Metacarpal Bones | Attachment |Articulation скачать в хорошем качестве

Metacarpal Bones | Attachment |Articulation

#anatomy #upperlimb #handbones #muscles #handmuscles #medicallectures #Regionalanatomy #handbones #metacarpals #carpals #metacarpalattachments #metacarpalarticulation #muscles #joints #phalanges #interosseousmuscle #bones Main Attachments of Metacarpals The main attachments from shaft of metacarpals are of palmar and dorsal interossei muscles. Palmar interossei arise from one bone each except the 3rd metacarpal . Dorsal interossei arise from adjacent sides of two metacarpals . The other attachments are listed below. 1st a. The opponens pollicis is inserted on the radial border and the anterolateral surface of the shaft. b. The abductor pollicis longus is inserted on the lateral side of the base. c. The first palmar interosseous muscle arises from the ulnar side of the base. 2nd a. The flexor carpi radialis is inserted on a tubercle on the palmar surface of the base. b. The extensor carpi radialis longus is inserted on the dorsal surface of the base . c. The oblique head of the adductor pollicis arises from the palmar surface of the base 3rd a. A slip from the flexor carpi radialis is inserted on the palmar surface of the base. b. The extensor carpi radialis brevis is inserted on the dorsal surface of the base, immediately beyond the styloid process. c. The oblique head of the adductor pollicis arises from the palmar surface of the base. d. The transverse head of the adductor pollicis arises from the distal two-thirds of the palmar surface of the shaft 4th Only the interossei arise from it . 5th a. The extensor carpi ulnaris is inserted on the tubercle at the base. b. The opponens digiti minimi is inserted on the medial surface of the shaft. Articulations at the Bases 1st : With the trapezium forms saddle-shaped joint. 2nd : With the trapezium, the trapezoid, the capitate and the 3rd metacarpal. 3rd : With the capitate and the 2nd and 4th metacarpals. 4th : With the capitate, the hamate and the 3rd and 5th metacarpals. 5th : With the hamate and the 4th metacarpal.