Origin
Metacarpal bones.
Insertion
Proximal phalanges.
Blood supply
Palmar metacarpal artery.
Nerve supply
Ulnar nerve – deep branch.
Action
You use the muscles to bring the fingers together to from a fist.
Disease/Injury
Excessive typing can injure the palmar interossei.
Muscle Exercise
Finger abduction exercise must be performed to strengthen the palmar interossei. A rubber band is worn around all the fingers. The fingers are then spread apart against the resistance offered by the rubber band. Hold for a few seconds and then bring fingers back to their original position. Do 10 repetitions.
Interesting facts
In painful handshakes, it’s actually the interosseous muscles that are hurting.
