What is the antagonistic action of flexion?
Antagonistic muscle pairs
|Joint||Antagonistic pair||Movements produced|
|Elbow||Biceps; triceps||Flexion; extension|
|Knee||Hamstrings; quadriceps||Flexion; extension|
|Shoulder||Latissimus dorsi; deltoid||Adduction; abduction|
What is the antagonist of the wrist flexors?
Flexor carpi radialis muscle
|Flexor carpi. radialis muscle|
|Actions||Flexion and abduction at wrist|
|Antagonist||Extensor carpi ulnaris muscle|
|Latin||musculus flexor carpi radialis|
How antagonistic muscles bring about extension and flexion?
The two muscles in an antagonistic pair are in opposition. That is, if one extends a limb during its contraction, the other will return the limb to its original position when flexed. The agonist is a muscle that contracts to cause the movement. The antagonist is an opposing muscle that relaxes relatively to stretch.
What is the antagonist muscle in elbow flexion?
During elbow flexion where the bicep is the agonist, the tricep muscle is the antagonist.
What are the 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 muscles cause flexion of the wrist?
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 is the function of the palmar muscle?
Apart from this, the muscle also helps in tightening and tensing up the palmar aponeurosis. Its main function appears to be as an anchor for the skin and fascia of the hand in resisting horizontal shearing forces in distal direction.
How does the palmaris longus help the hand?
Palmaris longus synergistically works with the long flexors of the forearm to bring about flexion at the wrist joint and small joints of the hand. Apart from this, the muscle also helps in tightening and tensing up the palmar aponeurosis.
How is the interphalangeal capsule strengthened by palmar plate?
The capsule at each interphalangeal (IP) joint is strengthened by radial and ulnar collateral ligaments and a palmar plate. The collateral ligaments restrict any side-to-side movements, and the palmar (volar) plate limits hyperextension.
Which is the palmar aspect of the biaxial joint?
Metacarpophalangeal (MP) condyloid, biaxial joints joint’s palmar aspect is palpable at level of distal palmar crease proximal joint surface is convex and distal surface is concave roll and glide occur in same direction anterior with flexion posterior with extension.