Muscles Of The Hand Thenar & Hypothenar Groups - Everything You Need To Know - Dr. Nabil Ebraheim скачать в хорошем качестве

Muscles Of The Hand Thenar & Hypothenar Groups - Everything You Need To Know - Dr. Nabil Ebraheim

Dr. Ebraheim’s educational animated video describes the muscle anatomy on the palm of the hand. The muscles of the hand are divided into three groups: 1-Thenar group: near the thumb 2-Hypthenar group: near the little finger 3-Muscles in the middle of the palm and between the metacarpal bone The thenar and hypothenar muscles are a mirror image of each other. The thumb is very mobile, therefore, the thenar muscles are very important. The two abductor muscles function as abductors. the two opponens muscles are deep and they function to oppose against the other fingers. Out of the two flexors, the flexor pollicis brevis is unique because of its dual nerve supply. Hypothenar group: •Abductor digiti minimi: arises from the pisiform bone, the pisohamate ligament and the flexor retinaculum. It is inserted into the medial side of the base of the proximal phalanx. It is an abductor of the little finger at the metacarpophalangeal joint. •Flexor digiti minimi: arises from the hook of the hamate bone as well as the flexor retinaculum and is inserted into the medial side of the base of the first phalanx of the little finger. The flexor digiti minimi flexes the proximal phalanx of the little finger. •Opponens digit minimi: arises from the hook of the hamate and the flexor retinaculum. It is inserted into the entire length of the metcarpal bone of the little finger. The opponens digiti minimi opposes the little finger. Thenar group •Abductor pollicis brevis: originates from the flexor retinaculum and the tubercle of the scaphoid bone. It is inserted into the lateral side of the base of the first phalanx of the thumb. The abductor pollici brevis is responsible for abduction of the thumb. •Flexor pollicis brevis: arises from the flexor retinaculum and the tubercle of the trapezium bone. It is inserted into the lateral side of the base of the proximal phalanx of the thumb. The flexor pollici brevis flexes the thumb at the metacarpophalangeal joint. The flexor pollici brevis has both superficial part and a deep part. •Opponens pollicis: opponens pollicis originates from the flexor retinaculum of the hand and the tubercle of the trapezium and it is inserted into the entire length of the metacarpal bone of the thumb. The opponens pollicis is a deep muscle and it opposes the thumb against the other fingers. Innervation •Hypothenar group is innervated by the deep branch of the ulnar nerve. •The thenar group is innervated by the recurrent branch of the median nerve. The ddep part of the flexor pollicis brevis is usually innervated by the deep branch of the ulnar nerve. Blood supply •The flexor pollicis brevis and the opponens pollicis receive their blood supply from the superficial palmar arch. Become a friend on facebook:   / drebraheim   Follow me on twitter: https://twitter.com/#!/DrEbraheim_UTMC