Articulations of the Digits

From WikiMD free wellness and medical encyclopedia
Jump to: navigation, search

Anatomy > Gray's Anatomy of the Human Body > III. Syndesmology > 6k. Articulations of the Digits

Henry Gray (1821–1865). Anatomy of the Human Body. 1918.

6k. Articulations of the Digits

(Articulationes Digitorum Manus; Interphalangeal Joints) (Figs. 337, 338)


The interphalangeal articulations are hinge-joints; each has a volar and two collateral ligaments. The arrangement of these ligaments is similar to those in the metacarpophalangeal articulations. The Extensor tendons supply the place of posterior ligaments.

Movements—The only movements permitted in the interphalangeal joints are flexion and extension; these movements are more extensive between the first and second phalanges than between the second and third. The amount of flexion is very considerable, but extension is limited by the volar and collateral ligaments.

Muscles Acting on the Joints of the Digits—Flexion of the metacarpophalangeal joints of the fingers is effected by the Flexores digitorum sublimis and profundus, Lumbricales, and Interossei, assisted in the case of the little finger by the Flexor digiti quinti brevis. Extension is produced by the Extensor digitorum communis, Extensor indicis proprius, and Extensor digiti quinti proprius. Flexion of the interphalangeal joints of the fingers is accomplished by the Flexor digitorum profundus acting on the proximal and distal joints and by the Flexor digitorum sublimis acting on the proximal joints. Extension is effected mainly by the Lumbricales and Interossei, the long Extensors having little or no action upon these joints. Flexion of the metacarpophalangeal joint of the thumb is effected by the Flexores pollicis longus and brevis; extension by the Extensores pollicis longus and brevis. Flexion of the interphalangeal joint is accomplished by the Flexor pollicis longus, and extension by the Extensor pollicis longus.


Gray's Anatomy Contents | Gray's Anatomy Subject Index

About Classic Gray's Anatomy

External Links

WikiMD Sponsors: W8MD Weight Loss, Sleep & Medical Aesthetics


W8MD weight loss

Tired of being overweight or obese? W8MD's insurance weight loss program can HELP

  • W8MD IV Nutrition: Our IM and IV nutrition therapy includes booster shots for B12, vitamin B complex, Vitamin C, Detox treatments and IV nutrition therapy. learn more…
W8MD weight loss locations: Philadelphia weight loss | King of Prussia, PA weight loss | NYC weight loss | NJ weight loss

Medical Aesthetics

Contact us (718) 946-5501 | Why advertise on WikiMD?


Disclaimer: The entire contents of WIKIMD.ORG are for informational purposes only and do not render medical advice or professional services. If you have a medical emergency, you should CALL 911 immediately! Given the nature of the wiki, the information provided may not be accurate and or incorrect. Use the information on this wiki at your own risk! See full Disclaimers.WikiMD is supported by W8MD Weight loss, Poly-Tech Sleep & Medical Aesthetic Centers of America.