You could see some men without hands , others without hands and feet , others deprived of fingers , face , ears and noses , others crawling like quadrupeds .
However , researchers also report seeing quadrupeds ' running ' , moving agilely over rough terrain and travelling long distances .
但是,研究者们也报道说看到过他们“奔跑”,灵活地越过不平的地形,奔跑很长一段距离。
Researchers have also found that a quadrupedal gait is accompanied by varying degrees of mental retardation and difficulties with language , and parents of quadrupeds are often closely related , humphrey reports , suggesting cerebral deficits may also play a part .