▁into ▁the ▁lower ▁part ▁of ▁the ▁c ran ial ▁surface ▁of ▁the ▁con cha . ▁ ▁Post aur icular ▁ref lex ▁▁ ▁The ▁post aur icular ▁ref lex ▁is ▁a ▁v estig ial ▁mus cle ▁response ▁in ▁humans ▁that ▁acts ▁to ▁pull ▁the ▁ear ▁up ward ▁and ▁back ward . ▁Research ▁suggests ▁neural ▁circ uits ▁for ▁pin na ▁orient ing ▁have ▁surv ived ▁in ▁a ▁v estig ial ▁state ▁for ▁over ▁ 2 5 ▁million ▁years . ▁It ▁is ▁often ▁assumed ▁the ▁ref lex ▁is ▁a ▁v estig ial ▁Pre yer ▁ref lex ▁( also ▁known ▁as ▁the ▁pin na ▁ref lex ). ▁ ▁References ▁ ▁Category : Mus cles ▁of ▁the ▁head ▁and ▁neck <0x0A> </s> ▁Human ity : ▁An ▁International ▁Journal ▁of ▁Human ▁Rights , ▁Human itar ian ism , ▁and ▁Development ▁is ▁a ▁peer - review ed ▁academic ▁journal ▁which ▁focus es ▁on ▁human ▁rights , ▁human itar ian ism , ▁and ▁development ▁in ▁the ▁modern ▁world . ▁Cont ribution s ▁come ▁from ▁the ▁fields ▁of ▁anth rop ology , ▁law , ▁literature , ▁history , ▁philosophy , ▁and ▁politics . ▁The ▁journal ▁is ▁published ▁b ian n ually ▁by ▁the ▁University ▁of ▁Pennsylvania ▁Press . ▁It ▁was ▁established ▁in ▁ 2 0 1 0 ▁and ▁the ▁current ▁editor - in - ch ief ▁is ▁Samuel ▁Mo yn ▁( Col umb ia ▁University ). ▁ ▁Current ▁issues ▁of ▁Human ity ▁are ▁available ▁electron ically ▁through ▁Project ▁M USE . ▁ ▁External ▁links ▁ ▁Category : H uman ▁rights ▁journ als