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A total of nine flexor tendons (not the muscles themselves) pass through the carpal tunnel: 1  flexor digitorum profundus (four tendons) 2  flexor digitorum superficialis (four tendons)  flexor pollicis longus (one tendon)
The nerves and tendons that travel through the carpal tunnel are what give feeling and movement to the hand and fingers. When there is inflammation in the carpal tunnel, numbness or pain can occur in the hand.ntrinsic muscles only act on the fingers. The extrinsic muscles are the long flexors and extensors, which run from the forearm into the hand, providing strength to the hand and wrist. The flexors enable the fingers to bend while the extensor muscles are used to straighten the fingers.