hello everyone this is my fifth video on motor system examination today i am going to tell you how to assess the muscle power of hand and fingers muscle in first four video i have already covered how to assess the posture bulk and the tone and the muscle power of the neck shoulder elbow and the wrist movement for assessment of hand and fingers muscle power we have to perform the movements at the finger as a flexion extension adduction abduction of the fingers and a position of little finger so first is flexion of finger in this flexion at the metacarpophalanges joint proximal and the distal interphalanges joint should be assessed for assessment of flexion of finger we have to keep the forearm supinated palma position and the finger should be extended and we will tell the child to flex the finger at metacarpal phalanges proximal interphalanges and the distal interphalanges joint and for against resistance we will keep our finger over the joint so the muscle for the flexion at the distal interphalanges joint by the fdp muscle flexor digitorum profundus and there are two heads of fdp radial head and ulnar head now supply to the radial head is by anti-atrocious branch of the median now and ulnar head of the fdp by the ulnar now now the flexion at the proximal interphalanges joint of the finger by the fds muscle flexor digitorum superficialis it also flexes the mcp joint metacarpophalanges joint ultimately it helps in flexion at the wrist also it is supplied by the main trunk of the media now ca to t1 now the flexion at the metacarpophallenges joined by the intros i and lumbricans which is supplied by the ca to t1 deep palmer branch of ulnar also we have to tell the child to make the fist whenever child will make a fist there will be flexion of finger at the metacarpal phalanges and interphalangeal joint also thumb flexion to grasp the finger and slight wrist extensor also work whenever child will make the fist now the extension of finger for this we will keep the forearm of the child pronated and hand should be out stretched and we will keep our hand over the finger to push it downward and we will tell the child to resist the finger flexion at the metacarpophalanges joint so the muscle for the extension of fingers are edc eip and edm edc extensor digitorum communist it extend the mcp joint eip extensor indices proprious it extends the index finger and edm extensor digiti minimi it extends the little finger and all these three nouns are supplied by the posterior atrocious branch of radial now c7 to c8 and intro shy and lumbricans extend the interphalanges joint both proximal and distal interphalangeas joint now for the adduction of finger we will tell the child to bring the finger tightly together or we will give the paper to the child to hold it between two finger and the muscle for the adduction are volar or palmar intrusion now for the abduction of finger first we will tell the child to split the finger apart and for the against resistance we will give the adduction force and child will try to abduct the fingers and the muscle for the abduction are dorsal intrusion except for the little finger for which the muscle is abductor digitized minima now for the opposition of little finger we will tell the patient to move the extended little finger toward the thumb and the muscle for the opposition of little finger is opponents digitize minimize supplied by the ulna now ca2 t1 so this is the way to assess the muscle power of hand and fingers in next video i will explain how to assess the muscle power of thumb muscle thank you so much