Interossei

Question 1

Innervation of interossei

Answer 1

Ulnar nerve

Question 2

Origin of dorsal interossei

Answer 2

Lateral and medial surfaces of each metacarpal

Question 3

Attachment of dorsal interossei

Answer 3

Extensor hood and proximal phalanx of each finger

Question 4

Action of dorsal interossei

Answer 4

Abduct fingers at MCP joints

Question 5

Origin of palmar interossei

Answer 5

Medial and lateral surfaces of metacarpals

Question 6

Attachment of palmar interossei

Answer 6

Extensor hood and proximal phalanx of each finger

Question 7

Action of palmar interossei

Answer 7

Adduct the fingers at MCP joints

Question 8

How do interossei assist lumbricals

Answer 8

Assist in flexion at MCP joints and extension at IP joints

Question 9

Where are interossei

Answer 9

Between metacarpals

Question 10

Why is there no palmar interossei for the middle finger

Answer 10

It’s in the midline so can’t be adducted