wrist extensor muscles

There are several tendons that surround the wrist joint that can become injured or inflamed. Also, train your wrist flexors and extensors in the same workout. Train the wrist extensors toward the end of your workout, after doing any exercises requiring a strong grip. Begin backs of hands together in front of body at hip level. They are located on the posterior aspect of the wrist. In humans, certain muscles of the hand and foot are named for this function. Introduction Extensor muscles: A group of muscles in the forearm that serve to lift or extend the wrist and hand. The muscles arranged around the wrist combine in different ways to produce the movements of flexion, extension, abduction and adduction. Deep Muscles on the Back of the Forearm. Ulnar head : It originates from the olecranon, posterior surface of ulna, antebrachial fascia. Your wrist extensors are a group of 9 muscles that run along the posterior of your forearm, crossing your wrist, and running along the top of your hand to your digits . 5, in the common extensor tendon of the forearm. Explanation of extensor muscle of wrist, ulnar a device that restricts range of motion to allow for healing), then you probably shouldn’t be doing cleans at all…. METHODS AND MEASURES: Fifty unimpaired subjects (36 men, 14 women; mean age = 29 +/- 6 years) were tested with and … February 21, 2020Physiotherapy_Clinic0 Comments. Muscles Volar (cause flexion) PL,FCR,FCU FDS,FDP,FPL Dorsal (cause extension) ECRL, ECRB,ECU EDC,EIP,EDM,EPL,EPB,APL 24. The extrinsic flexors consist of 3 wrist flexors and a larger group of thumb and digit flexors. Start studying wrist extensors, Muscle of Upper Extremity ( Pictures). I know how much it sucks to not be able to lift at full capacity, but it’s not worth prolonging your healing time, or possibly re-injuring yourself. Muscles Supplied Directly by the Radial Nerve. The extrinsic extensor tendons reach the hand and digits by passing through a fibroosseous tendon sheath (retinaculum) located at the dorsal surface of the wrist. Pronation of forearm Flexor carpi ulnaris: 1. An example of this is a situation that we often see with long-distance drivers. In the arm, extensor retinaculum is located in the posterior portion of the forearm near the wrist joint. Repeat 10 times. If your wrist extensors are overactive and short, do the following: Reduce the amount of time spent doing any repetitive activities causing wrist extensor overuse. The flexors are long muscles that run on the anterior part of the forearm from the elbow down to the hand. Paul Ingraham • updated Apr 27, 2019. While these 9 muscles all work for wrist extension, the individual muscles can aid in other movements. It is supplied by deep branch of the radial nerve(C7, C8). The forearm is the portion of the arm distal to the elbow and proximal to the wrist. Save my name, email, and website in this browser for the next time I comment. Wrist Ice Wrap: When an individual has pain due to an injured extensor digitorum muscle, then just treating the thumb pain is not sufficient, but the whole muscle needs to be treated. The tendon of extensor carpi ulnaris can be identified on the dorsum of the wrist, when the wrist is extended and abduced against resisted. Wrist extensors: Train the wrist extensors using the same high rep/volume/frequency protocol that is outlined above for the wrist flexors. It is covered by the extensor carpi radialis longior muscle and lies on the supinator (brevis). Extensor carpi ulnaris is located on the back (dorsum) of the forearm amongst the other wrist extensors. If you’re doing a lot of wrist extensor exercises in your weight training program, make sure you’re using light weight. Your wrist extensors are a group of 9 muscles that run along the posterior of your forearm, crossing your wrist, and running along the top of your hand to your digits . Function: extension and adduction of the wrist… When the wrist extensors act together, they extend the wrist. It inserts at the base of the fifth metacarpal bone (see Fig. This includes your brachioradialis and wrist flexors. This stretch targets the extensor carpi radialis brevis, extensor carpi radialis longus, extensor carpi ulnaris, and extensor digitorum communis. Anconeus and ECRB+L. 48-1). The muscle forms a tendon near the wrist which passes below the extensor reticulum in its own sinovial sheath in a groove next to the ulnar styloid process. Assuming that’s the case, I know that a lot of guys will use wrist wraps (like these ones) to reduce pain on power cleans/front squats. The differences between Flexor Muscle and Extensor Muscle is Flexor muscles help in bending the joints or limbs whereas extensors straighten the limbs. any variations of the reverse biceps curl, front raise, lateral raise or rear deltoid raise). Keeping the elbows stationary, turn