The compression of the median nerve within the carpal canal of the wrist and the progression of symptoms resulting from this entrapment is known as carpal tunnel syndrome (CTS).

In the human body, the carpal tunnel or carpal canal is the passageway on the palmar side of the wrist that connects the forearm to the middle compartment of the deep plane of the palm.

Deep digital flexor: 3 tendons of the deep digital flexor muscle travel distally and join at the carpus, were they pass through the carpal canal, and travel distally along the back of the leg, finally inserting into the palmar side of the third phalanx.