What is the action of the dorsal interossei muscle on the third finger when the metacarpo phalangeal joint (MCP) is extended?
A)Metacarpo phalangeal abduction
B)Metacarpo phalangeal flexion
C)Metacarpo phalangeal abduction and interphalangeal extension
D)Metacarpo phalangeal flexion and interphalangeal extension

Question

Quizplus · Accepted Answer

The dorsal interossei muscle acts on the third finger to produce metacarpo phalangeal abduction and interphalangeal extension when the MCP joint is extended.
Metacarpo phalangeal abduction is produced by the dorsal interossei on the first finger when the MCP joint is extended.
Metacarpo phalangeal flexion is produced by the dorsal interossei on the first finger when the MCP is flexed.
Metacarpo phalangeal flexion and interphalangeal extension are produced by the dorsal interossei on the second finger when the MCP is flexed.

What Is the Action of the Dorsal Interossei Muscle on the Third