the wrists to the left, flex them up, turn to the right, and then flex down. The extensor digitorum muscle (also called the “extensor digitorum communis”) is one of the key muscles on the backside of the forearm. If you don’t have any issues with your wrist extensors, but want to build them up and make them stronger, the training advice below will help: Overall, the muscle fiber type of the wrist extensors is slow-twitch dominant. It has a relatively short muscle belly with a long, flat tendon that converges distally into a round tendon. They control movements of the wrist, hand, fingers and thumb. Dr. Nitesh Patel ( Physiotherapist ) : Mo No : 09898607803, Copyright © 2020 Mobile Physiotherapy Clinic Ahmedabad Gujarat, Flat Foot - Mobile Physiotherapy Clinic Ahmedabad Gujarat, De Quervain's Disease And Physiotherapy Treatment : - Mobile Physiotherapy Clinic Ahmedabad Gujarat, MUSCULAR DYSTROPHIES - Mobile Physiotherapy Clinic Ahmedabad Gujarat, BECKER'S MUSCULAR DYSTROPHIES - Mobile Physiotherapy Clinic Ahmedabad Gujarat, DISTAL MUSCULAR DYSTROPY - Mobile Physiotherapy Clinic Ahmedabad Gujarat. Here the best exercises to strength the finger/wrist extensor muscles: Reverse Wrist Curls (with a dumbbell), Wide Pinches with Wrist Extension (detailed below), Pronator Isolation, and finger extension against a rubber band. My goal is to help you learn proper weight training and nutrition principles so that you can get strong and build the physique of your dreams! Biasing Muscles/ Muscle Groups To bias extensor carpi radialis longus & brevis: preposition the wrist in slight extension and radial deviation and instruct the patient to extend the wrist leading with the thumb side. When the radial extensors, or the ulnar extensor contract separately, they help to produce radial or ulnar abduction of the wrist. It inserts on the extensor expansion located at the base of the proximal phalanx of digit V on the dorsal side. Muscle Tissue and Motion; Nervous Tissue Mediates Perception and Response; Tissue Injury and Aging; The Integumentary System. Flexor carpi ulnaris 5. The extensor tendon compartments of the wrist are six tunnels which transmit the long extensor tendons from the forearm into the hand. In general, these muscles originate on or near the lateral epicondyle and insert on the distal forearm or in the hand. It is supplied by posterior interosseous nerve(C7-C8). Flex the fist up toward the body. Introduction Middle of the lateral aspect of the shaft of the radius. To answer your question, I would first have to say that I’m not a medical professional, and you should definitely get an okay from your physician or physical therapist before doing anything. It acts as extensor and abductor of the hand at the wrist joint. Wrist Extensors are innervated by: Radial nerve. Here, we will discuss the posterior compartment of the forearm in the setting of their attachment points, function, innervation and vascular supply. The FCU tendon is one of two tendons that bend the wrist. The extensor carpi radialis longus is one of the five main muscles that control movements at the wrist. It acts as extensor of the wrist and the little finger.. The opposite equivalents of extensor muscles are flexor muscles… The tendons run through a series of rings, or pulleys, that form tunnels along the fingers and thumb. The wrist extensor muscles of the hand are located in the back of the forearm and have long tendons connecting them to bones in the hand, where they exert their action. Additionally, or alternatively, you could look into using athletic tape on your wrists. Stretches & Myofascial Release Techniques: Your email address will not be published. The following aspects were then analyzed: (a) the presence of additional muscle bellies of … The flexor group of muscles is involved in pronation of the forearm and flexion of the wrist and fingers, while the extensor group of muscles is involved in the supination of the forearm and extension of the wrist and fingers. MUSCLES OF WRIST COMPLEX Primary role – • To provide a stable base for hand while permitting positional adjustments & allow for optimal length tension relationships. In some cases, these trigger points (left untreated) may be … Wrist and Finger Extensors. That’s an important part of the action we make when we go to grip something. Extend and abduct wrist. Extensor definition is - a muscle serving to extend a bodily part (such as a limb). Trigger Point Overview - Wrist Extensors Trigger points in the wrist extensor muscles are incredibly common and are often related to repetitive strain injuries, primarily associated with gripping. It is not necessarily desirable to eliminate wrist extension training altogether; high rep wrist extensor training, especially eccentric training, can help if you’re on the verge of developing lateral epicondylitis. Extensor