MUSCLE OF THE HAND 

a) THENAR MUSCLE :-

1) Abductor policis brevis

2) Flexors policies brevis

3) Opponent policies

4) Adductor policies

ABDUCTOR POLLICIS BREVIS

ORIGIN: flx.retinaculum, tubercle of scaphoid, trapezium

INSERTION: lat.side of the base of the prox.phalax of the thumb

ACTION: abduction at carpometacarpal,MP joints

NERVE SUPPLY : recurrent br.of median.n (c8t1)

FLX.POLLICIS BREVIS

ORIGIN: 

superficial heads suf.head: flx.retinaculum & trapezium bone
Deep head: floor of carpal canal overlies the
trepezoid,capitate

INSERTION: lateral side of the 1st metacarpal bone and base of the prox phalanx

ACTION: flexes the prox.phalanx of the thumb at MCP and med.rotation at carpometacarpal joint

NERVE SUPPLY :

SEPERFICIAL HEAD: median.n (c8,t1)

DEEP HEAD: Deep Br.Of Ulnar Nerve

OPPONENS POLLICIS

ORIGIN: flex.retinaculum, trapezium bone

INSERTION : lat.half of the palmar surface of the 1st metacarpal bone

ACTION: oppositioin of thumb in combination of flexion and med.rotation

NERVE SUPPLY : Media.N (C8,t1)

ADDUCTOR POLLICIS

ORIGIN: 2heads oblique head : bases of 2nd 3rd
metacarpals and capitate bone Transverse head: anterior surface of 3rd metacarpal bone

INSERTION: base of
prox.phalanx of the thumb

ACTIONS: adducts tha prox.phalanx of the thumb

NERVE SUPPLY :
Deep Branch of ulnar nerve 
(C8, T1)

b) HYPOTHENAR MUSCLE :-

1) Abductor digiti minimi

2) Flexor digiti minimi

3) Opponent digiti minimi

ABDUCTOR DIGITI MINIMI

ORIGIN: pisiform bone,the tendon of the flx.carpi ulnaris

INSERTION :medial side of the base of the prox.phalanx of the 5th digit

ACTION: abducts th 5th digit

NERVE SUPPLY : Deep Br.Of Ulnar .N (C8,t1)

FLX.DIGITI MINIMI

ORIGIN : hook of hamate,flx.retinaculum

INSERTION :medial aspect of the base of the prox.phalanx of little finger

ACTION: flex theprox phalanx of 5th digit at MCP joint

NERVE SUPPLY : Deep Br. Of Ulnar.N (C8,T1)

OPPONENS DIGITI MINIMI

ORIGIN: hook of hamate, flx.retinaculum

INSERTION: body of the 5th metacarpal.

ACTION: abducts, flexion,lat.rotates the 5th metacarpal

NERVE SUPPLY : deep br.of ulnar.N (C8,T1)

C) LUMBRICALS (four muscle)

LUMBRICALS

ORIGIN: 1&2 lumbrical arise from the 2 lateral tendon of th flx.digitorum profundus. 2&4 arises from the medial tendons of the flx.digitorum profundus

INSERTION : lateral side of the ext.expansion of medial 4 digits.

ACTION: flex the MCP, extends the IP

NERVE SUPPLY :
1&2 lumbrical- Median Nerve (C8,t1)
3&4 lumbrical- Deep Br.OfUlnar nereve(c8,t1)

D) PALMAR INTERROSEI(four muscle)

ORIGIN: palmar interossei arises from palmar surface of the metacarpal bones of 2,4,5 digits

INSERTION: extensor expansion of the digit and bases of the prox.phalanx of the 2,4,5 digits

ACTION: AddutsThe Fingers At MCP, assists flexion at MCP, extension at IP

NERVE SUPPLY : deep branch Of unlar Nerve (C8,T1)

E) DORSAL INTERROSEI (four muscle)

ORIGIN: adjacent sides of the metacarpal bones

INSERTION: base of the proximal phalanx 

ACTION: abducts the fingers, flex the MCP

NERVE SUPPLY : Deep Branch Of Ulnar nerve (C8,t1)