It’s a painful inflammation of tendons in your wrist and lower thumb. When the swollen tendons rub against the narrow tunnel they pass through, it causes pain at the base of your thumb and into. Tendons of the Thumb. The thumb consists of eight muscles: four within the hand and four connecting from the forearm into the bones of the thumb. This allows for the power of gripping and pinching. Pain at the base of the thumb is the most common symptom that occurs with these activities.
There are four thumb tendons: Abductor pollicis longus: This tendon helps you move the thumb away from the palm to form an open hand. Flexor pollicis longus: This tendon helps you bend the thumb. Extensor pollicis brevis: This tendon travels along the back of the thumb and helps straighten the thumb. It connects the muscle in the back of the. When this occurs repeatedly and in excess, or in an intense, forceful, or unnatural manner, it may result in damage to the tendon and associated mechanism. This subsequently leads to inflammation, degeneration and swelling to one or more of the tendons associated with the thumb - a condition known as thumb cinedivx.info: Kalpana Kumari.
De Quervain's tendinosis occurs when the tendons around the base of the thumb are irritated or constricted. The word "tendinosis" refers to a swelling of the tendons. Swelling of the tendons, and the tendon sheath, can cause pain and tenderness along the thumb side of the wrist. Thumb Tendons APL tendon. The abductor pollicis longus tendon runs on the radial side of the wrist (the side the thumb is on). Its muscle belly is in the forearm and then travels inside a tough band, or retinaculum, across the wrist. The band of tissue, or retinaculum, holds the tendons in place but allows them to slide up and down the arm.