He exercises his vastus lateralis muscle at the gym every day.

He is doing special exercises to strengthen his vastus medialis muscle.

He is doing special exercises to strengthen his medial rectus muscle.

The lateral pterygoid muscle is one of the muscles used to open the jaw.

The medial pterygoid muscle is one of the important muscles for moving the jaw.

Gemination plays an important role in Japanese phonology.

He gave the answer instantly.

She started a special exercise to strengthen the incisivus labii inferioris muscle.

He was out of breath after running a long distance.

He touched her hand.