
  5. Abductor pollicis brevis

Remember there is no middle phalanx of the thumb.

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