Muscle AIO

Occipitalis Insertion

galea aponeurotica

Occipitalis Action

Retracts scalp

Frontalis Insertion

Eyebrow Skin

Frontalis Action

Elevates eyebrows

Occipitalis Origin

Occipital Bone

Orbicularis Oculi Origin

Frontal bone

Orbicularis Oculi Insertion

Eyelid Tissue

Orbicularis Oculi Action

blinking

Levator Labii Superioris Origin

zygomatic bone

Levator Labii Superioris insertion

upper lip

Levator Labii Superioris action

opens lips

Levator Anguli Oris Action

elevates mouth angle

Orbicularis Oris Origin

maxilla

Orbicularis Oris Insertion

mouth angles

Orbicularis Oris Action

closes mouth

Zygomaticus Major and minor Origin

zygomatic bone

Zygomaticus Major and minor Insertion

mouth corner

Zygomaticus Major and minor action

smiling

Risorius Origin

Masseter fascia

Risorius insertion

mouth corners

Risorius Action

smiling

Depressor Labii Inferioris Origin

mandible body

Depressor Labii Inferioris Insertion

lower lip

Depressor Labii Inferioris Action

depresses lip

Depressor Anguli Oris Origin

mandible body

Depressor Anguli Oris Insertion

mouth corners

Depressor Anguli Oris action

frowning

Mentalis Origin

Mandible

Mentalis insertion

chin skin

Mentalis action

wrinkles chin

Platysma origin

chest fascia

Platysma insertion

mandible

Platysma action

depresses mandible

Masseter Origin

zygomatic arch

masseter insertion

ramus of mandible

Masseter action

closes jaw

Temporalis Origin

Temporal fossa

Temporalis insertion

mandible coronoid process

Temporalis action

closes jaw

Buccinator Origin

mandible

Buccinator Insertion

Orbicularis oris

Buccinator Action

draws mouth corners

Medial Pterygoid origin

sphenoid

Medial pterygoid insertion

mandible angle

Medial and lateral pterygoid action

chewing

Lateral Pterygoid origin

sphenoid greater wing

Lateral pterygoid insertion

mandibular condyle

galea aponeurotica action

tendon

Suprahyoid Muscles

digastric, stylohyoid, mylohyoid

Infrahyoid Muscles

Sternohyoid, sternothyroid, omohyoid, thyrohyoid

Digastric origin

mandible

Suprahyoid insertion and action

hyoid, elevates hyoid

Stylohyoid origin

styloid process

Mylohyoid origin

mandible

Infrahyoid action

depresses hyoid

Sternyohyoid origin

manubrium

Sternohyoid insertion

hyoid

Sternothyroid origin

manubrium

Sternothyroid insertion

larynx (thyroid cartilage)

Omohyoid origin

Scapula (superior border)

Omohyoid and thyrohyoid insertion

hyoid

Thyrohyoid origin

larynx (thyroid cartilage)

Posterior Neck Muscles

sternocleidomastoid, splenius capitis, levator scapulae, scalenes, semispinalis capitis

Sternocleidomastoid origin

manubrium

Sternocleidomastoid insertion

mastoid process

Sternocleidomastoid and Scalenes action

flexes neck

Scalenes origin

cervical vertebrea transverse process

Scalenes insertion

ribs 1-2

Levator Scapulae origin

C1-C4 transverse process

Levator Scapulae Insertion

Scapula medial border

Levator Scapulae action

elevates scapula

Splenius capitis origin

spinous processes of C7-T6

Splenius capitis insertion

mastoid process

Splenius capitis and Semispinalis Capitis action

Extends head

Semispinalis Capitis Origin

C7- T 12 transverse process

Semispinalis Capitis Insertion

occipital bone

Pectoralis Major Origin

clavicle

Pectoralis Major insertion

humerus (intertubercular sulcus)

Pectoralis Major Action

elevates chest

Pectoralis minor origin

Ribs 3-5

Pectoralis minor insertion

scapula coracoid process

Pectoralis minor action

elevates ribs

Deltoid origin

clavicle

Deltoid insertion

Humerus deltoid tuberosity

Deltoid action

extends humerus

Serratus Anterior Origin

Ribs 1-8

Serratus Anterior insertion

scapula

Serratus Anterior action

elevates humerus

External Intercostals origin

inferior border of rib above

External Intercostals insertion

superior border of rib below

Internal intercostals origin

superior border of rib below

internal intercostals insertion

inferior border of rib above

External and internal intercostals actions

external: elevates rib cage

internal: depressed rib cage

Diaphragm origin

lumbar vertabrae

Diaphragm insertion

central tendon

Diaphragm action

Inspiration prime mover

Contracts during inspiration

Expands during expiration

Trapezius origin

occipital bone

Trapezius insertion

scapule

Trapezius action

shrugging

Latissimus Dorsi origin

iliac crest