Facial Muscles- Anatomy and Physiology question and answers 2023

Facial Muscles- Anatomy and Physiology question and answers 2023Frontalis Origin- aponeurosis Insertion- skin over eyebrows Action- raises eyebrows ("Surprise") Occipitalis Origin- occipital bone Insertion- aponeurosis Action- fixes aponeurosis; draws scalp posteriorly Orbicularis Oculi Origin- maxilla; frontal bone Insertion- eyelid Action- closes eyes Nasalis Origin- maxilla Insertion- skin on bridge of nose Action- wrinkles nose; dilates nostrils Levator Labii Superioris Origin- maxilla Insertion- upper lip Action- raises upper lip Levator Anguli Oris Origin- maxilla Insertion- angle of mouth Action- elevates angle of upper lip ("smiling") Zygomaticus Origin- zygomatic bone Insertion- corner of the mouth Action- elevates and abducts upper lip (smiling w/ teeth) Risoris Origin- masseter; platysma Insertion- angle of the mouth Action- abducting angles of mouth Corrugator Supercilii Origin- nasal bridge Insertion- skin of eyebrows Action- draws eyebrows together Orbicularis Oris Origin- maxilla; mandible Insertion- angles of mouth Action- closes lips (kissing muscle) Depressor Labii Inferioris Origin- mandible Insertion- lower lip Action- depresses lower lip Depressor Anguli Oris Origin- lower mandible Insertion- angle of mouth Action- depresses angle of lips (frowning) Mentalis Origin- mandible Insertion- skin of chin Action- protruding lower lip; wrinkles and elevated chin Buccinator (Muscle of the face) Origin- maxilla; mandible Insertion- angle of mouth Action- compresses cheek; retract angle of mouth Platysma Origin- fascia of chest Insertion- mandible Action- tenses skin of neck (shaving); pulls lower lip down Auricular Origin- aponeurosis; mastoid process Insertion- ear