The purpose of this study was firstly, to describe a simple clinical tool that can be used to measure the extensibility of the flexor pollicis longus (FPL) muscle; secondly, to test its ...

The expanded label will now include the addition of two thumb muscles: flexor pollicis longus and adductor pollicis.

The expanded indication now adds two thumb muscles: the flexor pollicis longus, a forearm muscle that flexes the thumb, and the adductor pollicis, a hand muscle that adducts the thumb.