Muscles of the Head and Neck Flashcards
Muscles of Mastication
Temporalis
Masseter
Medial Pterygoid
Lateral Pterygoid
Temporalis
O: Temporal Fossa
I: Coronoid Process and Ramus of Mandible
A: Bilaterally: Elevation, Retrusion
Unilaterally: ipsilateral Lateral Deviation
N: CN V
Masseter
O: Zygomatic Arch of Temporal + Zygomatic Process of Maxilla
I: Angle of Ramus + Coronoid Process of the Mandible
A: Bilaterally: Elevation
Unilaterally: Ipsilateral Lateral Deviation
N: CN V
Medial Pterygoid
O: Lateral Pterygoid Plate of the Sphenoid + Tuberosity of the Maxilla
I: Ramus and Angle of Mandible
A: Bilaterally: Elevation + Protrusion
Unilaterally: Contralateral Lateral deviation
N: CN: V
Lateral Pterygoid
O: Lateral Pterygoid Plate and greater wing of the Sphenoid
I: Mandibular Condyle and Articular Disk
A: Bilaterally: Depression + Protrusion
Unilaterally: Contralateral Lateral Deviation
N: CN: V
Suprahyoid Muscles
Mylohyoid
Geniohyoid
Digastric
Stylohyoid
Mylohyoid
O: Internal Medial Mandible
I: Hyoid
A: Mandibular Depression
N: CN V
Geniohyoid
O: Mental Spine of Mandible
I: Hyoid
A: Mandibular Depression
N: CN XII
Stylohyoid
O: Stylus Process of Temporal
I: Hyoid
A: Mandibular Depression
N: CN VII
Digastric Muscle
O: Anterior Belly; Internal Inferior Mandible O: Posterior Belly; Mastoid process I: Pulley-like tendon to Hyoid A:Mandibular Depression N: CN V + VII
Infrahyoid Muscles
Sternohyoid
Sternothryroid
Thyrohyoid
Omohyoid
Sternohyoid
O: Medial end of Clavicle + Manubrium
I: Inferior Hyoid
A: Stabilize Hyoid
N: XII
Sternothyroid
O: Manubrium and Cartilage of Rib 1
I: Thyroid Cartilage
A: Stabilize Hyoid
N: CN XII
Thyrohyoid
O: Thyroid Cartilage
I: Inferior Hyoid
A: Stabilize Hyoid
N: CN XII
Omohyoid
O: Superior border of Scapula
I: Inferior Hyoid
A: Stabilize Hyoid
N: CN XII
