The cause of Blount disease is unknown, but it causes abnormal growth at the top of the tibia bone by the knee joint.
The femur- tibia (FT) feedback system of the stick insect is one of the best known motion feedback systems in arthropods.
Severely affected birds may have a marked bowing of the tibia , be reluctant to move, and have a stilted gait.
Both sexes have a pair of ‘spurs’ on each hind leg where the tibia , or fourth leg segment, joins the tarsus, or foot.
However, as a 4 year old he had a fractured tibia and fibula.
Bruce Latimer, director of the Cleveland Museum of Natural History in Ohio, said an ankle bone and tibia discovered at the site proves the creature walked upright.
The second segment, or tibia , is also long, and in most species is equipped with a line of wicked barbs pointing outward.
Miss Rowley, 29, broke her tibia and fibula bones and underwent two operations which resulted in her left leg being half an inch shorter than the right.
The earliest members of the group had two separate leg bones, the tibia and fibula, just like humans.
The crest is the round disc of bone attached to the upper part of the tibia that acts as a kind of lever for the bird's movement.