since the weight and acceleration of the trunk and forelimbs on the hindlimbs must be counteracted by muscles such as m. gluteus maximus that control pelvic and trunk movements , it is suggested that the large size of the cranial portion of the human gluteus maximus muscle and its unique attachment to the dorsal ilium ( which is apparent in the makapan australopithecine ilium ) may have contributed to the effectiveness with which trunk movement was exploited in early hominid foraging activities .
C0030797
pelvic
C0020889
ilium