Question
The test shown in the image below is used to test the function of which of the following muscle
| A. |
Adductor Pollicis
|
| B. |
Abductor Pollicis longus
|
| C. |
Flexor Pollicis longus
|
| D. |
Extensor Pollicis longus
|
Show Answer
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Correct Answer � C
Explanation
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|
Answer C) Flexor Pollicis longus
Flexor pollicis longus (FPL)
- The flexor pollicis longus (FPL) is a long muscle located at the deep layer with flexor digitorum profundus and pronator quadratus in the anterior compartment of the forearm.
- Though it is situated at the forearm, it is classified as part of the extrinsic muscles of the hand as it’s function is seen in thumb movement.
- It is innervated by the median nerve via the anterior interosseous nerve (7th and 8th cervical nerve root).
Functions:
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The FPL mainly flexes the interphalangeal joint of the distal phalanx of the thumb.
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It also serves as accessory flexors of the metacarpophalangeal of the proximal phalanx and carpometacarpal joints of the first metacarpal.
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It may also assist in wrist joint flexion
