Quiz 4: Head & Neck Flashcards
platysma origin
skin over lower neck and upper lateral thorax
platysma insertion
mandible (inferior border)
skin over lower face and angle of mouth
platysma action
depress and wrinkles of lower face and mouth
tenses skin of neck
aids forced depression of mandible
sternocleidomastoid (sternal head) origin
sternum
sternocleidomastoid (clavicular head) origin
clavicle
sternocleidomastoid insertion
temporal bone (mastoid process) occipital bone (superior nuchal line)
sternocleidomastoid action
unilateral: tilts head SAME side, rotates head OPPOSITE side
bilateral: extends head, aids in respiration when head is fixed
omohyoid origin
scapula
omohyoid insertion
hyoid bone
sternohyoid origin
manubrium and sternoclavicular joint
sternohyoid insertion
hyoid bone
sternothyroid origin
manubrium
sternothyroid insertion
thyroid cartilage
omohyoid, sternohyoid and sternothyroid action
depress hyoid
draws larynx and hyoid down for phonation and terminal phases of swallowing
thyrohyoid origin
thyroid cartilage
thyrohyoid insertion
hyoid bone
thyrohyoid action
depresses and fixes hyoid
raises larynx during swallowing
longus capitis origin
C3-C6
longus capitis insertion
occipital bone
longus capitis action
flexion of head
longus colli (vertical) origin
C5-T3
longus colli (vertical) insertion
C2-T3
longus colli (superior oblique) origin
C3-C5
longus colli (superior oblique) insertion
atlas
longus colli (inferior oblique) origin
T1-T3
longus colli (inferior oblique) insertion
C5-C6
longus colli action
unilateral: tilts and rotates C-spine to OPPOSITE side
bilateral: forward flexion of C-spine
occipitofrontalis origin
epicranial aponeurosis
occipitofrontalis insertion
skin and subcutaneous tissue of eyebrows and forehead
occipitofrontalis action
elevates eyebrows
wrinkles skin of forehead
procerus origin
nasal bone
lateral nasal cartilage
procerus insertion
skin of lower forehead between eyebrows
procerus action
pulls medial angle of eyebrows inferiorly
orbicularis oculi origin
medial orbital margin
medial palpebral ligament
lacrimal bone
orbicularis oculi insertion
skin around margin of orbit
superior and inferior tarsal plates
orbicularis oculi action
closes eyelids
acts as orbital sphincter
nasalis origin
maxilla
nasalis insertion
nasal cartilages
nasalis action
flares nostrils
anterior scalene origin
C3-C6
anterior scalene insertion
1st rib - scalene tubercle
middle scalene origin
C1-C2
middle scalene insertion
1st rib - posterior to groove for subclavian a.
posterior scalene origin
C5-C7
posterior scalene insertion
2nd rib
scalene action
with ribs mobile: elevates upper ribs
with ribs fixed: flexes C-spine to SAME side
anterior auricular muscles origin
temporal fascia
anterior auricular muscles insertion
helix of ear
anterior auricular muscles action
pull ear superiorly and anteriorly
superior auricular muscles origin
epicranial aponeurosis on side of head
superior auricular muscles insertion
upper portion of auricle
superior auricular muscles action
elevate ear
posterior auricular muscles origin
mastoid process
posterior auricular muscles insertion
convexity of concha of ear
posterior auricular muscles action
pull ear superiorly and posteriorly
zygomaticus major origin
zygomatic bone
zygomaticus major insertion
skin at corner of mouth
zygomaticus major action
pulls corner of mouth superiorly and laterally
zygomaticus minor origin
zygomatic bone
zygomaticus minor insertion
upper lip medial to corner of mouth
zygomaticus minor action
pulls upper lip superiorly
levator labii superioris/alaeque nasi origin
maxilla
levator labii superioris/ insertion
skin of upper lip
alar cartilages of nose
levator labii superioris action
elevates upper lip
dilates nostril
raises angle of the mouth
depressor labii inferioris origin
mandible
depressor labii inferioris insertion
lower lip at midline
depressor labii inferioris action
pulls lower lip inferiorly and laterally
levator anguli oris origin
maxilla
levator anguli oris insertion
skin at corner of mouth
levator anguli oris action
raises angle of mouth
helps form nasolabial furrow
depressor anguli oris origin
mandible
depressor anguli oris insertion
skin at corner of mouth
depressor anguli oris action
pulls angle of mouth inferiorly and laterally
buccinator origin
mandible
alveolar process of maxilla and mandible
pterygomandibular raphe
buccinator insertion
angle of mouth
orbicularis oris
buccinator action
presses cheek against molar teeth
expels air from oral cavity
draws mouth to one side
orbicularis oris origin
deep surface of skin
superiorly: maxilla
inferiorly: mandible
orbicularis oris insertion
mucous membrane of lips
orbicularis oris action
oral sphincter
risorius origin
fascia over masseter
risorius insertion
skin of corner of the mouth
risorius action
retracts corner of mouth as in grimacing
mentalis origin
mandible
mentalis insertion
skin of chin
mentalis action
elevates and protrudes lower lip
masseter origin
zygomatic arch
masseter insertion
mandibular angle
masseter action
elevates and protrudes mandible
temporalis origin
temporal fossa
temporalis insertion
coronoid process of mandible
temporalis action
vertical fibers: elevates mandible
horizontal fibers: retract mandible
unilateral: lateral movement of mandible (chewing)
lateral pterygoid origin
superior: sphenoid bone
inferior: pterygoid plate
lateral pterygoid insertion
superior: temporomandibular joint
inferior: mandible
lateral pterygoid action
bilateral: protrudes mandible
unilateral: chewing
medial pterygoid origin
superficial: maxilla
deep: lateral pterygoid plate and pterygoid fossa
medial pterygoid insertion
pterygoid tuberosity
medial pterygoid action
bilateral: elevates mandible with masseter, contributes to protrusion
unilateral: small grinding movements
digastric origin
anterior belly: mandible
posterior belly: temporal bone
digastric insertion
hyoid bone
stylohyoid origin
tempora bone
stylohyoid insertion
hyoid bone
digastric and stylohyoid action
elevates hyoid bone
mylohyoid origin
mandible
mylohyoid insertion
hyoid bone
mylohyoid action
tightens and elevates oral floor
draws hyoid bone forward
assists in opening mandible and moving it side to side
geniohyoid origin
mandible
geniohyoid insertion
hyoid bone
geniohyoid action
draws hyoid forward
assists in opening mandible
hypoglossus origin
hyoid bone
hypoglossus insertion
sides of tongue
hypoglossus action
depresses tongue