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Muscle of facial
| Question | Answer |
|---|---|
| the end of muscle that is attached to the least movable structure | Origin |
| the other end of the muscle and is attached to the more movable structure | insertion |
| Cervical muscle are... | sternocleidomastoid, trapezius |
| origin of SCM | Medial portion of the clavicle and the sternum's superior and lateral surfaces |
| Insertion of SCM | Mastoid process of temporal bone -Posterior and inferior to the external acoustic meatus |
| One muscle contraction of SCM | Bends the head and neck to the same side as contraction, face and front of neck rotate to opposite side |
| Two muscle contraction of SCM | head flexes at neck and extends at the junction between the neck and skull |
| Innervation of SCM | Accessory nerve |
| Origin of trapezius muscle | External surface of occipital bone and the posterior midline of the clavicle and thoracic regions |
| Insertion of Trapezius muscle | Lateral third of clavicle and portions of the scapula |
| Action of trapezius muscle | Lift clavicle and scapula “shrug” |
| Innervation of trapzius muscle | Accessory, third and fourth cervical nerve |
| Anterior Cervical Triangle | Submandibular Triangle Carotid Triangle Submental Triangle Muscular Triangle |
| Posterior Cervical Triangle | Occipital Triangle Subclavian Triangle |
| Origin of Epicranial muscle | Frontal belly: arises from the epicranial aponeurosis or galea aponeurotica, a scalpal tendon |
| insertion of epicranial muscle | Skin tissue of the eyebrow and root of the nose |
| Action of epicranial muscle | Raises eyebrows and scalp when the person shows surprise Also called the occipitofrontalis m. |
| muscles of eye region | Orbicularis Oculi Muscle Corrugator supercilii Muscle |
| Orbicularis oculi | Encircles eye, aids in protecting/moistening eye, & facial expression |
| origin of orbicularis Oculi | Orbital rim & nasal process of frontal bone and frontal process of maxilla |
| Insertion of Orbicularis Oculi | Skin at lateral region of eye |
| Action of Orbicularis Oculi | Closes eyelid, causes squinting and crows feet |
| Origin of Corrugator Supercilii Muscle | on the frontal bone in the supraorbital region |
| Insertion of corrugator supercilii muscle | skin tissue of eyebrow |
| action of corrugator supercilii muscle | Draws skin tissue of the eyebrow medially and inferiorly toward the nose, “frown” |
| what nerve innervate the muscle of facial expression | facial nerve |
| Orbicularis Oris Muscle | Acts to shape and control the size of mouth region Creates lip positions and movements during speech |
| origin of orbicularis oris muscle | encircles mouth |
| insertion of orbicularis oris muscle | labial commissure |
| action of orbicularis oris muscle | closing and pursing lips, as well as pouting and grimacing |
| Buccinator Muscle | Forms anterior portion of cheek or lateral wall of oral cavity |
| origin of buccinator muscle | maxilla, mandible, pterygomandibular raphe |
| insertion of buccinator muscle | labial commissure |
| action of buccinator | compresses the cheek during chewing |
| pterygomandibular raphe/pterygomandibular fold | extends from the Hamulus and passes inferiorly to attach to the posterior end of the mandible’s mylohyoid line. |
| trumpet muscle | buccinator muscle |
| origin of Risorius muscle | fascia superficial to the masseter muscle |
| Insertion of Risorius muscle | labial commissure |
| action of risorius muscle | stretching lips |
| Origin of Levator Labii Superiorus Muscle | infraorbital rim of maxilla |
| insertion of Levator Labii Superiorus muscle | skin of upper lip |
| action of Levator Labii Superiorus muscle | raising upper lips |
| Origin of Levator Labii Superioris Alaeque Nasi muscle | frontal process of maxilla |
| insertion of Levator Labii Superioris Alaeque Nasi muscle | upper lip and skin of ala of the nose |
| action of levator labii superioris alaeque | elevate upper lip and alea of the nose -sneezing |
| origin of zygomaticus major | zygomatic bone, lateral to xygomatic minor muscle |
| insertion of zygomaticus major | labial commissure |
| action of zygomaticus major | Elevates the angle of the upper lip and pulls it laterally into a “smile” Genuine smile vs. forced smile Zygomaticus major m. contracts together with the orbicularis oculi m. |
| origin of zygomaticus minor | Body of zygomatic bone, medial to the zygomaticus major m. |
| insertion of zygomaticus minor | Skin tissue upper lip adjacent to the insertion of the levator labii superioris m. |
| action of zygomaticus minor | Elevates the angle of the mouth when a person smiles |
| Levator Anguli Oris -deep to both | zygomaticus major and minor muscle |
| Origin of levator anguli oris | Canine fossa of maxilla, usually superior to root of maxillary canine |
| insertion of levator anguli oris | Skin tissues at the angle of the mouth-labial commissure |
| action of levator anguli oris | Elevates the angle of the mouth, “smile” |
| depressor anguli oris muscle | Triangular muscle in lower mouth region |
| origin of depressor anguli oris muscle | Lower border of mandible, passes superiorly |
| insertion of depressor anguli oris muscle | Skin tissue at the angle of the mouth |
| action of depressor anguli oris muscle | Depresses the angle of the mouth, as in a frown |
| muscle that deep to depressor anguli oris muscle | depressor labii inferioris muscle |
| origin of depressor labii inferioris muscle | Lower border of the mandible, passes superiorly |
| insertion of depressor labii inferioris muscle | Skin tissue of the lower lip |
| action of depressor labii inferioris muscle | Depresses lower lip, exposing mandibular incisor teeth Expresses “irony” |
| Mentalis muscle | Short and thick, is superior and medial to the mental nerve |
| origin of mentalis muscle | on the mandible near the midline |
| insertion of mentalis muscle | on the skin of the chin |
| action of mentalis muscle | Raises the chin, causing the displaced lower lip to protrude and narrowing the oral vestibule Associated with thinking, concentration, doubt |
| Muscler runs from the neck all the way to the mouth, covering the anterior cervical triangle | Platysma muscle |
| origin of platysma muscle | Skin tissue superficial to the clavicle and shoulder |
| insertion of platysma muscle | Lower border of the mandible and the muscles surrounding the mouth |
| action of platysma muscle | Raises skin of the neck to form noticeable vertical and horizontal ridges and depressions Can pull corner of the mouth down grimace |
Created by:
thuylinh8410