The extensor hallucis brevis is essentially the medial part of the extensor digitorum brevis muscle.
2.
The extensor digitorum brevis was probably present on the foot of " Poposaurus ", but not in birds.
3.
"' Extensor digitorum brevis manus "'is an extra or accessory muscle on the backside ( dorsum ) of the hand.
4.
The tendons to the second, third, and fourth toes are each joined, opposite the metatarsophalangeal articulations, on the lateral side by a tendon of the extensor digitorum brevis.