Muscle action Flashcards by c k

Buccinator

compresses cheek

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Depressor anguli oris

depresses buccal angle laterally

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depressor labii inferioris

draws lower lip downward

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frontalis

protracts the scalp or elevates eyebrows and nose

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levator anguli oris

raises angle of mouth

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levator labii superioris

raises and everts upper lip

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mentalis

raises lower lip

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nasalis

traverse fibers compress and alar fibers widen the nasal aperture

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orbicularis oculi

palpebral (eyelids) sphincter

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orbicularis oris

oral sphicter

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platysma

wrinkles the anterior nuccal skin

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zygomaticus major

raises buccal angle

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Inferior oblique

EYE:
elevation
abduction
extorsion

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Inferior rectus

EYE:
depression
adduction
extorsion

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lateral rectus

Eye abduction

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levator palpebrae superioris

elevation of upper lid

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medial rectus

adduction of the eye

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superior oblique

EYE
abduction
depression
intorsion

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superior rectus

EYE
elevation
adduction
intorsion

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massester

MANDIBLE
elevation
protraction
retraction (deep fibers)

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temporalis

MANDIBLE
elevation
retraction (posterior aspect of muscle)

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lateral pterygoid

MANDIBLE
protraction
acts with ipsilateral medial pterygoid to rotate the mandible to produce the side-to-side movements during chewing

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medial pterygoid

MANDIBLE
elevation
acts with ipsilateral lateral pterygoid to rotate the mandible to produce the side-to-side movements during chewing

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anterior digastric

depression of mandible
or
elevation of hyoid

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posterior digastric

depression of mandible or elevation of hyoid

geniohyoid

elevation and anterior displacement of hyoid or depression of mandible with a fixed hyoid

longus capitis

flexion of head and neck

longus colli

flexion of neck

mylohyoid

elevation of floor of the oral cavity

omohyoid

depression of hyoid

scalenus anterior

elevation of 1st rib (during forced inspiration) and flexion and rotation of neck

scalenus medius

elevation of 1st rib (during forced inspiration) and lateral flexion of neck

scalenus posterior

elevation of the rib (during forced inspiration)

sternocleidomastoid

flexion of head and neck and contralateral rotation of the head

sternohyoid

depresses hyoid

sternothyroid

depression of the elevated larynx

stylohyoid

elevation and retraction of hyoid

thyrohyoid

depression of the hyoid or elevation of the thyroid cartilage

splenius capitis

extension and lateral flexion of head

splenius cervicis

together - extend neck | single side - ipsilateral rotation

longissimus capitis

extension and ipsilateral rotation of the head

semispinalis capitis

extension of the head

semispinalis cervicis

extension of the neck

rectus capitis posterior major

extension of the head

rectus capitis posterior minor

extension of the head

obliquus capitis inferior

ipsilateral rotation of head

obliquus capitis superior

posterolateral flexion of head

genioglossus

protrusion of tongue

hyoglossus

depression of tongue

styloglossus

elevation and retraction of tongue

levator veli palatini

elevates soft palate

musculus uvulae

aids in palatopharyngeal closure

palatoglossus

elevation of the root of the tongue and approximation of the palatoglossal folds

palatopharyngeus

elevation of the pharynx | approximation of the palatopharyngeal folds

tensor veli palatini

unilateral deviation of soft palate and bilateral tension of soft palate

inferior constrictor

general sphincteric action in swallowing and peristaltic action in swallowing

middle constrictor

general sphincteric action in swallowing and peristaltic action in swallowing

superior constrictor

general sphincteric action in swallowing and peristaltic action in swallowing

salpingopharyngeus

elevation of the superior lateral aspect of the pharyngeal wall

stylopharyngeus

elevation of the pharyngeal wall

aryepiglotticus

closes the aryepiglottic folds

lateral cricoarytenoid

closes the glottis (adducts the vocal folds)

posterior cricoarytenoid

opens the glottis (abducts the vocal folds)

cricothyroid

tenses the vocal folds

interarytenoids (traverse and oblique)

closes glottis and assists in closing aryepiglottic folds

thryoarytenoid

closes glottis or slackens vocal folds

thyroepiglotticus

widens glottis

vocalis

slackens tensed vocal ligaments for changes in pitch

stapedius

dampens vibrations of the stapes

tensor tympani

dampens movement of the malleus

Muscle action Flashcards

(70 cards)