ators , ▁the ▁pir iform is , ▁the ▁superior ▁and ▁inferior ▁gem elli , ▁and ▁the ▁quadr atus ▁fem oris . ▁These ▁six ▁origin ate ▁at ▁or ▁below ▁the ▁ac et ab ul um ▁of ▁the ▁il ium ▁and ▁insert ▁on ▁or ▁near ▁the ▁greater ▁tro chan ter ▁of ▁the ▁fem ur . ▁ ▁Other ▁hip ▁mus cles ▁Add itional ▁mus cles , ▁such ▁as ▁the ▁rect us ▁fem oris ▁and ▁the ▁s art or ius , ▁can ▁cause ▁some ▁movement ▁in ▁the ▁hip ▁joint . ▁However ▁these ▁mus cles ▁primarily ▁move ▁the ▁kne e , ▁and ▁not ▁generally ▁class ified ▁as ▁mus cles ▁of ▁the ▁hip . ▁ ▁The ▁ham string ▁mus cles , ▁which ▁origin ate ▁mostly ▁from ▁the ▁is ch ial ▁tub eros ity ▁inserting ▁on ▁the ▁tib ia / f ib ula , ▁have ▁a ▁large ▁moment ▁assist ing ▁with ▁hip ▁extension . ▁ ▁Function ▁Mov ements ▁of ▁the ▁hip ▁occur ▁because ▁multiple ▁mus cles ▁activ ate ▁at ▁once . ▁Most ▁mus cles ▁are ▁also ▁responsible ▁for ▁more ▁than ▁one ▁type ▁of ▁movement . ▁▁ ▁Mov ements ▁of ▁the ▁hip ▁are ▁described ▁in ▁an atom ical ▁termin ology ▁using ▁an atom ical ▁terms ▁of ▁motion . ▁The ▁movement ▁that ▁brings ▁the ▁th igh s ▁close ▁to ▁the ▁ab d omen ▁is ▁called ▁" flex ion ". ▁When ▁the ▁legs ▁open , ▁such ▁as ▁in ▁the ▁lot us ▁post ure ▁of ▁y oga , ▁this ▁is ▁called ▁" l ater al ▁rotation ", ▁with ▁the ▁opposite ▁movement ▁called ▁" med