There are five flexor tendon zones (Figure 43-9). He received his medical degree from Dartmouth Medical School, Hanover, N.H., and completed a family practice residency at Dewitt Army Community Hospital.DIP joint should be isolated during the examination.Tender at dorsal aspect of the DIP jointUnstable joints or large avulsion fragmentsThe opinions and assertions contained herein are the private views of the authors and are not to be construed as official or as reflecting the views of the U.S. Army Medical Department or the U.S. Army Service at large.A low threshold for referral should exist for collateral ligament injuries in children, because the growth plate often is involved.Collateral ligament injury (usually at the PIP joint)Flexor digitorum profundus tendon injury (jersey finger).
Injury of the Hand Causing Hand Tendonitis. Once the FDS enters the tendon sheath, it is separated into two tendons that surround the FDP and insert into the shaft of the middle phalanx. Injuries of the pulley system are also described.The treatment is conservative in all cases except for unstable type III injury (fracture-dislocation), which needs open reduction and internal fixation.Instability in the sagittal plane is caused by hyperextension of the PIP joint or rotational longitudinal compression.In type II lesions, involvement of the periarticular soft tissues is more extensive, with volar plate avulsion and a major split between the components of the collateral ligament complex.
Finger extension involves simultaneous actions In general, normal ligaments and tendons have low signal intensity on MR images, whereas disruption manifests as increased signal intensity. In chronic lesions, which usually manifest as finger deformities, MR imaging allows determination of the different underlying pathologic changes that affect soft-tissue articular structures, tendinous structures, or both. Tendon may be normal or inflamed in Trigger finger disease. Within the wrist and hand, the FDS tendons are located superficially (volar) to the FDP tendons. In this article, we review the normal anatomy of the finger together with the clinical and MR imaging findings of the most frequent soft-tissue injuries, which are divided into articular and tendon injuries. In most acute injuries, MR imaging allows precise assessment of the degree and extent of the lesion, with a remarkable effect on the therapeutic plan in individual cases. The are nine extensor tendon zones (Figure 43-10). Improper diagnosis and treatment of finger injuries can cause deformity and dysfunction over time. The PIP joint usually is involved in collateral ligament injuries, which are commonly classified as “jammed fingers.”Unstable joint or injury in a childThe evaluation of finger injuries during an athletic event differs from an evaluation in the office. Tendon tear often follows inflammation and tendonitis. Trauma to the extensor and flexor tendons can result in open or closed injuries. The physician should evaluate active flexion and extension by asking the patient to open and close his or her fist.Progressive extension using a dorsal aluminum splint to improve range of motion.No active extension of the DIP jointCollateral ligament injuries present as pain located only at the affected ligament. Are you sure?Avulsion fracture involving more than 30 percent of the joint or inability to achieve full passive extensionExtensor tendon injury at the DIP joint (mallet finger)Stable joint: buddy tape for two to four weeks. Articular injuries include volar plate and collateral ligament lesions of the PIP and MCP joints. A swelling tendon in your finger may be an indication of tendonitis. Routine MR imaging of the finger was performed in the axial, sagittal, and coronal planes in relation to the MCP and PIP joints of the extended finger. Most injuries require splinting and follow-up to evaluate the healing process.Patients with PIP joint injuries may continue to participate in athletic events during the splinting period, although some sports are difficult to play with a fully-extended PIP joint. Articular injuries include volar plate and collateral ligament lesions of the PIP and MCP joints. Forgot your username?T1-weighted images (repetition time msec/echo time msec = 450/15), T2*-weighted gradient-echo images (600/34, 25° flip angle), and short inversion time inversion-recovery images (1,900/40, 95-msec inversion time) were obtained with an 8–9-cm field of view, a 256/320 × 192/256 acquisition matrix, two to three signals acquired, and a section thickness of 3–4 mm with no gap. Normal Anatomy.
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finger anatomy tendons