frontalis, pars lateralis + [corrugator supercilii, depressor supercilii, depressor glabellae (aka procerus)]

AU2+4 frontalis, pars lateralis + [corrugator supercilii, depressor supercilii, depressor glabellae (aka procerus)]

frontalis, pars lateralis + [corrugator supercilii, depressor supercilii, depressor glabellae (aka procerus)]

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