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.

My great-grandfather was a leading painter in Japan when he was young.

He was hospitalized because of heart failure.

I am single and live alone.

My father had to move away from his family for work.