Flexor Pulley System Anatomy, Injury, and Management Journal of Hand Surgery
A trigger finger, sometimes referred to as a trigger thumb or stenosing tenosynovitis, can occur if one of three things happen: 1. The tendon enlarges (does not fit through pulley well); 2. The lining increases in thickness (does not fit through pulley well); 3. the pulley becomes thicker (the opening for the tendon gets smaller).
Pulley Injuries Explained (Part 1) — Grassroots Physical Therapy
The flexor pulley system of finger of hand consist of localized thickenings of the digital sheath. The index, middle, ring, and small fingers usually contain five annular pulleys (A1 to A5) and three cruciate pulleys (C1 to C3). Wuertzer SD, Pacholke DA. High-resolution 3-T MRI of the fingers: review of anatomy and common tendon and ligament.
Flexor Pulley System Anatomy, Injury, and Management Journal of Hand Surgery
The cruciate pulleys, allows the flexor sheath to concertina, that is to change length during flexion-extension. The thumb has an AI pulley volar to the MP joint and an A2 pulley volar to the IP joint. The oblique pulley is the largest and most important pulley in the thumb and lies between A1 and A2 obliquely across the proximal phalanx.
Trigger Finger Fort Worth, TX The Hand to Shoulder Center
From Lin GT, Amadio PC, Cooney WP: Anatomy of human digital flexor pulleys (accepted for publication by J Hand Surg). flGURE 3. The cruciate pulleys have one fixed attachment, to bone and one moveable attachment, to volar plate. From Lin GT, Amadio PC, Cooney WP: Anatomy of human digital flexor pulleys (accepted for publication by J Ha~d Surg).
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Pulley Injuries Explained (Part 1) — Grassroots Physical Therapy
The oblique ligament is the most important pulley for the FPL tendon. [3] If both the A1 and oblique ligaments are cut then bowstringing of the FPL tendon will occur. The Av ligament is not present in 7% of individuals. [3] Dysfunctional excursion of the FPL tendon through the pulley system results in trigger thumb. Go to: Embryology
Varied Anatomy of the Thumb Pulley System Implications for Successful Trigger Thumb Release
Definition/Description The pulley system is made of thickened areas of the flexor tendon sheath and plays an important role in: Flexion. Accurate tracking of tendons. Maintaining apposition of tendons and bones across joints preventing them from pulling away and bowstringing. Provides fulcrum to elicit movement (flexion and extension) [1]
Flexor Tendon Repair Surgical Repair TeachMeSurgery
The coronal plane is important for evaluating the collateral ligaments and articular cartilage, and the sagittal plane is important for evaluating the flexor and extensor tendons, volar plate, pulleys, and articular cartilage.
Hand Pulleys Physiopedia
The flexor pulley system of the hand is a complex structure that co-ordinates flexion of the digits. It consists of: Long flexor tendons - and their associated synovial sheaths. Annular pulleys - 5 associated with each finger, 2 associated with the thumb. Cruciate pulleys - 3 associated with each finger.
The Flexor Pulley System of the Hand Annular Cruciate Oblique TeachMeAnatomy
Pathology The annular pulleys are the most functionally important and commonly injured. They comprise a transversely oriented sheath of fibrous tissue that wraps over the flexor superficials and profunda tendons. There are five flexor tendon pulleys in the fingers that are named A1-A5. The thumb only has two pulleys that are described as A1 and A2.
Wrist and hand Basicmedical Key
Functional Anatomy of the Hand Introduction The hand contains a number of joints that allow complex actions, such as manipulating, gripping and grasping objects. Optimal hand function requires adequate strength, sensation, range of motion, and dexterity.
Alila Medical Media Finger tendon sheath and pulleys labeled. Medical illustration
The bony anatomy of the hand and wrist truly begins at the distal forearm with the radius and ulna. Distal to these are eight carpal bones: scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate, and hamate. The carpus articulates with five metacarpals which in turn articulate with the phalanges.
Palmar view of hand anatomy including tendons and pulleys Hand anatomy, Anatomy images, Anatomy
Many studies have looked at which combination of pulleys are required for mechanically efficient finger flexion and their results have guided hand surgeons in pulley preservation and reconstruction. In this article we review the anatomy of the flexor pulley system and its clinical relevance.
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The pulleys are fibrous tissue condensations, which almost encircle the flexor tendons forming a fibro-osseous channel that functions to keep the tendons adjacent to the phalanges. This enables the transfer of a translational force generated from the muscle-tendon unit into a rotational moment on the phalanges.
Mechanized Human Hands Neuroscience News
Detail the anatomy and biomechanics of the flexor pulley system. Describe the epidemiology and etiology of flexor pulley system injuries. Recognize the clinical manifestations of closed pulley system rupture. Offer diagnostic strategies for various types of closed pulley system ruptures.
Hand Anatomy Concise Medical Knowledge
Pulley Lesion of the Fingers Mark Awh, M.D. Clinical History: A 28 year-old rock climber presents with persistent pain and swelling at the index finger. (1a) A T2-weighted sagittal image with fat-suppression and (1b) a proton density-weighted fat-suppressed axial image are provided. What are the findings" What is your diagnosis? 1a 1b Figure 1:
Release of the A4 Pulley to Facilitate Zone II Flexor Tendon Repair Journal of Hand Surgery
1 Images Flexor Pulley System-Fingers Annular ligaments A2 and A4 are critical to prevent bowstringing most biomechanically important A1, A3, and A5 overlie the MP, PIP and DIP joints respectively originate from palmar plate A1 pulley most commonly involved in trigger finger Cruciate pulleys