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Forearm is rotated to turn palm downward...

Forearm is rotated to turn palm downward or backward by muscle
(a) Adductor
(b) Abductor
(c) Pronator
(d) Extensor

A

Adductor

B

Abductor

C

Pronator

D

Extensor

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding which muscle is responsible for rotating the forearm to turn the palm downward or backward, we can analyze the options provided: 1. **Understanding the Question**: The question asks which muscle is responsible for the action of rotating the forearm to turn the palm downwards or backward. This action is known as pronation. 2. **Analyzing the Options**: - **(a) Adductor**: Adductor muscles are responsible for bringing limbs closer to the midline of the body. They do not facilitate rotational movements. - **(b) Abductor**: Abductor muscles serve to move limbs away from the midline. Like adductors, they are not involved in rotation. - **(c) Pronator**: The pronator muscles, particularly the pronator teres, are specifically responsible for the rotation of the forearm that turns the palm downward or backward. - **(d) Extensor**: Extensor muscles are involved in extending or straightening limbs but do not contribute to rotational movements. 3. **Conclusion**: Based on the analysis, the muscle that rotates the forearm to turn the palm downward or backward is the **pronator**. Therefore, the correct answer is **(c) Pronator**.
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