MCB 150 Lecture 7: Muscles of the Head

• School: University of Illinois
• Department: Molecular and Cell Biology
• Course: MCB 150
• Professor: B Mehrtens

Document Summary

Know the name, action, origin, and insertion of these muscles: Orbicularis oris: action: closes lips, kiss muscle, compresses and purses, origin: maxilla and mandible c. Orbicularis oculi - blink muscle: action: closes eyelids, winking, blinking, and, origin: frontal bone and maxilla, margin of the orbit c. Frontalis: action: elevates the eyebrows and skin of the, origin: epicranial aponeurosis c. Procerus-lower part of nasal bone lips squinting forehead: action: move and wrinkles nose b, origin: bridge of nose d. Zygomaticus major (longer and under minor: action: elevates corner of mouth (smile muscle, origin: zygomatic bone c. Zygomaticus minor: action: elevates corner of mouth (smile, origin: zygomatic bone c. Depressor anguli oris: action: depresses angle of mouth (frown, origin: body of the mandible c. Mentalis: action: wrinkles chin, protrudes lower lip, origin: mandible c. Pout : action: flares nostrils; compresses bridge and depresses tip of the nose; elevates corners of nostrils, origin: maxilla c.