![thumb abduction thumb abduction](https://i.ytimg.com/vi/rCtyXW-YdFI/maxresdefault.jpg)
Adducts the thumb at the 1st CMC joint (i.e., from the abducted position, moves the thumb posteriorly back toward the palm).Right: Wartenberg sign note the abducted positioning of the 5th finger. The net result is the extensor digiti minimi remains unopposed, with the abduction positioning favored. There is also attenuated function of the abductor digiti minimi (also ulnar nerve), but the effect of loss of adduction function of palmar interossei is more significant in pinky position. Wartenberg sign → ulnar nerve palsy resulting in attenuated function of palmar interossei → loss of pinky adduction component → pinky’s normal position is more abducted.Note that the pinky is adducted by the palmar interossei, but it is not abducted by the dorsal interossei the abductor digiti minimi abducts the pinky.Adduct the pinky, ring, middle, and index fingers (i.e., the pinky, ring, and index movement toward from the middle finger.Movement of the middle finger medially is referred to as ulnar abduction movement of the middle finger laterally is referred to as radial abduction. Abduct the ring, middle, and index fingers (i.e., the ring and index movement away from the middle finger + the middle. Should be noted that the middle finger has two dorsal interossei attachments and no palmar interossei attachments. Movement of the middle finger medially is referred to as ulnar abduction movement of the middle finger laterally is referred to as radial abduction.PAD DAB– mnemonic for memorizing actions of dorsal vs palmar interosseous functions – Palmar ADduction, Dorsal ABduction.Innervated by deep branch of ulnar nerve.Insert on the proximal phalanges and extensor expansions (specialized connective tissue).Abduct the ring, middle, and index fingers (i.e., the ring and index movement away from the middle finger + the middle finger movement radially).Innervated by the deep branch of ulnar nerve. Thumb Abduction W/ Wrist Band-Neoprene wraps around thumb & wristHook & loop closurePreshaped stay for thumb abductionAlso referred to as tether thumb.Enables grasping of large objects while the fingers are outstretched.Abducts the pinky at the 5th carpometacarpal joint.With the strap crossing the palm to the volar side of the hand, the thumb is placed in a functional position. This W-220 OPP variation introduces thumb opposition, in addition to abduction. In this case, the strap stretches dorsally toward the ulnar side of the hand. The W-220 ABD style splint primarily place the thumb in functional mid palmar/radial abduction. W-220 Product Instructions W-220 ABD - Thumb Abduction The addition of thermoplastic is available to provide more control, such as a thumb web space. Possible indications for either style include CMC dysfunction, osteoarthritis and rheumatoid arthritis, low median nerve injury and some UCL/RCL injuries.
![thumb abduction thumb abduction](https://online.boneandjoint.org.uk/cms/10.1302/1863-2548.15.200197/asset/images/medium/1863-2548.15.200197_fig4_html.jpg)
Improved functional use of the hand is possible by stabilizing, but not fully immobilizing the CMC joint, while allowing flexion of the thumb IP joint for tip to tip and tripod pinch.
#THUMB ABDUCTION SERIES#
Benik's W-220 Series Thumb Abduction and Opposition Supports are simple thumb sleeves with wrist straps that provide dynamic support to the thumb CMC and MP joints.