Retinaculum Of The Hand. This way, you avoid fatiguing your forearms and prevent your grip strength from giving out during a heavy compound movement like the deadlift or bench press. If you buy through a link on my site, I may earn an affiliate commission at no extra cost to you. Extensors synonyms, Extensors pronunciation, Extensors translation, English dictionary definition of Extensors. On the extensor side of the forearm, separate and dissect the superficial extensor muscles. This muscle is quite long, starting on the lateral side of the humerus, and attaching to the base of the second metacarpal bone (metacarpal of the index finger). ECRL+B, ECU, ED, EDM, EPL. Vastral Stretching the wrist extensors can be an effective treatment for tennis elbow or lateral epicondylitis. It originates from lateral supracondylar ridge of humerus. Examples of extensor muscles include the muscles that straighten the elbow or the knee. Knowledge of additional radial wrist extensor muscle bellies with independent tendons is useful in the above-mentioned surgical procedures. Define extensor muscle of wrist, ulnar. The tendons of the extensor carpi radialis longus and brevis muscles are quite useful in tendon transfer, such as in correction of finger clawing and restoration of thumb opposition. It has 2 heads Humeral head : It originates from lateral epicondyle of the humerus. The wrist extensors are a group of nine individual muscles on the back of the forearm that act on the wrist and fingers. The PIN (Posterior interosseous nerve from Radial nerve) innervates the EDC, EDM, and ECU muscles from the superficial wrist extensor compartment. This is the starting position. Ahmedabad Presumably because of postoperative scarring, my wrist extension on that side is limited, making cleans etc painful. the contractile tissue that effects the movement of and within the body. The extensor digitorum muscle helps … Superficial muscles: 1. Each tunnel is lined internally by a synovial sheath and separated from one another by fibrous septa.. Collectively, their primary function is wrist extension, though they also help carry out other movements of the wrist and fingers. Pronator teres 2. The tendon attaches to a tubercle on the medial side of the base of the fifth metacarpal. Sit on a chair, take a tube resistance band in the right palm, and step on the other end with the right foot. For example, lateral epicondylitis affects 1-5% of the general population. Ulnar head: Medial border of coronoid process of ulna 2. The Flexors And Extensors Of The Wrist The muscles which flex and extend the fingers of course also move the hand as a whole, but in addition to these muscles there are five others, - two flexor muscles and three extensor muscles, - which are inserted into the bones of … Physiotherapist in Samarpan Physiotherapy Clinic Learn vocabulary, terms, and more with flashcards, games, and other study tools. The wrist extensor muscles make up a significant component of the posterior forearm musculature. With other hand, grasp at thumb side of hand and bend wrist downward. Note: The table below includes just the exercises that directly target the wrist extensor muscles. It originates from the posterior distal third of ulna and interosseous membrane. The ECU is the most medial muscle in the extensor group. The muscles that give rise to these tendons originate in the forearm and elbow (Fig. Do this 10 times and then take the resistance band in the left hand and repeat. You’ll also have to practice taping your wrists to get the right amount of pain reduction/flexibility. Origin – Lateral epicondyle of the humerus; … The extensor carpi ulnaris (ECU) originates from the lateral humeral epicondyle at the common extensor tendon and from the posterior surface of the proximal ulna. Insertion: 2.1. In some cases, these trigger points (left untreated) may be the cause of more complex injuries. There are 2 layers of extensor muscles – a more superficial layer and a deeper layer. Superficial Muscles on the Back of the Forearm. extensor muscle of wrist, ulnar synonyms, extensor muscle of wrist, ulnar pronunciation, extensor muscle of wrist, ulnar translation, English dictionary definition of extensor muscle of wrist, ulnar. Knowledge of additional radial wrist extensor muscle bellies with independent tendons is useful in the above-mentioned surgical procedures. Muscle Tissue and Motion; Nervous Tissue Mediates Perception and Response; Tissue Injury and Aging; The Integumentary System. Thankfully I’ve never had to deal with wrist issues, but from what I’ve read, the key to wrapping them successfully is get the right position: You don’t want them too high,, since that will impair your range of motion. The individual wrist extensor muscles are as follows: Extensor carpi radialis longus (ECRL) Find out information about extensor