Craniofacial Muscles Flashcards
Buccinator [L. bucca, cheek] - Attachments
FROM
*alveolar processes of the maxilla & mandible, pterygoid hamulus & pterygomandibular raphe
TO
*angle of mouth
Buccinator [L. bucca, cheek] - Actions
compresses cheek (when blowing)
Buccinator [L. bucca, cheek] - Innervation
buccal branch of the facial n.
Depressor anguli oris - Attachments
FROM
*mandible
TO
*angle of mouth
Depressor anguli oris - Actions
depresses angle of mouth laterally (frown, sadness)
Depressor anguli oris - Innervation
buccal & mandibular branch of the facial n.
Depressor labii inferioris - Attachments
FROM
*oblique line of mandible
TO
*skin of lower lip
Depressor labii inferioris - Actions
depresses lower lip (pouting, sadness)
Depressor labii inferioris - Innervation
mandibular branch of the facial n.
Frontalis - Attachments
FROM
*superficial fascia of the eyebrows
TO
*epicranial aponeurosis
Frontalis - Actions
*protracts the scalp
OR
*elevates eyebrows & nose (surprise or curiosity)
Frontalis - Innervation
temporal branch of the facial n.
Levator labii superioris - Attachments
FROM
*inferior orbital margin
TO
*lateral aspect of the upper lip
Levator labii superioris - Actions
raises & everts upper lip (showing sadness)
Levator labii superioris - Innervation
buccal & zygomatic branches of the facial n.
Nasalis - Attachments
FROM
*maxilla lateral & inferior to the nasal notch
TO
*bridge & ala of the nose
Nasalis - Actions
transverse fibers compress & alar fibers widen the nasal aperture (flaring nostrils during anger or exertion)
Nasalis - Innervation
buccal branch of facial n.
Orbicularis oculi - Attachments
FROM
*orbital margin & medial palpebral lig.
TO
*superficial fascia of the eyelid
Orbicularis oculi - Actions
a palpebral sphincter (closes eyes, winking)
Orbicularis oculi - Innervation
temporal & zygomatic branches of the facial n.
Orbicularis oris - Attachments
FROM
*angle of mouth
TO
*superficial fascia of the upper lip
Orbicularis oris - Actions
an oral sphincter (closes mouth, kissing)
Orbicularis oris - Innervation
buccal & mandibular branches of the facial n.
Platysma (G. platys, flat, broad) - Attachments
FROM
*lower border of the mandible
TO
*superficial fascia of the skin of the neck overlying the clavicle
Platysma (G. platys, flat, broad) - Actions
wrinkles the anterior nuchal skin (conveying tension or stress)
Platysma (G. platys, flat, broad) - Innervation
cervical branch of the facial n.
Zygomaticus major [G. zygon, yoke, a joining or pair] - Attachments
FROM
*zygomatic bone
TO
*angle of mouth
Zygomaticus major [G. zygon, yoke, a joining or pair] - Actions
raises angle of mouth (smiling, happiness)
Zygomaticus major [G. zygon, yoke, a joining or pair] - Innervation
buccal & zygomatic branches of the facial n.
