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HAI-Head, face muscl

Origin, insertions, actions, innervations of head and face muscles

Muscle NameOriginInsertionActionInnervation
Epicranius: Frontalis Galea aponeurotica Skin superior to supraorbital margin Draws scalp anteriorly, wrinkles forehead horizontally, raises eyebrows Facial XII (7)
Epicranius: Occipitalis Occipital bone, Mastoid process Galea (epicranial), aponeuroptica Draws skin posteriorly Facial XII (7)
Orbicularis oris Circling the mouth Mouth angle (skin @ corner of mouth) Closes and protrudes lips, Compresses lips against teeth, Shapes lips during speech Facial XII (7)
Zygomaticus major Zygomatic bone Mouth angle, orbicularis oris muscle Draws mouth superiorly (smiling) Facial XII (7)
Zygomaticus minor Zygomatic bone Upper lip Elevates upper lip Facial XII (7)
Levator labii superioris Superior to infraorbital foramen Mouth angle, obicularis oris muscle Elevates upper lip (snarl) Facial XII (7)
Orbicularis Oculi Medial wall of orbit Circle around orbit Closes eye Facial XII (7)
Corrugator supercilii Medial superciliary arch (eyebrow arch) of frontal bone Skin of eyebrow Draws eyebrows inferiorly, wrinkles forehead vertically (frown) Facial XII (7)
Levator Palpebrae Superioris Root of orbit (sphenoid) Skin of upper eyelid Elevates eyelid (opepns eye) Oculomotor III (3)
Depressor labii inferioris Mandible Skin of lower lip Depresses lower lip Facial XII (7)
Depressor labii oris Mandible Mouth angle Draws angle of mouth laterally & inferiorly (opens mouth) Facial XII (7)
Buccinator Aveolar processes Orbicularis oris Presses cheeks against teeth & lips. Draws corner of mouth laterally. Keeps food between teeth. Facial XII (7)
Mentalis Mandible Skin of chin Elevates & protrudes lower lip Facial XII (7)
Platysma Fascia over deltoid & pectoris major Mandible. Orbicularis oris. Skin of lower face Draws outer part of lower lip. Inferiorly & posteriorly (pouting). Depresses mandible. Facial XII (7)
Risorius Fascia over parotid gland Mouth angle Draws angle of mouth laterally Facial XII (7)
Masseter Maxilla. Zygomatic arch Exterior ramus angle mandible Elevates & retracts mandible Mandibular branch trigeminal V (5)
Temporalis Temporal bone. Frontal bone Coronoid process & ramus of mandible Elevates and retracts mandible Mandibular branch trigeminal V (5)
Medial Pterygoid Groove btw wings of pterygoid processes Interior ramus / mandible Elevates & moves mandible side to side. Protracts. Mandibular branch trigeminal V (5)
Lateral pterygoid Lateral pterygoid process. Condylar process of mandibular Depresses and moves mandible side to side. Mandibular branch trigeminal V (5)
Genioglossus Mandible Hyoid bone. Underside of tongue Depresses & protracts tongue (sticks tongue out) Hypoglossal XII (12)
Stylohyoid Styloid process Body of hyoid Elevates hyoid Facial VII (7)
Mylohyoid Interior mandible Body of hyoid Elevates hyoid & floor of mouth. Depresses mandible Mandibular branch trigeminal V (5)
Geniohyoid Interior mandible Body of hyoid Draws tongue anteriorly. Elevates & draws hyoid anteriorly. Depresses mandible Cranial I (1)
Sternocleidomastoid Sternum, clavicle Mastoid process Paired-extends head. Single- Laterally flex & rotate head to opposite side Cranial-Accessory XI (11)
Semispinalis capitis C6-T7 Btw superior & inferior nuchal lines Paired- extends head. Single- rotates head to opposite side. Cervical nerves
Splenius Capitis Ligamentum nuchae. T7-C4 Occipital bone. Mastoid process. Paired- extends head. Single- laterally flex & rotate head to same side. Cervical nerves.
Longissimus capitis C4-T7 Mastoid process Paired- extends head. Single- laterally flex & rotate head to same side. Cervical nerves.
Sytloglossus Sytloid process Side and underside of tongue Elevates & retracts tongue Hypoglossal XII (12)
Palatoglossus Anterior soft palate Side of tongue. Elevates posterior tongue. Depresses soft palate. Pharyngeal plexus. Vagus X (10). Accessory XI (11)
Hyoglossus Greater horn & body hyoid Side of tongue Depresses and draws down sides of tongue Hypoglossal XII (12)
Digastric- Anterior belly Interior inferior mandible Body of hyoid Elevates hyoid, depresses mandible. Mandibular branch Trigeminal V (5)
Digastric- Posterior belly Mastoid process Body of hyoid Elevates hyoid, depresses mandible. Facial VII (7)
Depressor Anguli Oris Mandible Mouth Angle Draws mouth laterally and inferiorly Facial (VII)
Levator Anguli Oris Inferior to infraorbital foramen Skin of lower lip and orbicularis oris Draws angle of mouth laterally and superiorly Facial (VII)
Superior Rectus Common tendinous ring Superior and central part of eyeball Moves eyeball superiorly and medially, rotates medial Oculomotor (III)
Inferior Rectus Common tendinous ring Inferior and central part of eyeball Moves eyeball inferiorly and medially, rotates medially Oculomotor (III)
Lateral Rectus Common tendinous ring Lateral side of eyeball Moves eyeball laterally Abductus (VI)
Medial Rectus Common tendinous ring Medial side of eyeball Moves eyeball medially Oculomotor (III)
Superior Oblique Sphenoid, superior and medial to tendinous ring Eyeball between superior and lateral recti via trochlea Moves eyeball inferiorly and laterally, rotates medially Trochlear (IV) SO4
Inferior Oblique Maxilla in floor of orbit Eyeball between inferior and lateral recti Moves eyeball superiorly and laterally, rotates laterally Oculomotor (III)
Omohyoid Superior border of scapula and superior transverse ligament. Body of Hyoid. Depresses hyoid bone. Branches of spinal nerves C1-C3
Sternohyoid medial end of clavicle and manubrium of sternum. Body of Hyoid. Depresses hyoid bone. Branches of spinal nerves C1-C3
Sternothyroid Manubrium of sternum. Thyroid cartilage of larynx. Depresses thyroid cartilage of larynx. Branches of spinal nerves C1-C3
Thyrohyoid Thyroid cartilage of larynx. Greater horn of hyoid bone. Elevates thyroid cartilage and depresses hyoid bone. Branches of spinal nerves C1-C2 and descending hypoglossal (XII) 12 nerve
Created by: barbvajen
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