Facial Anat

Front 1

epicranius m

Back 1

has 2 bellies-frontal and occipital
facial n.
produces wrinkles in forehead and gives facial expression of astonishment

Front 2

orbicularis oculi m.

Back 2

produces folds in lateral angle of eye, expression of worry and concern

facial n.

Front 3

corrugator supercilli

Back 3

pulls skin and eyebrow down and medially
makes vertical folds
protects against light
pathetic pain muscle
thinker's brow expression

n. facial n.

Front 4

orbicularis oris m.

Back 4

it's contraction closes mouth
strong contraction gives sucking shape
expression of reserve
facial n.

Front 5

buccinator m.

Back 5

enables air to be blown out of mouth
pulls angle of mouth laterally
keeps mucous membrane of the cheek free of folds

contraction gives expression of satisfaction

facial n.

Front 6

zygomaticus major

Back 6

lifts corner of mouth upward, expression of laughter or pleasure facial n.

Front 7

risorius

Back 7

laughing muscles
together w/ zygomatic major it produces the nasolabial folds it's contraction gives expresion of action

facial n.

Front 8

lavator anguli oris

Back 8

it lifts angle of mouth, expressio of confidence facial n

Front 9

depressor anguli oris

Back 9

pulls angle ofmouth down and shows sadness

facial n.

Front 10

depressor labii inferiors

Back 10

pulls lower lid down, giving expression of perseverance

facial

Front 11

mentalis

Back 11

chin-lip furrow, doubt and indecesion

facial n.

Front 12

muscles of mastication

Back 12

masseter, temporalis, lateral and medial pterygoid

mandibular n.
develop from 1st brachial arch

Front 13

masseter m

Back 13

powerfully closes jaw by elevating mandible

masseteric n--cn V/3

Front 14

temporalis m

Back 14

strongest elevator of lower jaw

deep temporal n--cn v/3

Front 15

lateral pterygoid

Back 15

mandibular movements-guiding m.

lateral pterygoid n-- cnv/3

Front 16

medial pterygoid

Back 16

elevates mandible and pushes forward
rotational movement

medial pterygoid n.-- cnv/3

Front 17

anastomoses

Back 17

allows direct connection to cavernous sinus through whcih infections (from a furuncle on lip may get into skull)

Front 18

hyoid bone

Back 18

in neck, but may be included with the bony skeleton of skull

Front 19

omohyoid m.

Back 19

facial tensor, dilates internal jugular vein lying beneath it, aids in returns blood to heart

opens mouth and helps in lateral flexion of head

cervical ansa

Front 20

infrahyoid m.

Back 20

sternohyoid, omohyoid, sternothryoid, thyrohyoid m

c1 before giving to cervical ansa

work together to approx. tyroid cartilage to hyoid bone
when mouth is open stabilizes laryngeal cartilages and hyoid bone

Front 21

digastric m

Back 21

raising hyoid and stablizing it in speaking and swallowing, depressing the mandible

ant belly: trigeminal n, post belly: vii, facial n.

Front 22

stylohyoid m

Back 22

elevates and retracts hyoid bone, elonates floor of mouth
vii, facial n.

Front 23

myelohyoid m

Back 23

elevates hyoid and floor of mouth and tongue in swallowing and pseaking
v/3

Front 24

geniohyoid m

Back 24

pulls hyoid anterosuperiorly shorterns floor of mouth and widens pharynx

c1

Front 25

rectus capitis

Back 25

helps to flex the head

cervical plex

Front 26

botulinium n

Back 26

botox

interferes with neuromuscular junction contraction

Front 27

cervical plexus

Back 27

c1-c4

Front 28

cervical ansa

Back 28

part of cervical plexus, c1-c3

Front 29

phrenic n.

Back 29

part of cervical plexus c3-c5

major n. that innervates thoracic diaphragm

Front 30

opthalmic n.

Back 30

branch of CNV

is sensory n.

Front 31

maxillary n.

Back 31

branch of CNV (trigeminal n. )

innervates infororbital n.

Front 32

mandibular n.

Back 32

branch of CNV (trigeminal n. )
contains most motor fibers
asses through foramen ovale

Front 33

blood supply of face

Back 33

mostly by ext. carotid and partly by int. carotid

Front 34

sternocleidomastoid m

Back 34

unilateral contraction turns head to opp. side and bends it ipsilaterally
bilateral contraction: lifts head
alsof unctions in respiration

accessory n and c2-c3

Front 35

scalene muscles

Back 35

anterior, medius, posterior

minimus is present in 30%

most important m.s for quiet inspiration, lift first 2 pairs of ribs (support part of thorax)
unilateral contraction tilts cervical column to one side.

Front 36

scalene opening

Back 36

brachial plexus and subclavian artery pass through

Front 37

occipital triangle

Back 37

omotrapezoid

contains cervical plexus

accessory N comes from behind sternocleidomastoid

divides supraclavicular region to carefree and careful zone-sup. cerv artery and anterior scalene m.

Front 38

scalene gap

Back 38

formed btw scalene anterior and middle and 1st rib which run the brachial plexus and subclavian a.

Front 39

thryoid gland

Back 39

body's largest endocrine gland

produces thyroxin which controls rate of metabolism of budy and calcitonin controlling Ca++ metabolism

Front 40

parathyroid glands

Back 40

4

produce parahormon, controll metabolism of P and ca