An OT Practitioner Is Testing Thumb Interphalangeal (IP)flexion Strength

question 4

Multiple Choice

An OT practitioner is testing thumb interphalangeal (IP) flexion strength.The therapist definitely observes flexion of the IP joint but cannot palpate a contraction of the flexor pollicis longus (FPL) .What is the most likely reason?

• A) The FPL may be too weak to palpate.
• B) The client is giving less than maximal effort.
• C) The flexor pollicis brevis may be substituting.
• D) The extensor pollicis longus may be substituting.

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