Phalanges of upper limb

Phalanges of upper limb

1. Phalanges of upper limb Prepared by- Sanju Sah St. Xavier’s college, Maitighar , Kathmandu Department of Microbiology

2. Fingers and thumbs contains 14 bones, called phalanges Both hands have 28 bones Mesodermal in origin N amed after the ancient Greek phalanx (a rectangular block of soldiers), plural form is phalanges Location Phalanges are digital bones in both the hands One end of each is attached to the palm of your hand, and the other end is free

3. Structure

4. Its structure is designed to support long digits of human body  The standard digital formula of a phalange is said to be 2+3+3+3+3 Digital formula started from thumb Each digits of finger have three phalanges except thumb Thumb has only two phalanges Phalanges of firs digit is smaller than other fingers

5. Each phalax has a base proximally, a shaft(body) and a head distally The proximal phalanges are the largest, the middle one is intermediate and the distal one is smallest. The shafts of the phalanges taper distially The terminal phalanges are flattened and expanded at their distal ends, which underlie the nail beds

6. These phalanges are connected with muscles of the palm and forearm Articulation An  inter- phalangeal joint is one of the articulations between adjacent phalanges of the digits

7. Function The phalanges support the basic framework of the digits  Majority of voluntary living functions are performed such as tool making, grasping things, or crafting things

8. Clinical significance Facture to phalanges leads to immobilization which is treated by Plaster of P aris bandage References Gray H: Anatomy of the Human Body. Philadelphia: Lea & Febiger , 1918; Bartleby.com, 2000 www.bartleby.com/107/ [July 18, 2003] 9, Pp:680 Rose and wilson , Anatomy and Physiology, 11 th edition, Reprinted in 2011 , Pp: 398.

9. Thank you