Abductor Pollicis Brevis

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Abductor Pollicis Brevis

Last updated on Friday, April 10 2009 by blondarb

Name: Abductor pollicis brevis

Abbreviation: APB

AKA:

Nerve: Median

Cord: Medial

Division: Anterior

Trunk: Lower

Root: C8, T1

Insertion: lateral approach to the base of the thumb, insert 1-2 cm in depth

Action: Abducts the thumb

Activation: Patient moves thumb perpindicular awas from the palm.

Pitfalls: Painful; If sampled too deeply the needle enters the opponens pollicis.

Related videos:

Abductor Pollicis Brevis - EMG Demo
A demonstration of the needle placement and activation technique in an EMG study of the abductor pollicis brevis (APB) muscle