What are the 3 main flexors of the wrist?
What are the 3 main flexors of the wrist?
There are three flexors and three extensors. We’ll look at the flexors first. The two important ones are flexor carpi radialis, and flexor carpi ulnaris. They both arise from the medial epicondyle, where they share a massive tendon of origin, the common flexor tendon, with two other flexor muscles.
What are the wrist flexors and extensors?
Terms used to describe wrist and hand muscles
- Flexor – this means the muscle ‘flexes’ the wrist or thumb.
- Extensor – means it extends the wrist or thumb.
- Pollicis – means thumb.
- Digitorum – means fingers.
- Carpi – to do with the carpal bones in the wrist.
- Ulnaris – on the ulna side of the wrist.
What muscles are wrist flexors?
Figure 1: The most superficial of the wrist flexors are the flexor carpi radialis, palmaris longus, flexor carpi ulnaris, and pronator teres. The orientation of the pronator teres is a short angle from the medial epicondyle of the humerus and the medial ulna down to the lateral radius.
What are superficial flexors?
The superficial compartment of the flexor surface of the forearm contains the pronator teres, the flexor carpi radialis longus, the palmaris longus, the flexor carpi ulnaris, and the flexor digitorum superficialis. All of these muscles originate primarily from the medial epicondyle of the humerus.
What is the most likely origin of wrist flexors?
Flexor carpi radialis muscle
| Origin | Medial epicondyle of humerus |
|---|---|
| Insertion | Bases of metacarpal bones 2-3 |
| Action | Wrist joint: Wrist flexion, wrist abduction |
| Innervation | Median nerve (C6, C7) |
| Blood supply | Anterior/posterior recurrent ulnar artery, radial artery |
Is wrist a ball and socket joint?
The wrist joint also referred to as the radiocarpal joint is a condyloid synovial joint of the distal upper limb that connects and serves as a transition point between the forearm and hand. A condyloid joint is a modified ball and socket joint that allows for flexion, extension, abduction, and adduction movements.
What does flexor and extensor mean?
The key difference between flexor and extensor muscles is that flexor muscles facilitate the process of flexion in the body, while extensor muscles facilitate the process of extension in the body. Flexion is a bending movement where the angle between two body parts decreases.
What is a Palmaris longus?
The Palmaris longus (PL) muscle is a long, slender muscle which is usually present in the superficial volar compartment of the forearm, interposed between the Flexor Carpi Ulnaris and the Flexor Carpi Radialis muscles. The absence of the palmaris longus does not have an effect on grip strength.
What muscles are the most powerful wrist flexors?
The flexor carpi ulnaris (FCU) muscle is a type 2 muscle flap that can cover small to medium-size elbow defects in the posterior, medial, and anterior aspects of the elbow. Its main disadvantage is that use of this muscle takes away the most potent wrist flexor and ulnar deviator to the hand.
Which muscle is not a wrist flexor?
The extensor carpi ulnaris is a muscle that will not flex the wrist but will rather cause extension of the wrist when it contracts. Therefore, the correct answer is (a) extensor carpi ulnaris.
What is FDS and FDP tendons?
The flexor digitorum superficialis (FDS) muscles and the FDS tendons are known to have an overlying avascular segment at the level of the proximal phalanx. The flexor digitorum profundus (FDP) has an additional avascular zone at the level of the middle phalanx.
What Innervates wrist flexors?
The ulnar nerve delivers motor innervation to the flexor carpi ulnaris and the ulnar half of the flexor digitorum profundus. [12] The nerve travels posteriorly and enters the forearm through the cubital tunnel. Dorsal and palmar cutaneous nerves branch off the ulnar nerve, roughly 5 cm proximal to the wrist.
What are the two flexors of the wrist?
The two flexors of the wrist, the flexor carpi radialis and the flexor carpi ulnaris, are both superficial muscles lying directly beneath the skin.
What causes a flexor pronator strain?
A flexor pronator strain can either result from an acute event or can develop as a result of overuse. You might remember a specific throw where you felt sharp pain on the medial side of your elbow.
What is the best way to build up wrist flexors?
The wrist flexors consist of a high percentage of slow-twitch muscle fibers. That is, they’re endurance muscles, which contract slowly (i.e. non-explosively) and are highly resistant to fatigue. In order to get them to grow, you need to train with high reps/volume/frequency.
What are the best muscles to train on the wrist?
Wrist extensors: Train the wrist extensors using the same high rep/volume/frequency protocol that is outlined above for the wrist flexors. Also, train your wrist flexors and extensors in the same workout. Brachioradialis: Unlike the wrist flexors and extensors, the brachioradialis is a fast-twitch muscle.
