Interossei Flashcards
1
Q
Innervation of interossei
A
Ulnar nerve
2
Q
Origin of dorsal interossei
A
Lateral and medial surfaces of each metacarpal
3
Q
Attachment of dorsal interossei
A
Extensor hood and proximal phalanx of each finger
4
Q
Action of dorsal interossei
A
Abduct fingers at MCP joints
5
Q
Origin of palmar interossei
A
Medial and lateral surfaces of metacarpals
6
Q
Attachment of palmar interossei
A
Extensor hood and proximal phalanx of each finger
7
Q
Action of palmar interossei
A
Adduct the fingers at MCP joints
8
Q
How do interossei assist lumbricals
A
Assist in flexion at MCP joints and extension at IP joints
9
Q
Where are interossei
A
Between metacarpals
10
Q
Why is there no palmar interossei for the middle finger
A
It’s in the midline so can’t be adducted
