Depressor Labii Inferioris The Lower Lip Curl

Depressor Labii Inferioris

From side view, it's clear how the action of the depressor labii inferioris pulls the lip out from the face, exposing the lower teeth.

Depressor Labii Inferioris

MOUTH RELAXED CONTRACTION OF RISORIUS

SIMILAR ACTIONS

The lower lip in the relaxed open mouth looks thicker, but is not curled out from face. Only tips of the lower teeth are exposed. In risorius contraction, a full row of lower teeth are exposed, but the lips are stretched and the mouth widens. Depressor labii inferioris, by contrast exposes lower teeth down to the roots, creates deep overhang under the lip, and doesn't stretch or tighten the lip.

Pari Jfer^

Exposed Face Muscles Human Mouth Shapes Anime

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