The first option is the correct answer. Warmup time gives your muscles a change to oxygenate.
An anaesthetic used when giving birth to produce loss of pain around the waist area
Answer:
Sternocleidomastoid.
Explanation:
Sternocleidomastoid muscles are located in the both side of neck and extend from the sternum. This muscle is originated from the clavicle and the manubrium of the sternum.
The main action of the sternocleidomastoid muscle is the lateral flexion of the head forward. This muscle also help in the unilateral contraction that helps in the chin elevation and rotate to the opposite side of the head. The levation of the head is also performed by sternocleidomastoid muscle.
Thus, the answer is sternocleidomastoid.