axial muscles

PCC anatomy and physiology 1

what is #1

sternocleidomastoid

what is #2

levator scaplulae

what is #3

trapezius

what is #4

latissimus doris

what is #5

rhomboid major

what is #6

rhomboid minor

what is #7

erector spinae

what is #8

deltoid

what is #1

external intercostal

what is #2

internal intercostal

what is #3

pectoralis major

what is #5

rectus abdominis

what is #6

external abdominal oblique

what is #7

internal abdominal oblique

what is #8

transversus abdominis

what is #9

sternocleidomastoid

what is #10

pectoralis minor

what is #11

trapezius

what is #12

Serratus anterior

what #1

occipitofrontalis (frontal belly)

what is #2

orbicularis oculi

what is #3

buccinator

what is #4

masseter

what is #5

risorius

what is #6

zygomaticus minor

what is #7

zygomaticus major

what is #8

orbicularis oris

what is #9

sternocleidomastoid

origin

the attachment site that doesn’t move during contraction

insertion

site where bone and muscle are attached, and move during contraction

aponeurosis

thin sheet of connective tissue that helps connect muscle to bone

what is #1

perimysium

what is #2

fascicle

what is #3

endomysium

what is #4

epimysium

what is #5

tendon

occipitofrontalis (frontal belly) origin, insertion, and action

origin-aponeurosis

insertion-skin of eyebrows

action-raises eyebrows

occipitofrontalis (occipital belly) origin, insertion, and action

origin- occipital bone

insertion- aponeurosis

action- pulls scalp posteriorly

orbicularis oculi origin, insertion, and action

origin- frontal bone, maxilla

insertion- skin of eyelid

action- closes eyelids

temporalis origin, insertion, action

origin- temporal bone

insertion- coronoid process of the mandible

action- elevates and retracts mandible

masseter origin, insertion, action

origin- zygomatic arch

insertion- mandibular ramus

action- elevates mandible

buccinator origin, insertion, action

origin- alveolar process of the lateral mandible and maxilla

insertion- orbicularis oris

action- compresses cheek

orbicularis oris origin, insertion, and action

origin- modiolus (skin and muscles at corner) of mouth

insertion- skin of mouth

action- closes lip

zygomaticus major and minor origin, insertion, action

origin- zygomatic bone

insertion- skin/muscle at corners of mouth

action- elevates corners of mouth

risorius origin, insertion, action

origin- zygomatic arch

insertion- modiolus of mouth

action- draws corners of lips laterally

sternocleidomastoid origin, insertion, action

origin- manubrium, clavicle

insertion- mastoid process of the temporal bone

action- flexes neck, head rotation

scalenes origin, insertion, action

origin- transverse process of the cervical vertebrae

insertion- ribs 1 & 2

action- flex, rotate neck; elevate ribs

levator scapulae origin, insertion, action

origin- transverse process of C1-C4

insertion- medial border of scapula

action- elevates and adducts scapula

trapezius origin, insertion, actoin

origin- external occipital protuberance, spinous processes of C7-T12

insertion- acromion, scapular spine

action- extend neck; raise, rotate, adduct scapula

latissimus dorsi o, i ,a

origin- spinous process of T6-L5, ribs 8-12, iliac crest

insertion- intertubercular groove of humerus

action- extend, adduct and medially rotate arm

rhomboid major o, i, a

origin- spinous process of T3-T5

insertion- medial border of scapula

action retract and stabilize scapula

rhomboid minor o, i, a

origin- spinous process of c7-t1

insertion- medial border of scapula

action retract and stabilize scapula

serratus anterior

origin- lateral aspect of ribs

insertion- medial border of scapula

action- scapula forward and lateral rotation

erector spinae o, i, a

origin, T and L vertebrae, ribs 3-12

insertion- occipital bone, thoracic and lumbar vertebrae, mastoid process

action- extend neck and vertebrae column

diaphragm o,i,a

origin- xiphoid process, ribs/costal cartilage

insertion- diaphragm tendon

action- mover of inspiration

external intercostals i,o,a

origin- inferior border of superior rib

insertion- superior border of inferior rib

action- elevate rib cage, inspiration

internal intercostal o,i a

origin, superior border of inferior rib

insertion- inferior border of superior rib

action- depress rib cage, expiration

pectoralis major o,i,a

origin- clavicle, sternum, ribs 1-7

insertion- intertubercular groove of humerus

action- flex, medial rotation, and adduction of arm

pectoralis minor o,i,a

origin- ribs 3-5

insertion- coracoid process of scapula

actoin- elevates ribs and scapula forward

rectus abdominis o,i,a

origin- pubic region, pubic symphysis

insertion- xiphoid process, rib cartilages 5-7

action- flex and rotate vertebral column

external oblique o,i,a

origin- anterior ribs 5-12

insertion- pubic crest, and tubercle, iliac crest

action- trunk rotation, lateral flexion, depress ribs

internal oblique oia

origin-iliac crest

insertion- ribs 10-12, pubic crest

action- trunk rotation, lateral flexion, depress ribs

transversus abdominis o,i,a

origin- iliac crest, cartilage of ribs 6-12

insertion- pubic crest, linea alba

action- compress abdomen