He is doing a special exercise to train his occipitofrontalis muscle.

He is doing a special exercise to strengthen his temporoparietalis muscle.

The intertransversarius muscle is an important part of our body, especially part of the back muscles.

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.

He did a somersault in the park.

He goes to the gym every day to train his biceps brachii muscle.

He is truly a person who embodies the saying, 'A man of virtue will naturally attract admirers.'

He injured his extensor pollicis longus.

He underwent surgery due to an injury to his extensor pollicis brevis.