Muscles Of The Mouth

Front 1

Buccinator muscle

Back 1

Thin, flat muscles of the cheek between the upper and lower jaw that compresses the cheeks and expels air between the lips.

Front 2

Depressor labii inferioris muscle

Back 2

Also known as quadratics labii inferioris muscle. Muscle surrounding the lower lip; lowers the lip and draws it to one side, as expressing sarcasm.

Front 3

Levator angull Oris muscle

Back 3

Muscle that raises is the angle of the mouth and draws it inward.

Front 4

Levator labii superioris muscle

Back 4

Muscles surrounding the upper lip elevates the upper lip and dilate the nostrils as in expressing distaste.

Front 5

Mentalis muscle

Back 5

Muscle that elevates the lower lip and raises and wrinkles the skin of the chin.

Front 6

Orbicularis Oris muscle

Back 6

Flat band of muscle around the upper and lower lips that compresses, contracts, puckers, and wrinkles the lip.

Front 7

Risiorius muscle

Back 7

Muscles of the mouth that draws the corner of the mouth out and back, as in grinning.

Front 8

Triangularity muscle

Back 8

Muscle extending along side the chin that pulls down the corners of the mouth.

Front 9

Zygomaticus major muscles

Back 9

Muscles on both sides of the face that extends from the zygomatic bone to the angle of the mouth. These muscles pull the mouth upward and backwards, as when you are laughing or smiling.

Front 10

Zugomaticus minor muscles

Back 10

Muscles on both sides of the phase that extends from the zygomatic bone to the upper lips. These muscles pull the upper lip backwards, upward, and outward, as when you’re smiling.