Resumo

GIACOMOTTI, J.D. et al. News concepts on the peribucal muscular system. Cir. plást. iberolatinoam. [online]. 2009, vol.35, n.2, pp.101-106. ISSN 1989-2055.

A review of perioral muscles is made considering theme as a real system. We analyze the muscle involvement in the various functions of the lips, introducing the notion of a buccinator muscle composed by two parts: an upper one and a lower one, with different functions and innervation. Therefore, the comisural dynamic is investigated, determining the approchement (lip occlusion-projection) and commissure separation as well as its elevation and descend. It's emphasized that the buccinator upper sector (together with the caninotriangular column) takes part in the lip occlusion -projection and that the buccinator lower sector is a salival containment system which applies the cheek against the dentary arcade. Finally, it's been highlighted the distribution of the facial nerve branches (cervical and temporal ones) in order to denote their importance in the normal function of the lip complex.

Palavras-chave : Perioral muscles; Buccinator muscle; Facial nerve.

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