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.

[@UKKhan54]

Thank you so much sir!!

[@medlecto5507]

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