LUMBRICALS OF THE HAND :

LUMBRICALS MUSCLES

 

LUMBRICALS OF HAND :

 

 

There are four of these small, worm-like muscles on both hand. These muscles are
unusual in that they do not attach to bone. Instead, they attach proximally to
the tendons of flexor digitorum profundus and distally to the extensor expansions.

 

 

LUMBRICALS MUSCLES

LUMBRICALS MUSCLES

 

ORIGIN : flexor digitorum profundus

 

INSERTION : extensor expansion

 

LUMBRICALS OF THE HAND

LUMBRICALS OF THE HAND

 

NERVE SUPPLY : 1st and 2nd branch of median nerve
and 3rd and 4th branch of ulnar nerve
[ for index and middle finger, median nerve]
[and for ring and small finger, ulnar nerve]

 

ACTION/EXERCISE : flexion of metacarpophalangeal joint
and extension of interphalangeal joint

 

LUMBRICALS ACTION

LUMBRICALS ACTION

 

BLOOD SUPPLY OF LUMBRICALS :
There are four separate sources of blood supply for seprate muscle:

1]  the superficial palmar arch,
2]  the common palmar digital artery,
3]  the deep palmar arch,and
4]  the dorsal digital artery.