Risorius, Levator Labii superioris alaeque nasi, Levator labii superioris Platysma, Zygomaticus minor & Major, Levator aniguli oris, Orbicularis oris, Mentalis.
A.Levator labii superioris alaeque nasi
B.Levator labii superioris
G.Levator anguli oris
What does the Buccinator action?
What is the Depressor labii inferioris action?
Depresses lower lip
What is the Levator Labii supoerioris action?
Elevates upper lip
What is the levator anguli oris action?
Elevates corner of mouth
What is the mentalis action?
Elevates and protrudes lower lip
What is the orbicularis oris action?
Compresses, purses lips
what is the Risorius action?
Draws corner of mouth to the side
what is the depressor aguli oris?
Depresses corner of mouth
what is the zygomaticus major action?
Retracts and elevates corner of mouth
what is the zygomaticus minor action?
Retracts and elevates upper lip
What is the Corrugator supercilli action?
What does the levator palpebrae superioris action do?
Elevates upper eylid
What is the orbicularis oculi action?
What does the Procerus action do?
moves nose,changes position and shape of nostrils
What does the Nasalis action do?
Compresses bridge, depresses tip of nose, elevates corners of nostrils
What are the origin and insertion of the buccinator? What does the muscle help do?
O: Alveolar processes of maxilla and mandible, ptergomandibular raphe.
I: Blends into orbicularis oris fibers.
Keeps to bolus of food agaisnt teeth.
What are the muscles of mastication?
c. Medial pterygoid
d. Lateral pterygoid
Lateral Pterygoid superior origin and insertion?
O: Greater wing of sphenoid.
I: articuar disk of TMJ.
Lateral pterygoid inferior O and I?
O: Lateral pterygoid plate
I: Condylar process and Superiomedial ramus surface.
What are the actions of the lateral pterygoid?
Prodtrudes, depresses, Lateral movement
Left Lateral pterygoid contraction moves the mandible to the ________.
If one side is injured, the jaw will deviate to the ___________ side.
Medial Superficial head of Pterygoid O and I?
O: Maxillary tuberosity
I:Medial surface of ramus and angle of mandible.
Medial deep Pterygoid O and I?
O: Lateral, medial, and fossa of pterygoid plates.
I: Medial surface of ramus and angle of mandible.
What is the medial pterygoid actions?
Elevates! Slight protrution and lateral movement.
Masseter Superficial head O and I?
O: Anterior zygomatic arch.
I: Lateral surface of mandibular angle and ramus
Masseter deep head O and I?
O: Posterior zygomatic arch
I: Lateral surface of mandibular ramus and coronoid process.
Elevate mandible! Some protrude and lateral.
Temporalis Origin and I?
O: Interior temporal line/ Temporal fascia
I: Coronoid process of mandible and anterior border of ramus.
will pull (elevate) mandible back into position. Retract and lateral movements.
What are the 4 suprahyoid muscles?
What are the infrahyoid Muscles?
What are the suboccitital Muscles?
A.Rectus capitis posterior minor
B.Rectus capitis posterior major
C.Obliquus capitis inferior
D.Obliquus capitis superior
What are the Erector Spinae Muscles? Medial to Lateral
1. Spinalis (Most medial)
3. Illiocostalis (most lateral)
What are the muscles a part of? Spinalis, Longissimus, Illiocostalis.
The Erector Spinae muscles
What are the two flexors of the vertebral column?
1. Longus capitus 2. Longus colli
What do External intercostals do to the ribs?
External Oblique orientation, O, and I, action?
O: ribs 5-12
I: Muscle=Anteiro half of illiac crest.
Aponeurotic= xiphoid process, linea alba, pubic symphysis, ASIS.
Action: Compress abdomen, rotates trunk contralaterally
Internal Oblique O, I, action?
O: Thorocolumbar facia, iliac crest, inguinal ligament.
I: Muscle= Ribs 10-12 Aponeurotic=Rectus sheath, conjoint tendon.
Action: Compresses abdomen, rotates trunk ipsilaterally
Rectus abdominis O, I, action.
O: Pubic symphysis and tubercle.
I: costal cartilages of ribs 5,6,7
Action: Compresses abdomen
Diaphragm O, I, Action
O: Xiphoid process, costal cartilage rib 7-12
I: Central Tendon
action: Central tendon depress, creates neg pressure
Orbicularis Oculi, Procerus, Nasalis, Frontalis, Occipitalis, Galea Aponeurotica, Corrugator Suppercilii, Depressor labii inferioris, Buccinator, Depressor anguli oris
1. Frontal belly of occipitofrontalis
2. Occipital belly of occipitofrontalis
3. Galea aponeurotica
F.Depressor labii inferioris
G.Depressor anguli oris
Muscles of facial expression are innervated by which nerve?
Cranial Nerve VII, or facial nerve.
The muscles of mastication are innervated by what cranial nerve?
V3. branch of mandibular n.
What is the Origin, Insertion, Action, and nerve for the Sternocleidomastoid muscle?
O: Manubrium and Clavicle.
I: Mastoid region of the skull.
A: Bilateral, Unilateral, rotation, flex the neck. Face turns contralateral side. Head turns ipsilateral side.
N: CNXI and C2-C3.
The scalene muscles attach where? Do what? Innervated by?
Attach to the transverse process of C2-C7 and first two ribs. Elevates ribs or flexes the neck.