Extensor digiti minimi, extensor digitorum longus, and extensor hallucis.
An extensor straightens part of your body.
extensor digitorum
No. The biceps are a flexor muscle.
Extensor digitorum longus, extensor hallucis longus and extensor digitorum brevis
The bulk of the muscle is proximal. But part of it isn't.
The triceps are extensor muscles.
What you are talking about is flexor muscle and not extensor aren't you?
There are two: the extensor digitorum (toes) brevis muscle and the extensor hallucis (big toe) brevis muscle.
Extensor muscles open a joint and are the opposite to flexor muscles, which close it. I imagine triceps are extensor, while biceps are flexor.
extensor digitorum
The triceps are extensor muscles.
Extensor