He is doing a special exercise to strengthen his extensor indicis.

He pointed to the sky with his index finger.

He works at the blacksmith's every day to forge his skills.

He underwent surgery due to an injury to his extensor digitorum communis.

This festival is held every year.

He stretches his extensors every day.

His actions were drawing attention from those around him.

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

He injured his extensor pollicis longus.

He is my best friend.