muscle of wrist, ulnar. This study aims to evaluate the effects of strengthening exercises on wrist flexor and extensor strength, hand grip strength, and counter-stroke performance. Extensor tendons are located at the top of the wrist and the back of the hands and they connect muscles in the forearm to the finger bones. Consider the following for these muscles. Extrinsic denotes their location outside the hand. If you still have to be in an actual brace (i.e. They have a lot of complicated long names. Looking for extensor muscle of wrist, ulnar? The wrist extensor muscles include the extensor digitorum, extensor carpi radialis longus, extensor carpi radialis brevis and the extensor carpi ulnaris. Traductions en contexte de "extensor muscles" en anglais-français avec Reverso Context : You're through the fascia into the extensor muscles. Its muscle belly is in the forearm. The extensor carpi ulnaris is an important extensor and adductor of the wrist. It originates from the lateral epicondyl of the humerus. Muscles in the upper forearm pull on the tendons which cause the hand and fingers to extend. Flexor digitorum superficialis Pronator teres:It has two head. It belongs to the deep extensors of the forearm, together with supinator, abductor pollicis longus, extensor pollicis longus, and extensor pollicis brevis muscles. It is supplied by deep branch of the radial artery. In patients suffering from chronic conditions like diabetes, trauma or damage to the retinaculum may be associated with severe pain and limited mobility of the extensor muscles. Extensor Carpi Ulnaris Actions. Just like the flexor muscles of the forearm that these muscles work against, each extensor muscle is long and thin and extends into the hand via long tendons. Synonyms for extensor muscle of wrist, ulnar in Free Thesaurus. I’m happy to hear you enjoyed the article. Learn more. It acts as an extensor of wirst joint and abductor of the hand at the wrist joint. There are 12 extrinsic extensors of the wrist and digits, all of which are innervated by the radial nerve. (Play movie; View images: N 444, 446, 450, 451, TG 2-21, 2-22, 2-23, 2-29) The muscles of the posterior forearm region lie in two layers, superficial and deep. There are 2 layers of extensor muscles – a more superficial layer and a deeper layer. Hi Fred, thanks for reading and commenting. Wrist extensor stretch. Thirty amateur table tennis players were recruited and randomly allocated into two groups: the control and the training group (n = 15/group). The wrist and hand muscles include the flexor pollicis longus, flexor digitorum superficialis, flexor carpi ulnaris, flexor carpi radialis, extensor digitorum communis, extensor carpi ulnaris and the extensor carpi radialis muscles. THE HAND COMPLEX 25. It attaches to the wrist bone, the pisiform, and as well as the 5th hand bone. It inserts on the posterior base of the 3rd metacarpal. If you have developed lateral epicondylitis, see. Nice article and review. Again, please consult your doctor/physical therapist before doing either of these solutions. 325). This is the only muscle responsible for ulnar deviation (moving the hand sideways in the direction of the little finger). Introduction; Layers of the Skin; Accessory Structures of the Skin; Functions of the Integumentary System; Diseases, Disorders, and Injuries of the Integumentary System; Bone Tissue and the Skeletal System. Wrist tendonitis is not necessarily confined to a single tendon or part of the wrist. The extrinsic hand muscles originate in the forearm and insert on structures within the hand. …However, I’m guessing you just mean any type of wrist support. My name is Alex, and I'm the owner and author of King of the Gym. Humeral head: medial epicondyle of humerus 1.2. Anterior compartment of the forearm muscles divided into superficial & deep muscles. 3. Bapunagar But you also don’t wan’t them too low, since they won’t really provide any support and therefore won’t reduce pain. Origin: 1.1. Compartment 6: ECU (Extensor Carpi Ulnaris) Snapping ECU: ECU tendon subluxates producing painful “snap” during extension and supination and reduces with pronation. It inserts on the extensor expansion of the middle and distal phalanges of 2nd, 3rd, 4th and 5th fingers. Antonyms for extensor muscle of wrist, ulnar. Brachioradialis: Unlike the wrist flexors and extensors, the brachioradialis is a fast-twitch muscle. Massage Therapy for Tennis Elbow and Wrist Pain. It inserts on the dorsal surface of the base of the second metacarpal bone. However, they also get trained indirectly in any exercise where the wrist must resist the weight/gravity to stay in neutral and avoid going into wrist flexion (i.e. Anconeus, ECRL+B, ECU, ED, EDM. fred. Your email address will not be published. With that in mind, I recommend doing 6-8 sets of wrist extensor exercises