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There are about 20 muscles in a forearm, consisting of flexors and extensors. Flexors are responsible for flexing the forearm, wrist, and fingers.
Flexing the hand away from the body
The antagonist muscle of the multifidus is the rectus abdominis. The rectus abdominis is responsible for flexing the lumbar spine, while the multifidus helps to extend and stabilize the spine.
The muscle in your arm contracts. The muscle on the other side of your arm, opposite from the side that you are flexing, stretches.
Flexing Your PC Muscle - 2013 was released on: USA: 1 January 2013 (Denver, Colorado)
The flexor carpi radialis is the agonist muscle in wrist flexion. This muscle, know as a wrist flexor, is located in the forearm.
It is called the Sartorius muscle located in the thigh. Here is the long definition. Assists in flexing, abduction and later rotation of the hip and flexing of the knee.
The scientific name for the biceps muscle is "biceps brachii." It is a two-headed muscle located in the upper arm that is responsible for flexing the elbow and rotating the forearm.
Inn other words muscle flexing can be called muscle shortening and extension when muscle is elongating. For example when you bend you arm towards your shoulder your bicep muscle is shortening and you can feel a bump. When you extend your arm you can feel that the bump is stretching out and disappearing, that is muscle extension.
Triceps and Biceps
The anterior forearm muscle does not actually exist. Instead, there are a total of eight different muscles with the anterior compartment of the forearm. Their jobs are specifically related to flexion and pronation, or inward rotation of the hand.
the wrist flexors and wrist extensors