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First dorsal interosseous at rest
First dorsal interosseous in 2nd digit abduction
Dorsal interossei (hand)
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Related Anatomy
Nerve
Ulnar nerve
Deep branch (of ulnar nerve)
Plexus
Brachial plexus
Muscle Group
Ulnar nerve - Intrinsic hand group
Muscle Action
Finger abduction (finger spread)
Nerve Root
T1
C8
Brachial Plexus Trunk
Lower trunk
Brachial Plexus Cord
Medial cord
Related Tutorials
Hypothenar and Central Hand Muscles
Interossei Hand Muscles
Thenar and Adductor Hand Muscles