Hypothenar eminence

The hypothenar muscles are a group of three muscles of the palm that control the motion of the little finger.

Carpal tunnel and thenar and hypothenar eminences
Hypothenar eminence
The mucous sheaths of the tendons on the front of the wrist and digits. (Hypothenar eminence labeled at center right.)
Transverse section across the wrist and digits. (Muscles of little finger labeled at upper right.)
Details
Insertion5th metacarpal and proximal phalynx
Arteryulnar artery
Nervedeep branch of ulnar nerve
Actionscontrol movement of the 5th digit
Identifiers
Latineminentia hypothenaris
TAA01.2.07.024
FMA61523
Anatomical terms of muscle

The three muscles are:[1]

  • Abductor digiti minimi
  • Flexor digiti minimi brevis
  • Opponens digiti minimi

Structure

The muscles of hypothenar eminence are from medial to lateral:

The intrinsic muscles of hand can be remembered using the mnemonic, "A OF A OF A" for, Abductor pollicis brevis, Opponens pollicis, Flexor pollicis brevis (the three thenar muscles), Adductor pollicis, and the three hypothenar muscles, Opponens digiti minimi, Flexor digiti minimi brevis, Abductor digiti minimi.[2]

Clinical significance

"Hypothenar atrophy" is associated with the lesion of the ulnar nerve, which supplies the three hypothenar muscles.

Hypothenar hammer syndrome is a vascular occlusion of this region.[3]

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See also

References
  1. "Intrinsic Muscles of the Hand - Wheeless' Textbook of Orthopaedics". Retrieved 2008-01-16.
  2. "Medical mnemonics". LifeHugger. Archived from the original on 2011-07-13. Retrieved 2009-12-19.
  3. Cooke RA (2003). "Hypothenar hammer syndrome: a discrete syndrome to be distinguished from hand-arm vibration syndrome". Occup Med (Lond). 53 (5): 320–4. doi:10.1093/occmed/kqg071. PMID 12890831.
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