A&P 1 Lab exam 2

trapezuis

Sternocleidomastoid

orbicularis oculi

orbicularis oris

deltoid

pectoris major

pectoralis minor

latissimus dorsi

rectus abdominis

external oblique

gluteus maximus

Infraspinatus

teres minor

teres major

supraspinatus

gluteus medius

sternocleidomastoid origin

manubrium, clavicle

sternocleidomastoid insertion

mastoid process of temporal bone

sternocleidomastoid action

head flexion, rotation, flexion side to side

trapezius origin

occipital bone, C7 spinous process

trapezius insertion

acromion process, spine of scapula

trapezius action

shrugging muscles, elevate and retract scapula

orbicularis oculi origin

maxilla, frontal bone

orbicularis oculi insertion

tissue of eyelid

orbicularis oculi action

close eyes

orbicularis oris origin

maxilla, mandible

orbicularis oris insertion

mandible

orbicularis oris action

closes mouth; purses lips

masseter

masseter origin

zygomatic arch, maxilla

masseter insertion

mandible

masseter action

closes jaw; elevates mandible

temporalis

temporalis origin

temporal bone

temporalis insertion

mandible

temporalis action

closes jaw

deltoid origin

acromion process, spine of scapula

deltoid insertion

deltoid tuberosity

deltoid action

shoulder abduction, extension, flexion

pectoralis major origin

clavicle, sternum

pectoralis major insertion

greater tubercle of humerus, intertubuercular sulcus

pectoralis major action

shoulder flexion, adduction

pectoralis minor origin

anterior surface ribs 3-5

pectoralis minor insertion

coracoid process

pectoralis minor action

ribs fixed: moves scapula forward and downward, scapula fixes: elevates rib cage

infraspinatus origin

infraspinous fossa of scapula

infraspinatus insertion

greater tubercle of humerus

infraspinatus action

stabilize shoulder -- holds head of humerus in glenoid fossa, lateral rotation

teres minor origin

lateral border scapula

teres minor insertion

greater tubercle of humerus

teres minor action

adducts and stabilizes shoulder, lateral rotation

teres major origin

inferior angle of scapula

teres major insertion

lesser tubercle of humerus

teres major action

medial rotation of humerus

supraspinatus origin

supraspinous fossa of scapula

supraspinatus insertion

greater tubercle of humerus

supraspinatus action

abduction, stabilize shoulder

external intercostals

external intercostals origin

inferior border of rib above

external intercostals insertion

superior border of rib below

external intercostals action

raises ribs to expand thorax

latissimus dorsi origin

vertebrae, iliac crest, ribs

latissimus dorsi insertion

humerus

latissimus dorsi action

extend arm, adduct arm, medially rotate, draw shoulder back and down

levator scapulae

levator scapulae origin

vertebrae C1-C4

levator scapulae insertion

scapula

levator scapulae action

elevates scapula, adducts scapula

rhomboid major and minor

rhomboid major and minor origin

vertebrae C7, T1-T5

rhomboid major and minor insertion

scapula

rhomboid major and minor action

moves scapula medially

serratus anterior

serratus anterior origin

ribs 1-8

serratus anterior insertion

anterior surface and vertebral border of scapula

serratus anterior action

protraction of scapula

rectus abdominis origin

pubic crest and symphysis

rectus abdominis insertion

xiphoid process of sternum, costal cartilage of ribs 5-7

rectus abdominis action

trunk flexion

external oblique origin

anterior surface of last 8 ribs

external oblique insertion

linea alba, pubis, iliac crest

external oblique action

trunk flexion, rotation, and lateral flexion

internal oblique

internal oblique origin

pelvis

internal oblique insertion

linea alba, pubis, costal cartilage of last 3 ribs

internal oblique action

trunk flexion, rotation, lateral flexion

transversus abdominis

transversus abdominis origin

pelvis, ribs

transversus abdominis insertion

linea alba, pubis

transversus abdominis action

compresses abdomen

gluteus medius origin

lateral surface of ilium

gluteus medius insertion

greater trochanter of femur

gluteus medius action

abducts and medially rotates thigh

gluteus maximus origin

ilium, sacrum, coccyx

gluteus maximus insertion

gluteal tuberosity of femur

gluteus maximus action

hip extensor

quadratus lumborum

quadratus lumborum origin

iliac crest

quadratus lumborum insertion

transverse process L1-L4

quadratus lumborum action

flexes vertebral column laterally