Thumb pulley anatomy. 44 0 obj <> endobj A Cadaveric Study of the Thread Trigger Finger Release: The First Annular Pulley Transection Through Thread Transecting Technique. When the fingers are flexed, the node moves proximal to the pulley, however when the patient attempts to extend the digit this node fails to pass back under the pulley. 2011 Jun;36(6):1114. doi: 10.1016/j.jhsa.2011.03.047. This site needs JavaScript to work properly. Chung TL, Holton LH 3rd, Banks ND, Goldberg NH, Silverman RP. 2018 Feb 20;2(2):CD009860. The pulleys are appropriately named, as they have a pulley-like function that allows the flexor muscle and tendon units to efficiently exert their force upon their respective fingers. Palmar Aponeurosis Pulley 2. <<4976B415EAC6594B8D7C3A1EACC5AE60>]>> The annular and cruciate pulleys are areas of focal thickening of the flexor tendon sheath that are of critical importance to the normal biomechanical function of the finger. The pulley at the base of the finger is called the “A1 pulley.” This is the pulley that is most often involved in trigger finger. The most common injury in climbers is the A2 pulley sprain or rupture and is caused by overloading the tissue. Thumb pulley anatomy Some common anatomic variations of have been described as well (Bayat 2002). Consequently, the digit becomes locked in a flexed position. Ann Plast Surg. NLM 0000003184 00000 n Methods: Fourteen fresh frozen cadaveric specimens were used: 56 fingers and 14 thumbs. Some common anatomic variations of have been described as well (Bayat 2002). The Safety of Percutaneous Trigger Digit Release Increased by Neurovascular Displacement with Local Hydraulic Dilatation: An Anatomical and Clinical Study. Wang H, Wang P, Amajoyi O, Chen CJ, Chen GY. 0000000963 00000 n 63 0 obj <>stream 2001 Feb;(383):84-96. doi: 10.1097/00003086-200102000-00011. Along the tendon sheath, bands of tissue called “pulleys” hold the flexor tendons closely to the finger bones. Pulley anatomy of the thumb is somewhat different (Fig 2). 2017 Oct 22;23:5034-5040. doi: 10.12659/msm.904676. Efficacy of a percutaneous A1 pulley release technique with identification of anatomic differences between genders. Epub 2017 Mar 13. MRI Anatomy of Pulley System. Annular Pulleys The fingers have 5 annular ligaments (A1–5) and 3 cruciate ligaments (C1–3) that hold the flexor tendons tightly close to the bones. The tendons pass through the pulleys as the finger moves. 0000003494 00000 n 0000004138 00000 n 3 Cruciform Culleys. Cochrane Database Syst Rev.

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