for 12-20+ reps per set, twice per week. METHODS. The main hand extensor muscle is called the Extensor Digitorum, and it's one of several wrist extensor muscles found in the outer portion of your forearm. In this case, the extensor brevis can be usefully retrieved to re-establish function in the first dorsal interosseous muscle or paralysed extensors. Wrist extensors were active at moderate-to-high levels across nearly all conditions and demonstrated greater activity than the wrist flexors during handgrip-dominant tasks. Navigation PreserveArticles.com: Preserving Your Articles for Eternity PreserveArticles.com is a free service that lets you to … The extensor muscles are all extrinsic, except for the interosseous-lumbrical complex, which is involved in interphalangeal joint extension. The movement is usually directed backward, with the notable exception of the knee joint. Read more. It originates at your elbow and runs down to your four fingers. ECU subsheath is a part of TFCC. Sit or stand with the spine erect, shoulders rolled back, and look forward. Extensor denotes their action which is … Reverse the direction and repeat it 10 times. Trigger Point Overview - Wrist Extensors Trigger points in the wrist extensor muscles are incredibly common and are often related to repetitive strain injuries, primarily associated with gripping. maitrise-orthop.com Dans ce cas, le prélèvement du court extenseur peut être utile pour rétablir la fonction d'un premier interosseux dorsal ou … The main function of the Extensor Digitorum is to extend your hand at your wrist and to extend all the joints of your fingers. The superficial extensors of the forearm are the brachioradialis, extensor carpi radialis longus, anconeus, extensor carpi radialis brevis, extensor carpi ulnaris, extensor digitorum and extensor digiti minimi.. This retinaculum functions to prevent bowstringing of the tendons, causing close approximation of the tendon to the bone and allowing efficient extension. Amaraiwadi Clinical pathology affecting one or multiple muscles in this group is not uncommon. Palmaris longus 3. The extrinsic extensor muscles of the hand are located in the back of the forearm and have long tendons connecting them to bones in the hand, where they exert their action. This means they respond better to high rep sets with lighter weight, high training volume and high training frequency. The tendon travels along the inside of the forearm on the side of the small finger and crosses the wrist. BACKGROUND: Fatigue of the wrist extensor muscles is thought to be a contributing factor in the development of lateral epicondylitis. The skin, subcutaneous tissue, and antebrachial fascia of 48 (24 on the right side and 24 on left side) male upper limb forearms were dissected. The wrist extensors includes extensor carpi radialis longus (ECRL), extensor carpi radialis brevis (ECRB), extensor digitorum (ED), extensor digiti minimi (EDM), extensor carpi ulnaris (ECU) and extensor indicis (EI). There are 20 muscles separated into two compartments. Flexor carpi radialis 4. The extensor muscles of the forearm occupy the posterior lodge (extensor-supinator lodge) of the forearm and are separated from the flexor muscles of the forearm by the radius and ulna Technical sheet on stretching the wrist extensors: This exercise can be done quite easily everywhere, because it is quite simple to do. Perfect Spot No. It acts as a pure extensor of the wrist (Fig. An accompanying workbook is associated with this video: https://drive.google.com/drive/folders/1kQWLllswqBdfG7i77S3UKCO98gviS9uC?usp=sharing Clinical … 3. Each group pulls on the tendons that attach to the wrist and hand bones to flex or extend the wrist. For a discussion of the anterior forearm compartment, check out this article. Mobile Physiotherapy Clinic Wrist extensor group: extensor carpi radialis longus extensor carpi radialis brevis extensor carpi ulnaris Extensor Carpi Radialis Brevis – Trigger Points Joe Muscolino October 19, 2017 Extensor pollicis longus originates from the middle third of the posterior surface of ulna, mostly along its radial border.This attachment extends onto the adjacent interosseous membrane, and is situated proximal to the origin of extensor indicis muscle.From here, the muscle belly runs obliquely in a radial direction, towards the lateral aspect of the wrist joint. Kabuki Strength Power Bar Review: New Generation Power Bar, Force USA Monster G12 Review: All-In-One Gym, Force USA Monster G9 Review: All-in-One Gym, Force USA Monster G6 Review: All-in-One Home Gym, Lateral supracondylar ridge of the humerus, Posterior surface of the base of the 2nd metacarpal, Lateral epicondyle of the humerus via the common extensor tendon, Posterior surface of the base of the 3rd metacarpal, Extensor expansions of the index, middle, ring and little fingers, Posterior