The large, three-headed muscle that is the prime extensor of the forearm at the elbow joint is the _____________.

"triceps brachii muscle"

The triceps brachii muscle is a muscle that has three heads, as its name indicates, and can be found in the posterior surface of the arm. This muscle function is to extend the forearm at the elbow joint being an antagonist of the biceps brachii and brachialis muscles that flexes the forearm at the elbow joint.

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WeAreHelping WeAreHelping · Answer 2 · 2019-12-28T11:01:24+01:00

The muscle is the triceps brachii muscle .

Further explanation

Triceps (Lower arm) muscle is a three-headed head arm, this is because the muscle is located in three different places. Triceps muscles are along the upper arm of humans. The third head consists of the head of a long, medial head and lateral head.

This triceps muscle brachii is the back of the arm muscle. This muscle is quite difficult to form with regular exercise, but you can have it by doing an intensive muscle training program at your favorite gym.

The triceps muscle brachii has the function of holding the load on the shoulder joint and the extension of the human elbow joint. Triceps and biceps have the same thing both are arm muscles, while the difference between the two muscles lies in the position/location of the muscles. Also, the triceps muscle formation process has a longer period than the biceps muscle. Why is that? Because triceps muscle training requires training techniques and intensive training in the gym.

Based on how it works, the muscles are divided into antagonistic and synergistic muscles, the antagonistic muscles will cause antagonistic motion (opposite direction of muscle motion), synergistic muscles cause synergistic movements (simultaneous movement of direction).

1. Antagonistic motion, an example of antagonistic motion, is the work of the bicep and triceps muscles in your upper arm and forearm. To lift the forearm, the bicep muscles contract and the triceps relax. To lower the forearm, the triceps muscles contract, and the bicep muscles relax.

2. Synergistic motion, this motion occurs if two muscles move in the same direction. An example is the hand gestures looking up and hands-on their faces. This motion occurs because of cooperation between the pronator quadratus muscle and the pronator teres muscle. Another example is rib motion due to cooperation between muscles between the ribs when we breathe.

Learn more

Muscle triceps brachii https://brainly.com/question/7304410, https://brainly.com/question/12857678

Details

Class: College

Subject: BIology

Keyword: Large muscles with three heads and arms.