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Muscle
Origin
Frontalis
Galea aponeurosis,
skin above the nose
anterior to the vertex and eyes
Occipitalis
Orbicularis oculi
Depressor anguli
Insertion
lateral 2/3 of superior galea aponeurosis,
nuchal line external over the occipital
occipital protuberance bone
orbital portion: nasal
process of frontal
bone
palpebral portion:
palpebral ligament
circumferentially
powerfully closes the
around orbit meeting
eye
in palpebral raphe
lacrimal portion:
lacrimal crest of
lacrimal bone
along the oblique line
of mandible
modiolus
Oris
Action
draws back the scalp
to raise the eyebrows
and wrinkle the brow
draws back the scalp
to raise the eyebrows
and wrinkle the brow
lateral aspect of
mental tubercle of the
mandible
alveolar border of
circumferentially
maxilla
around mouth
lowers the angle(s) of
the mouth (as in
frowning)
closes the lips
Orbicularis oris
lateral to midline of
mandible
blends with other
muscles
Superficial:
protrudes the lips
Superficial:
Masseter
angle of mandible
zygomatic process of
the maxilla
lateral surface of
mandibular ramus
inferior border of
zygomatic arch
Intermediate: ramus
of mandible
Intermediate: inner
surface of zygomatic Deep:
arch
superior ramus of
Deep: posterior aspect mandible
of inferior border of
zygomatic arch
coronoid process of
mandible
closes the lower jaw
(clenches the teeth)
may deviate mandible
to opposite side of
contraction
Blood: masseteric
artery
Nerve: masseteric
nerve
Temporalis
Temporal fossa
between inferior
temporal line and
infratemporal crest
Platysma
Inferior border of
Skin over lower neck mandible and skin
and upper lateral chest over lower face and
angle of mouth
Sternocleidomastoid
Anterior and superior
manubrium and
superior medial third
of clavicle
Lateral aspect of
mastoid process and
anterior half of
superior nuchal line
Origin
Clavicular headmedial half clavicle.
Sternocostal headlateral manubrium
and sternum, six
upper costal cartilages
and external oblique
aponeurosis
Upper eight ribs and
anterior intercostal
membranes from
midclavicular line.
Lower four
interdigitating with
external oblique
Insertion
Action
Lateral lip of bicipital
groove of humerus
and anterior lip of
deltoid tuberosity
Clavicular head:flexes
and adducts arm.
Sternal head: adducts
and medially rotates
arm . Accessory for
inspiration
Medial and anterior
aspect of coronoid
process of mandible
Elevates mandible and
posterior fibers retract
Depresses and
wrinkles skin of lower
face and mouth. Aids
forced depression of
mandible
Flexes and laterally
rotates cervical spine.
Protracts head when
acting together .
Extends neck when
neck already partially
extended
Muscles of Trunk
Muscle
Pectoralis major
Serratus anterior
Anterior: Lateral third
of clavicle
Deltoid
Middle: lateral
acromion
Posterior: spine of
scapula
Inner medial border
scapula. 1 and 2:
upper angle; 3 and 4: Laterally rotates and
length of costal
protracts scapula
surface ; 5-8: inferior
angle
Anterior: flexion,
horizontal adduction,
medial rotation of
humerus
Deltoid tuberosity of
humerus
Middle: abduction of
humerus to 90 degrees
Posterior: extension
horizontal abduction,
lateral rotation of
humerus
Elevates ribs if
scapula fixed,
protracts scapula
(assists serratus
anterior)
Pectoralis minor
3, 4, 5 ribs
Medial and upper
surface of coracoid
process of scapula
Trapezius
Medial third superior
nuchal line, ligament
nuchae, spinous
processes and
supraspinous
ligaments to T12
Upper fibers to lateral
third of posterior
laterally rotates,
border of clavicle;
elevates and retracts
lower to medial
scapula. If scapula is
acromion and superior fixed, extends and
lip of spine of scapula laterally flexes neck
to deltoid tubercle
Latissmus dorsi
Spine T7, spinous
processes and
supraspinous
ligaments of all lower
thoracic, lumbar and
sacral vertebrae,
lumbar fascia,
posterior third iliac
crest, last four ribs
(interdigitating with
external oblique
abdominis) and
inferior angle of
scapula
Extends, adducts and
Floor of bicipital
medially rotates arm.
groove of humerus
Costal attachment
after spiraling around helps with deep
teres major
inspiration and forced
expiration
Muscle
Diaphragm
External intercostals
Internal intercostals
Infraspinatus
Supraspinatus
Location
Action only
The diaphragm is the means
The lungs are located
by which the lungs inflate
anterior to the diaphragm.
and deflate.
Inferior border of ribs as Fix intercostal spaces during
far back as posterior
respiration. Aids forced
angles
inspiration by elevating ribs
Inferior border of ribs as Fix intercostal spaces during
far back as posterior
espiration. Aids forced
angles
inspiration by elevating ribs
Medial three quarters of Laterally rotates arm and
stabilizes shoulder joint
infraspinous fossa of
scapula and fibrous
intermuscular septa
Rotator cuff muscle
Medial three quarters of
Abducts arm and stabilizes
supraspinous fossa of
shoulder joint
scapula, upper surface of
spine (bipennate)
Subscapularis
Medial two thirds of
subscapular fossa
Rotator cuff muscle
Medially rotates arm and
stabilizes shoulder joint
Rotator cuff muscle
lateral rotation
Teres minor
Upper axillary border of
scapula
Extension of humerus
Rotator cuff muscle
Muscles of anterior abdominal wall
Muscle
Rectus abdominis
External oblique
Internal oblique
Transverses abdominis
Location and fibers only
Pubic crest and pubic symphysis
Anterior primary rami (T7-12)
Anterior angles of lower eight ribs
Anterior primary rami (T7-12)
Lumbar fascia, anterior two thirds
of iliac crest and lateral two thirds
of inguinal ligament Anterior
primary rami (T7-12) (conjoint
tendon ilioinguinal nerve (L1))
Costal margin, lumbar fascia,
anterior two thirds of iliac crest and
lateral half of inguinal ligament
Anterior primary rami (T7-12).
Conjoint tendon ilioinguinal