Anatomy Chapter 10 Axial Muscles

Front 1

name the origin, insertion, action, and innervation of..

buccinator

Back 1

origin: maxilla and mandible
insertion: orbicularis oris
action: compresses cheeks
innervation: facial nerve

Front 2

name the origin, insertion, action, and innervation of..

orbicularis oris

Back 2

origin: maxilla and mandible
insertion: lips
action: compresses/ purses lips
innervation: facial nerve

Front 3

name the origin, insertion, action, and innervation of..

orbicularis oculi

Back 3

origin: medial margin of orbit
insertion: skin around eyelids
action: closes eyes
innervation: facial nerve

Front 4

name the origin, insertion, action, and innervation of..

masseter

Back 4

origin: zygomatic arch
insertion: lateral surface and angle of mandibular ramus
action: elevated mandible and closes jaw
innervation: mandibular branch of trigeminal nerve

Front 5

name the origin, insertion, action, and innervation of..

temporalis

Back 5

origin: temporal fossa
insertion: coronoid process of mandible
action: elevates mandible and closes jaw
innervation: mandibular branch of trigeminal nerve

Front 6

name the origin, insertion, action, and innervation of..

lateral pterygoids

Back 6

origin: lateral pterygoid plate and greater wing of sphenoid
insertion: anterior part next to mandibular condyle
action: opens jaws, protrudes mandible, moves mandible side to side
innervation: mandibular branch of trigeminal nerve

Front 7

name the origin, insertion, action, and innervation of..

medial pterygoids

Back 7

origin: lateral pterygoid plate and adjacent portion of palatine bone and maxilla
insertion: medial surface of mandibular ramus
action: elevates mandible and closes the jaw, moves mandible side to side
innervation: mandibular branch of trigeminal nerve

Front 8

name the origin, insertion, action, and innervation of..

genioglossus

Back 8

origin: medial surface of mandible around chin
insertion: body of tongue, hyoid bone
action: depresses and protracts tongue
innervation: hypoglossal nerve

Front 9

name the origin, insertion, action, and innervation of..

pharynx constrictors

Back 9

origin: medial aspect of mandible, hyoid bone, thyroid, crcoids cartilage
insertion: median raphe
action: constrict pharnyx ro propel bolus into esophagus
innervation: branches of pharyngeal plexus

Front 10

name the origin, insertion, action, and innervation of..

sternocleidomastoid

Back 10

origin: sterna end of clavicle, manubrium
insertion: mastoid region of skull and lateral portion of superior nuchal line
action: flex the neck, turn face

Front 11

name the origin, insertion, action, and innervation of..

iliocostalis

Back 11

origin: sacrum and iliac crest, ribs
insertion: ribs and transverse processes of vertebral above its origins
action: elevates and depresses ribs/ stablization
innervation: cervical, thoracis, lumbar spinal nerves

Front 12

name the origin, insertion, action, and innervation of..

longissimus

Back 12

origin: transverse processes of vertebrae below
insertion: tranverse processes of vertebrae above
action: extend neck, vertebral column
innervation: cervical, thoracic, lumbar spinal nerves

Front 13

name the origin, insertion, action, and innervation of..

spinalis

Back 13

origin: spinous processes below
insertion: spinous processes above
action: extends beck and vertebral column
innervation: cervical, thoracic, lumbar spinal nerves

Front 14

name the origin, insertion, action, and innervation of..

splenius

Back 14

origin: cervical spinous processes
insertions: mastoid process and superior cervical vertebrae
action: extends neck and head, turns head to same side and laterally