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tricep brachiii

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13y ago

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What do the muscles do when you straighten your arm?

Straightening your arm at the elbow is called extension. Elbow extension is caused primarily by contracting the triceps brachii muscle, although the small anconeus muscle does play a role. Wrist extension is accomplished primarily by contracting the extensor carpi radialis & the extensor carpi ulnaris; but is also assisted by contracting the extensor digitorum, the extensor indicis, the extensor digiti minimi, the extensor pollicis brevis, & the extensor pollicis longus.


What muscle in upper arm that extends lower arm?

The posterior deltoid is one extensor of the upper arm.


What muscles help you move your lower arm?

The main muscles responsible for moving the lower arm are the biceps and triceps. The biceps are responsible for bending the arm at the elbow, while the triceps are responsible for straightening the arm at the elbow. Additionally, muscles in the forearm, such as the flexor and extensor muscles, help with fine movements of the lower arm and wrist.


Which reflex is trigger when a stranger suddenly grasp your arm?

The crossed-extensor reflex. The grasped arm is withdrawn while the other arm pushes you away from the stranger.


Which muscles straighten the arm?

no it isnt because the arm is bent by the flexor muscles (mostly just the biceps), and straightened by the extensor muscles (ie. the triceps).


In a crossed extensor reflex if the right arm were grabbed it would flex and the left arm would?

In a crossed extensor reflex, if the right arm were grabbed, it would flex due to the withdrawal reflex, while the left arm would extend to help with balance and support. This reflex is coordinated by the spinal cord without involvement of the brain.


What type of movement does the contraction of a Extensor produce?

The contraction of a flexor allows the arm or leg to bend


The muscles on your lower arm are the?

There's more than one: flexor carpi radialis palmaris longus flexor carpi ulnaris pronator teres flexor digitorum superficialis (sublimis) flexor digitorum profundus flexor pollicis longus pronator quadratus brachioradialis extensor carpi radialis longus extensor carpi radialis brevis extensor digitorum (communis) extensor digiti minimi (proprius) extensor carpi ulnaris abductor pollicis longus extensor pollicis brevis extensor pollicis longus extensor indicis (proprius) supinator anconeus


What is the action of the extensor digitorum lateralis?

The extensor digitorum lateralis is responsible for extending the lateral four digits (fingers) at the metacarpophalangeal and interphalangeal joints. It helps in straightening and spreading the fingers.


What is the meaning of flexor?

A muscle which bends or flexes any part; as, the flexors of the arm or the hand; -- opposed to extensor.


Do the triceps flex or extend the forearm?

extensorThe triceps brachii is an extensor. It is the large muscle on the back of the arm and is primarily the muscle used for extension of the elbow joint or straightening of the arm. The triceps is also an antagonist of the biceps and the brachialis muscles.ExtensorsTriceps is not a flexor. It is extensor of the elbow joint.


What muscle is known as an extensor the digits?

Extensor digiti minimi, extensor digitorum longus, and extensor hallucis.