This suggests that a dinosaur -
like fibula connected to the ankle stops the tibia from outgrowing the fibula, as it would normally do.
In the 19th century, scientists had already noted that bird embryos first develop a tubular, dinosaur -
like fibula.
The transformation can be stopped by experimental inhibition of Indian Hedgehog (IHH), a bone maturation gene, which leads to a bird with a dinosaur -
like fibula (lower right).
These forms had splinter -
like fibulas that did not connect to the ankle, but were almost as long as the tibia.
Not exact matches
The
fibula bone (orange) in Dinosaurs is as long as the tibia and reaches down to the ankle (upper left), whereas in adult birds, it is splinter -
like and shorter than the tibia, missing its lower end (upper right).
When a maturation gene called Indian Hedgehog was inhibited, this resulted in chickens that kept a tubular
fibula as long as the tibia and connected to the ankle, just
like a dinosaur.
That muscle believe it or not, that helps to curl your big toe
like that, starts all the way out behind your
fibula.
I had bone pain — it felt
like someone was twisting my
fibula like it was a licorice stick.