Origin
Trapezium, transverse carpal ligament.
Insertion
Into the metacarpal bone of the thumb.
Blood supply
Superficial palmar arch.
Nerve supply
Median nerve.
Action
The muscle allows the tip of the thumb to touch the tips of other fingers and as in grasping an object.
Disease/Injury
Holding an object like pen or a brush for a longer time leads to pain in thumb.
Muscle Exercise
Thumb opposition: Hold one of your hands in front of you. Touch your thumb to each of the fingers in order, squeezing each of them for a few seconds. Repeat with the other hand.
Interesting facts
The muscle forms the fleshy pad at the base of your thumb.
