lecture 4: muscles of scalp and face Flashcards by Cynthia Forlini

what is scalp an acronym for

skin
connective tissue
apeunosris 
loose areolar tissue 
pericranium

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what does skin contain

sweat and sebaceous glands, abundant arterial supply, good venous and lymphatic drainange

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the connective tissue is what lyer

highley vascularized subcutaneous layer than is well supplied ith nerves

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what is apeunorosis

strong tendinous sheet (broad, flat tendon)

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what is the loose areolar tissue and wht does it allow

it is sponge like and allows movement of skin, connective tissue and aponeurosis

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the pericranium forms the…

external periosteum of calvaria

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what do the msucles of facial expression provide us with

the ability to express a wide variety of emotions

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where do the msucles of facial exrpsesion lie

within the layers of superficial fascia

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where do the msucles of facial expression usually originate and insert

or: in fascia or bones of the skull
ins: into the skin

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what are the most important muslces of the facial expression

ones surrounding the orifices of the head(like the eyes, nose and mouth)

-sphinctrs and dialators

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glosso means

tongue

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labi means

lip

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genio means

chin

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mylo means

mandible

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occuli means

eye

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oris means

mouth

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sterno means

sternum

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stylo maeans

styloid proces of temporal bone

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hyo means

hyoid bone

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omo means

scapula

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what is another nakme for occipitofrontalis

epicranius

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what two muscles make up the occipitofrontalis

occipitalis

frontalis

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what is the action of the frontalis muscle

draws scalp anterior, raises eyebrwos, wrinkles forehead skin horizontally

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what is the action of the occpitalis

draws scapl posteriorly

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true or false: the occpitalis and frontalis are not attached

false, attached via apeunorosis

what is the n=informal name for the orbiculariis oris

kissing muscle

what is the action of the orbicularis oris

closes and protrudes lips, compresses lips against teeth and shapes lips during speech

which is more lateral the zygomaticus major or minor

major

what is the function of zygomaticus major (lateral)

draws angle of mouth superiorly and laterally as in smiling or laughing

what is the function of zygomaticus minor (medial)

elevatets upper lip, exposing maxillary teeth

true or falseL the levator anguli oris is deep to zygomaticus muscles

rtue

what ist he action of levator anguli oris

pulls the angle of the mouth upwards

what is the action of levator labii superioris

elevates upper lip

what is the action of depssor labii inferiorid

depresses lower lip

what is the action of the depressor anguli oris

draws angle of mouth laterally and inferiorly as in opening mouth

what msucle is deep to risorius

buccinator

what is the action of the buccinator

presses cheeks against teeth and lips (whistiling, blowing, sucking), draws corner of mouth laterally and assissts in mastication by keeping food between teeth ( and not betwen teeth and cheeks)

what is the action of mentalis

elevates and protrudes lower lip and pulls the skin of the chin up (pouting)

what is the action of risorius

draws angle of mouth laterally, as in tenseness

whta is the action of platysma

draws outer part of lower lip inferiorly and psoteriorly (pouting), depresses mandible

what nerve innervates the muscles of fascial expression

cranial nerve 7

what is the action of the orbittcularis oculi

closes the eye

whata re the 2 divisions of the orbicularis oculi

orbital and palpebrae

what is the function of the currugator

draws eyebrow inferiorly and wirnkles skin of forehead vertically as in frowning

what is the action of the procerus

Wrinkles the skin between the eyebrows

the msucles that move the mandibule are corntrolled what what nerve

cranial neve 5 | trigenimal

what are the 4 muscles taht move the madnible

masseter temporalis medial and latteral pterygoid

what is the action of the masseter

Elevate mandible, as in closing mouth, and | retracts mandible

what is the action of the temporalis

Elevates and retracts mandible

what is the action of the medaial pterygoid

Elevates and protracts mandible and moves | mandible form side to side

what is the function of the lateral pterygoid

Protracts mandible, depresses mandible as in | opening mouth, and moves mandible from side to side

the muscels of the tongue are innervatied by waht

cranial nerve 12 (hypoglossal)

what are the 4 muscles of the tongue

Genioglossus • Styloglossus • Palatoglossus • Hyoglossus

what is the action of the genioglossus

Depresses tongue and thrusts it anteriorly

what is the action of the styloglossus

Elevates tongue and draws it posteriorly

what is the action of the palatoglossus

Elevates posterior portion of tongue and draws soft | palate down on tongue

what is the action of the hyoglossu

Depresses tongue and draws down its sides

what are the 4 muscles of the floor of the oral cavity

Digastric (CN V, VII) • Stylohyoid (CN VII) • Mylohyoid (CN V) • Geniohyoid (CN XII)

the disagtric is innervated by...

CN V, VII)

the stylohyoid is innenrvated by/.//

CN VII

the mylohyoid is innervated by...

CN V

what is the geniohyoid innnervaited by

CN XII

what is the action of the digastric

Elevates hyoid bone and depresses mandible, as in | opening the mouth

what is the actionn of the stylohyoid

Elevates hyoid bone and draws it posteriorly

what is the action of the mylohyoid

Elevates hyoid bone and floor of mouth and depresses | mandible

what is the action of the geniohyoid

Elevates hyoid bone, draws hyoid bone and tongue | anteriorly and depresses mandible

``` which is the deepest: digatstric stylohyoid mylohyoid geniohyoid ```

geniohyoid

what is the action of the sternocledimastoid muscle if it is acting billartery

Acting bilaterally: flex the cervical portion of vertebral column, extend head, and elevates sternum during forced inspiration

what is the action of the SCM is acting unialterally

• Acting unilaterally: laterally flex to the same side and rotate head to side opposite contracting muscle

what is another name for the extrinsic muscles of the larynx

infrohyoid

what are the 4 extrinsic muscles of the larynx

Omohyoid (C1-C3) • Sternohyoid (C1-C3) • Sternothyroid (C1-C3) • Thyrohyoid (CN XII, C1)

what is the omohyoid innervated by

C1-C3

what is the sternohyoid innervated by

c1-c3

what is the sternothyroid innervated by

c1-c3

what is the thyrohyoid innervated by

CN XII, C1

what is the action of the omohyoid and sternohyoid

Depresses hyoid bone

what si the action of the sternothyeoid

Depresses thyroid cartilage of larynx

what is the function of the the thyrohyoid

Elevates thyroid cartilage and depresses hyoid bone

what does general anesthesia result in

total relaxion of the genioglossus

what does anansteria to

causes tognue to fall postteriorly, obstruction airway to lungs

how is anestheis

avoided by manual jaw thrust or endotrachial intubation