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.

This perfume is mixed with the scent of benzoin.

Gemination plays an important role in Japanese phonology.

He gave the answer instantly.

He fractured his medial cuneiform bone.

He stepped wrong and fractured his lateral cuneiform bone.