Hypothenar eminence
| Hypothenar eminence | |
|---|---|
 |
|
| The mucous sheaths of the tendons on the front of the wrist and digits. (Hypothenar eminence labeled at center right.) | |
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| Transverse section across the wrist and digits. (Muscles of little finger labeled at upper right.) | |
| Latin | eminentia hypothenaris |
| Gray's | subject #126 546 |
| 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]
Muscles
The muscles of hypothenar eminence are from lateral to medial:
- 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, 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]
References
- ^ "Intrinsic Muscles of the Hand - Wheeless' Textbook of Orthopaedics". Retrieved 2008-01-16.
- ^ "Medical mnemonics". LifeHugger. Retrieved 2009-12-19.
- ^ 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
- -1214644166 at GPnotebook
- EatonHand mus-083
- SUNY Figs 08:04-07
- Slides
- lesson5mus&tendonsofhand at The Anatomy Lesson by Wesley Norman (Georgetown University)
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