China
Africa
Explore chapters and articles related to this topic
Designing for Hand and Wrist Anatomy
Published in Karen L. LaBat, Karen S. Ryan, Human Body, 2019
Nerves in the hand and wrist are susceptible to localized damage that can limit function. Avoid tight product features at the vulnerable points of these nerves. Wrist restraints, hand cuffs, or any tight wearable around the distal forearm can compress the radial sensory nerve and cause sensory change in the thumb side of the dorsum of the hand, parts of the index and long fingers, and the radial side of the thumb. If the radial nerve is damaged in the upper arm, as it wraps around the humerus, or in the forearm, the person may exhibit “wrist drop,” an inability to extend the wrist—often accompanied with loss of radial sensory nerve sensation. You can simulate the limitations of the injury by supporting the volar forearm with your opposite hand and letting your hand drop downward. Then with your “dropped hand” try to pick up a pencil or pen and try to write. A wrist/forearm brace to hold the hand in a position of function, wrist somewhat extended and ulnar deviated, increases grip strength and helps with fine motor hand activities.
Skill level and forearm muscle fatigue effects on ball speed in tennis serve
Published in Sports Biomechanics, 2021
Lin-Hwa Wang, Kuo-Cheng Lo, Fong-Chin Su
Injuries at lateral tendon, medial tendon and medial collateral ligament, a restricted range of motion and tingling in the fingers are symptoms of mild supination and flexion contractures involving overused muscles, and improper hitting posture among tennis players (Kibler, Chandler, Shapiro, & Conuel, 2007; Kibler, Chandler, & Stracener, 1992; Wolf & Altchek, 2003). Studies have demonstrated that wrist extensors are highly involved in all tennis strokes (Rossi, Vigouroux, Barla, & Berton, 2014). Muscle stiffness and overload can result in repeated micro-traumas to the radial nerve if the extensor group and supinator muscle are at near-maximum contraction. Radial nerve disorders are more likely to occur when tennis players perform repetitive motions and overuse their upper extremities (Colak, Bamaç, Ozbek, Budak, & Bamaç, 2004). Ulnar nerve decompression, specifically in tennis players, has recently drawn attention to the individual function of upper extremity joints during tennis. However, the effects of lateral/medial epicondylitis on wrist and hand movement during tennis serving, a repeated-skill motion, must be determined to obtain a comprehensive understanding of this topic.
Development of an expert derived ICD-AIS map for serious AIS3+ injury identification
Published in Traffic Injury Prevention, 2020
Jo Barnes, Kathryn L. Loftis, Lauren Jones, Janet P. Price, Patrick J. Gillich, Kathy Cookman, Amy L. Brammer, Trish St. Germain, Vickie Graymire, Donna A. Nayduch, Maureen Brennan
The other 34% (n = 1,519) of AIS9 no-maps were injury S codes and the reasons for not being able to assign an AIS severity are listed in table A2. Unspecified injuries to the nerves, muscles, tendons, ligaments and blood vessels accounted for 44% (n = 668) of the ‘S’AIS 9 no-maps. The rules for AIS coding contributed to the number of AIS 9 no-maps; specifically, blood vessels or nerves need to be named for a valid code to be assigned in AIS08 (e.g., ‘injury to radial nerve’ will have a valid AIS08 severity but ‘unspecified nerve of forearm’ would only map to AIS08 NFS 9 severity and therefore AIS9 no-map). Of note are the crushing injuries (n = 104) that could not be mapped to an AIS08 severity – this was based on the ICD descriptor, such as ‘crushing injury to back’. Without additional injury definitions to meet the AIS ‘crush’ criteria most could not be mapped to an AIS08 severity. Only 1% (n = 19) of the ‘S’codes relating to brain/head injury could not be mapped to an AIS severity.
Comparison and convergence of compartment syndrome techniques: a narrative review
Published in Expert Review of Medical Devices, 2023
Naveen Sharma, Nitin Mohan Sharma, Apurva Sharma, Sarfaraj Mirza
Limbs in our body contain different compartments that have the risk of compartment syndrome, such as the radial nerve, ulnar nerve, and median nerve present in the anterior compartment, and the triceps muscles present in the posterior compartment of the upper arm. Similarly, there are dorsal (finger and wrist extensors) and volar (wrist and finger flexors) compartments in the forearm [7]. Anterior, posterior, and medial are three muscle compartments present in the upper leg, whereas the lower leg has four compartments, i.e. superficial posterior, lateral, anterior, and deep posterior [4].