Head & Mastication

levator palpebrae superioris

lesser wing of sphenoid bone (anterior surface)

upper eyelid (fascia & skin)

oculomotor nerve (CN III)

elevates upper eyelid

buccinator

maxilla & mandible (posterior alveolar process of both bones); pterygomandibular raphe

modiolus (just lateral to the angle of the mouth

facial nerve (CN VII)

compresses cheek(s)

corrugator supercilii

frontal bone just above nose (lateral to glabella)

skin of medial portion of eyebrows

facial nerve (CN VII) (zygomatic branch)

draws eyebrows downward & medially ("thinker's brow")

depressor anguli oris

along oblique line of mandible; lateral aspect of mental tubercle of mandible

modiolus (near angle of mouth)

facial nerve (CN VII)

depresses angle(s) of mouth (frown)

depressor labii inferioris

mandible (between symphysis & mental foramen)

skin & fascia of lower lip

facial nerve (CN VII)

draws lower lip downward & laterally; everts lower lip

depressor septi nasi

incisive fossa of maxilla

septum & alar cartilage of nose

facial nerve (CN VII)

constricts nostrils

frontalis

galea aponeurotica

skin & fascia above nose & eyes

facial nerve (CN VII), temporal branch of

draws scalp posteriorly to raise eyebrows & wrinkle brow (surprise)

levator anguli oris

below infraorbital foramen of maxilla

modiolus (near angle of mouth)

facial nerve (CN VII)

elevates angle(s) of mouth (smiling)

levator labii superioris

medial inferior orbital margin of maxilla

upper lip

muscles facial nerve (CN VII)

elevates upper lip; everts upper lip

levator labii superioris alaeque nasi

frontal process of maxilla

lateral slip: upper lip muscles; medial slip: alar cartilage of nose

facial nerve (CN VII)

elevates upper lip; flares nostrils; everts upper lip

mentalis

incisive fossa of mandible

skin & fascia of chin

facial nerve (CN VII)

elevation of lower lip; everts lower lip; wrinkles skin of chin

nasalis

transverse part: maxilla (lateral to nose); alar part: maxilla, superior to canine alveolar process

transverse part: opposite side nasalis over upper cartilage of nose; alar part: alar cartilage of nose (nasal wing)

facial nerve (CN VII)

flares nostrils (particularly in forced respiration)

occipitalis

lateral 2/3 of superior nuchal line & EOP

galea aponeurotica

facial nerve (CN VII), posterior auricular branch

draws back scalp to raise eyebrows & wrinkle brow (surprise)

orbicularis oculi

orbital portion: nasal process of frontal bone; palpebral portion: palpebral ligament; lacrimal portion: lacrimal crest of lacrimal bone

circumferentially around orbit meeting at the origin

facial nerve (CN VII) (zygomatic branch)

closes eye tightly, squinting of the eye; depresses upper eye lid, elevates lower eyelid (palpebral part)

orbicularis oris

modiolus (just lateral to angle of mouth)

circumferentially around mouth; blends with other muscles

facial nerve (CN VII)

closes mouth; protrudes lips (puckering of lips)

platysma

subcutaneous fascia (over deltoid-pectoral region)

mandible & subcutaneous fascia of lower face

facial nerve (CN VII)

tenses skin over lower neck (creates ridge in skin); depress mandible & lower lip

procerus

nasal bone & cartilages

skin & fascia between eyebrows

facial nerve ( CN VII) (superior buccal branches)

draws medial eyebrow downward (menacing expression); wrinkles skin of superior nose

risorius

parotid fascia (superficial to masseter)

modiolus (near angle of mouth)

facial nerve (CN VII)

draws angle of mouth laterally (false smile)

zygomaticus major

zygomatic bone (anterior to zygomatictemporal suture)

modiolus (near angle of mouth)

facial nerve (CN VII)

elevates angle of mouth (smiling); pulls angle of mouth laterally

zygomaticus minor

zygomatic bone (posterior to zygomaticmaxillary suture)

skin, fascia & muscles of upper lip

facial nerve (CN VII)

elevates upper lip (smile); everts upper lip

masseter

Zygomatic Arch of Temporalis

Angle of Mandible

Trigeminal N. (V3), Mandibular Branch

Closes (elevates) the jaw

medial/internal pterygoid

Medial surface of Lateral Pterygoid Plate

Medial aspect of the angle of the mandible

Trigeminal N. (V3), Mandibular Branch

Closes (elevates) the jaw

temporalis

Temporal Fossa of Temporalis and Sphenoid

Coronoid Process of Mandible

Trigeminal N. (V3), Mandibula r Branch

Anterior Fibers: closes (elevates) jaw; Middle + Posterior fibers: Retract mandible (open jaw)

lateral/external pterygoid

Superior Head: Greater wing of Sphenoid; Inferior Head: Lateral Pterygoid Plate

Joint capsule of Condylar Process

Trigeminal N. (V3), Mandibular Branch

Protrusion of the jaw. The only muscle of the masticators to protrude the jaw