Hypothenar eminence

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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.)
Latin eminentia hypothenaris
Gray's p.546
Origin
Insertion    5th metacarpal and proximal phalynx
Artery ulnar artery
Nerve deep branch of ulnar nerve
Actions control movement of the 5th digit

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

The three muscles are:[1]

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

Muscles

The muscles of hypothenar eminence are from lateral to medial:

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, Adductor pollicis (thenar muscles), Opponens digiti minimi, Flexor digiti minimi, Abductor digiti minimi (Hypothenar muscles). [2]

Disorders

"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]

See also

References

  1. ↑ "Intrinsic Muscles of the Hand - Wheeless' Textbook of Orthopaedics". Retrieved 2008-01-16. 
  2. ↑ "Medical mnemonics". LifeHugger. 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. 

External links

Muscles of upper limbs (TA A04.6, GA 4.432)
Shoulder
fascia:
Arm
(compartments)
anterior
posterior
fascia
other
Forearm
anterior
superficial:
deep:
posterior
superficial:
deep:
fascia
other
Hand
lateral volar
medial volar
intermediate
fascia
posterior:
anterior:

M: MUS, DF+DRCT

anat (h/n, u, t/d, a/p, l)/phys/devp/hist

noco (m, s, c)/cong (d)/tumr, sysi/epon, injr

proc, drug (M1A/3)


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