surface of the base of the 5th metacarpal, Distal 1/3 of the posterior surface of the ulna and interosseous membrane of the forearm, Middle 1/3 of the posterior surface of the ulna and interosseous membrane of the forearm, Posterior surface of the base of the distal phalanx of the thumb, Distal 1/3 of the posterior surface of the radius and interosseous membrane of the forearm, Posterior surface of the base of the proximal phalanx of thumb, Lateral surface of the base of the 1st metacarpal, The ECRL, ECRB, ED, EDM and ECU are classified as part of the superficial posterior compartment of the forearm, which also includes the, The EI, EPL, EPB and APL are part of the deep posterior compartment of the forearm, which also includes the, Extension of index, middle, ring and little fingers at metacarpophalangeal and interphalangeal joints, Extension of little finger at metacarpophalangeal and interphalangeal joints, Extension of index finger at metacarpophalangeal and interphalangeal joints, Thumb extension at interphalangeal, metacarpophalangeal and carpometacarpal joints, Thumb extension at metacarpophalangeal and carpometacarpal joints, Proximal ½ of the posterior surfaces of the ulna and interosseous membrane, Middle 1/3 of the posterior surface of the radius. It originates from the anterior of the lateral epicondyl of the humerus. The extrinsic finger/thumb and abductor thumb muscles are innervated by: The radial nerve. Extensor digiti minimi muscle 2 Extensor carpi ulnaris. Stick to the above training guidelines for. The extensor carpi radialis brevior arises from the common tendon of the lateral condyle and fascia, and, running down parallel to the longior muscle, inserts into the base of the third metacarpal bone. Your email address will not be published. Extensor muscle, any of the muscles that increase the angle between members of a limb, as by straightening the elbow or knee or bending the wrist or spine backward. Mentioned in: Tennis Elbow To increase the stretch, bend wrist toward small finger. Reduce your total training volume on wrist extensor exercises. Secondary Wrist and Hand Flexors. Place the right elbow on the right thigh, with the palm facing down. superficial extensor. Resistance is applied over the 2nd metacarpal (radial … Home > Blog > Anatomy > Wrist Extensors: Functional Anatomy Guide. Don’t neglect the rest of your forearm musculature. The wrist extensor muscles of the hand are located in the back of the forearm and have long tendons connecting them to bones in the hand, where they exert their action. All extensors are parallel-oriented fusiform muscles, except for the extensor digitorum, which has an oblique fiber orientation and a unipennate architecture. Hold one arm straight out in front. Action: 3.1. Palpation of the Extensors and Flexors of the Wrist - YouTube 6.7 ). Palmaris longus tendon EI, … The extensor muscles, including the extensor carpi radialis longus and brevis and extensor carpi ulnaris, lie on the posterior side of your arm. For this the Ice Wrist Wrap has been shown to be quite beneficial, as it covers the entire muscle and provides compression and helps in healing of the muscle. Extensor indicis muscle (Musculus extensor indicis) Extensor indicis is a narrow, elongated muscle found in the posterior compartment of the forearm. Stand at a table with the palms down, fingers flat, and elbows straight. n. A muscle that extends or straightens a limb or body part. Origin: It ha… Question. The powerful gripping muscles, whose tendons run over the front of the wrist, are slack and feeble when the wrist is flexed, but they become tight and powerful when it’s extended. Note: Most sources I found classified the ECRB and ECU as fusiform, but at least one source contradicts that and classes them as bipennate muscles. The forearm support band is purported to reduce or prevent symptoms of lateral epicondylitis but the mechanism of action is unknown. This movement is accomplished by two groups of muscles called the flexors and the extensors. Required fields are marked *, Hey! The wrist extensors are a group of nine individual muscles on the back of the forearm that act on the wrist and fingers. Both groups of muscles are furthermore involved in the abduction and adduction of the wrist. I had surgery on my forearm for anterior interosseous nerve entrapment. The extensor tendons leave the forearm and enter the hand through six dorsal compartments at the level of the wrist and are secured by the extensor retinaculum. If the wrist is viewed in cross-section, the flexor and extensor tendons involved in wrist movement can be … The powerful gripping muscles, whose tendons run over the front of the wrist, are slack and feeble when the wrist is flexed, but they become tight and powerful when it’s extended.

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