It is innervated by the deep branch of the radial nerve ( C8- T1). It extends the thumb and, because of its close relationship to the long abductor, also abducts the thumb. Passing through the first tendon compartment together with the abductor pollicis longus, it is attached to the base of the proximal phalanx of the thumb. The extensor pollicis brevis originates on the ulna distal to the abductor pollicis longus, from the interosseus membrane, and from the dorsal side of the radius. It is innervated by the deep branch of the radial nerve (C7-C8). It uses the dorsal tubercle on the lower extremity of the radius as a fulcrum to extend the thumb and also dorsiflexes and abducts the hand at the wrist. Passing through the third tendon compartment, it is inserted onto the base of the distal phalanx of the thumb. The extensor pollicis longus originates on the dorsal side of the ulna and the interosseous membrane. Except for abducting the hand, it flexes the hand towards the palm and abducts it radially. A part of the tendon reaches the trapezium, while another fuses with the tendons of the extensor pollicis brevis and the abductor pollicis brevis. Passing through the first tendon compartment, it inserts to the base of the first metacarpal bone. The abductor pollicis longus originates on the dorsal sides of both the ulna and the radius, and from the interosseous membrane. Three dorsal forearm muscles act on the thumb: It is innervated by the anterior interosseus branch of the median nerve ( C7- C8) It finally attaches onto the base of the distal phalanx of the thumb. It passes through the carpal tunnel in a separate tendon sheath, after which it lies between the heads of the flexor pollicis brevis. Conforming to the shape of your thumb, this insert helps to abduct and stabilise the first metacarpal while opening the thumb web space.Flexor pollicis longus (left) and deep muscles of dorsal forearm (right)Ī ventral forearm muscle, the flexor pollicis longus originates on the anterior side of the radius distal to the radial tuberosity and from the interosseous membrane. The Cool Comfort Thumb Abduction Splint features a firm, mouldable insert inside the thumb strap. Easy to apply, this strap applies therapeutic compression to stimulate the healing process.Įasy to apply thumb strap Mouldable Insert The Cool Comfort Thumb Abduction Splint has a thumb strap with a simple hook-and-loop closure. Thumb deformity/contracture due to neurological conditions.The Cool Comfort Thumb Abduction Splint is recommended for: Maintaining the thumb in an abducted position, it stabilises the first metacarpal and helps to alleviate pain related to thumb contracture. The Cool Comfort Thumb Abduction Splint is made of breathable neoprene material with a soft terry cloth lining, making it comfortable to wear even for extended periods. However, a thumb abduction splint can help, keeping your thumb in a functional position while reducing pain. If you suffer from thumb pain or contracture due to a neurological condition, you'll know that it can be a bane to daily life.
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