Biology:Hypothenar eminence
From HandWiki
Short description: Group of three muscles of the palm
| 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 | |
| Insertion | 5th metacarpal and proximal phalynx |
| Artery | ulnar artery |
| Nerve | deep branch of ulnar nerve |
| Actions | control movement of the 5th digit |
| Identifiers | |
| Latin | eminentia hypothenaris |
| Anatomical terms of muscle | |
The hypothenar muscles are a group of three muscles of the palm that control the motion of the little finger.
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:
- Opponens digiti minimi
- Flexor digiti minimi brevis
- Abductor digiti minimi
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]
See also
- Thenar eminence
- Palmaris brevis
References
- ↑ "Intrinsic Muscles of the Hand - Wheeless' Textbook of Orthopaedics". http://www.wheelessonline.com/ortho/intrinsic_muscles_of_the_hand.
- ↑ "Medical mnemonics". LifeHugger. http://mc.lifehugger.com/moc/386/intrinsic-muscles-hand.
- ↑ 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
- Anatomy figure: 08:04-07 at Human Anatomy Online, SUNY Downstate Medical Center
- Slides
- lesson5mus&tendonsofhand at The Anatomy Lesson by Wesley Norman (Georgetown University)
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