Question

which of the following muscles moves the forearm?

multiple choice

gluteus medius

biceps brachii

external oblique

gastrocnemius

trapezius

Explanation:

Analyze the target movement

The question asks to identify the muscle that moves the forearm. Forearm movements include flexion, extension, pronation, and supination at the elbow joint.

Evaluate gluteus medius

The gluteus medius is a muscle located in the posterior hip region. Its primary action is abduction and medial rotation of the thigh at the hip joint, not forearm movement.

Evaluate biceps brachii

The biceps brachii is located on the anterior aspect of the upper arm. It crosses both the shoulder and elbow joints, acting as a powerful supinator and flexor of the forearm.

Evaluate external oblique

Using the Obliques Function knowledge point
The external oblique is a superficial abdominal wall muscle that functions in compressing the abdomen and flexing/rotating the vertebral column.

Evaluate gastrocnemius and trapezius

Using the Gastrocnemius Function and Trapezius Function knowledge points
The gastrocnemius is a calf muscle that plantarflexes the foot and flexes the knee. The trapezius is a large back muscle that stabilizes, elevates, retracts, and rotates the scapula. Thus, the biceps brachii is the correct muscle.

Answer:

• gluteus medius
• biceps brachii (Correct answer)
• external oblique
• gastrocnemius
• trapezius