axial muscles

epicranius frontalus

epicranius occipitalus

orbicularis oculi

orbicularis oris

zygomaticus major

zygomaticus minor

platysma

temporalis

masseter

sternocleidomastoid

sternohyoid

iliocostalis

outermost from the spine

longissimus

middle oriented spinal muscle

spinalis

closest to the spine

diaphragm

external intercostals

just below ribs

internal intercostals

external oblique

internal oblique

under external oblique

rectus abdominus

transversus abdominus

under rectus

pectoralis major

pectoralis minor

serratus anterior

trapezius

levator scapulae

rhomboid major

rhomboid minor

latissimus dorsi

deltoid

subscapularis

supraspinatus

infraspinatus

teres major

teres minor

actin

thin

myosin

thick

epimysium

skeletal muscle is encased in a sheath called…

fascicles

epimysium is made up of bundles of…

fascicles

encased in perimysium

muscle fibers

encased in endomysium

microfibrils

muscle fibers are made up of…

myofiliments

actin and myosin

sarcomere

actin and myosin make up the

orbicularis

circular

rectus

parallel

convergent

skinny to fanned out

pennate

feathered

orbicularis oris

circular muscle example

rectus abdominus

rectus muscle example

pectoralis major

convergent muscle example

deltoid

multipennate example

moves scalp and eyebrows

epicranius frontal belly action

epicranial aponeurosis

epicranius frontal belly origin

subcutaneous layer of eyebrows and forehead

epicranius frontal belly insertion

retracts scalp

epicranius occipital belly action

nuchal line of occipital bone

epicranius occipital belly origin

epicranial aponeurosis

epicranius occipital belly insertion

closes eye

orbicularis oculi action

medial wall of orbit

orbicularis oculi origin

skin around eyelids

orbicularis oculi insertion

purses lips

orbicularis oris action

maxilla and mandible

orbicularis oris origin

encircling mouth

orbicularis oris insertion

elevates corner of mouth

zygomaticus major action

zygomatic bone

zygomaticus major origin

skin at corner of mouth

zygomaticus major insertion

elevates corner of mouth

zygomaticus minor action

zygomatic bone

zygomaticus minor origin

upper lip

zygomaticus minor insertion

tenses neck

platysma action

acromion of scapula

platysma origin

skin of cheek and chin

platysma insertion

elevates and retracts mandible

temporalis action

temporal lines

temporalis origin

coronoid process of mandible

temporalis insertion

elevates and protracts mandible

masseter action

zygomatic arch

masseter origin

ramus and angle of mandible

masseter insertion

flexes neck

sternocleidomastoid action

manubrium of sternum

sternocleidomastoid origin

mastoid process of occipital bone

sternocleidomastoid insertion

depresses hyoid

sternohyoid action

manubrium of sternum

sternohyoid origin

hyoid bone

sternohyoid insertion

laterally flexes spine

iliocostalis spinae action

posterior iliac crest

iliocostalis spinae origin

ribs

iliocostalis spinae insertion

rotates head

longissimus action

posterior iliac crest

longissimus origin

mastoid process of temporal bone

longissimus insertion

extends vertebral column

spinalis action

spinous process of lumbar vertebrae

spinalis origin

spinous axis of axis and thoracic vertebrae

spinalis insertion

contracts/flattens during inspiration

diaphragm action

inferior internal surface of lower ribs

diaphragm origin

elevates ribs during aspiration

external intercostal action

inferior border of superior ribs

external intercostal origin

superior border of inferior rib

external intercostal insertion