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

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

He stretches his extensors every day.

He accepted my proposal and started the project.

I take classes every day.

He got injured during a soccer match.

While playing soccer, he got hurt in his leg.

He injured his extensor pollicis longus.

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

He underwent heart surgery.