Monday, 14 April 2014

Flexor Carpi Ulnaris : a wrist flexor muscle


Flexor: flexes       Carpi : wrist        Ulnaris: referring to the Ulna*

Official Attachment points!
ORIGIN(s): this muscle actually comes from two different spots close to the elbow:
a) common flexor tendon which attaches to the medial epicondyle of the humerus!
b) 'posterior surface of proximal half of ulnar shaft' (back of the elbow then half-way down the forearm - along the ulna) !
INSERTION: the muscle tendon continues and attaches onto a small wrist bone called the Pisiform**

*the ulna is one of two forearm bones - its the one on the pinky side!
** the Pisiform is that bump on the pinky side of the wrist > just above the wrist crease - can you feel it?

This muscle can help perform 3 different actions when contracted:

a) FLEXES the hand a the WRIST joint (aka wrist flexion)
b) ADDUCTS the hand aka ADDuction (tipping hand Towards the midline of the body as opposed to Away which would be ABDuction.
c) - also assists in FOREARM FLEXION because this muscle crosses the elbow joint.
If you want to FEEL your own FLEXOR CARPI ULNARIS: look at your hand - palm up >  locate the wrist bone PISIFORM (that bump on the pinky side of your wrist!) > slide your thumb OFF pisiform moving up the arm (ulnar side) WHILST ADDUCTING the hand > It is the act of Adduction that will contract and help you to feel FLEXOR CARPI ULNARIS !!