Muscular System Practical

cranial aponeurosis

Frontalis (origin)

skin of eyebrows

Frontalis (insertion)

raise eyebrows

Frontalis (action)

frontal bone

Orbicularis oculi (origin)

tissue around eyes

Orbicularis oculi (insertion)

blink/close eyes

Orbicularis oculi (action)

maxilla

Orbicularis oris (origin)

tissue around mouth

Orbicularis oris (insertion)

close mouth

Orbicularis oris (action)

mandible (molars)

Buccinator (origin)

orbicularis oris

Buccinator (insertion)

sucking

Buccinator (action)

zygomatic bone

Zygomaticus (origin)

corner of lips

Zygomaticus (insertion)

smiling

Zygomaticus (action)

close jaw

Masseter and temporalis (origin - temporal bone, insertion - mandible)

CT of upper chest

Platysma (origin)

tissue around mouth

Platysma (insertion)

frowning

Platysma (action)

sternum and clavicle

Sternocleidomastoid (origin)

mastoid process

Sternocleidomastoid (insertion)

rotate neck

Sternocleidomastoid (action)

ribs #1-6

Pectoralis major (origin)

proximal humerus

Pectoralis major (insertion)

adducts and flexes humerus

Pectoralis major (action)

rib boarders

Intercostals (origin and insertion)

breathing mechanisms

Intercostals (action)

pubis

Rectus abdominus (origin)

ribs #5-7

Rectus abdominus (insertion)

flex vertebral column (bend over)

Rectus abdominus (action)

flexing sides of the body

External and internal oblique (action)

lower 8 ribs

External oblique (origin)

iliac crest

External oblique (insertion)

iliac crest

Internal oblique (origin)

ribs #9-12

Internal oblique (insertion)

iliac crest

Transverse abdominus (origin)

pubis

Transverse abdominus (insertion)

twist/turn side to side

Transverse abdominus (action)

occipital bone

Trapezius (origin)

clavicle

Trapezius (insertion)

extends neck

Trapezius (action)

lower spine

Latissimus dorsi (origin)

proximal humerus

Latissimus dorsi (insertion)

extend and adduct humerus

Latissimus dorsi (action)

vertebrae

Erector spinae (origin)

ribs

Erector spinae (insertion)

arch/extend back, posture

Erector spinae (action)

scapular spine

Deltoid (origin)

deltoid tuberosity

Deltoid (insertion)

abducts humerus

Deltoid (action)

scapula (corocoid process)

Biceps brachii (origin)

radial tuberosity

Biceps brachii (insertion)

distal humerus

Brachialis and Brachioradialis
(origin)

proximal ulna

Brachialis (insertion)

styloid process of radius

Brachioradialis (insertion)

flex elbow

Biceps brachii, brachialis, and brachioradialis

proximal humerus

Triceps brachii (origin)

olecranon process

Triceps brachii (insertion)

extends elbow

Triceps brachii (action)

medial epicondyle of humerus)

Pronator teres (origin)

pronates arm

Pronator teres (action)

lateral epicondyle of humerus

Supinator (origin)

supinates arm

Supinator (action)

radius

Pronator teres and supinator (insertion)

metacarpals #2 and 3

Flexor carpi radialus (insertion)

metacarpal #5

Flexor carpi ulnaris (insertion)

middle phalanges #2-5

Flexor digitorum (insertion)

distal humerus

Flexor carpi radialis, ulnaris, and digitorum (origin)

flex wrist

Flexor carpi radialis, ulnaris, and digitorum (action)

humerus

Extensor carpi radialis (origin)

metacarpals

Extensor carpi radialis (insertion)

lateral epicondyle of humerus

Extensor carpi ulnaris (origin)

metacarpal #5

Extensor carpi ulnaris (insertion)

distal humerus

Extensor digitorum (origin)

distal phalanges #2-5

Extensor digitorum (insertion)

extend wrist

Extensor carpi radialis, ulnaris, and digitorum (action)

sacrum

Gluteus maximum (origin)

gluteal tuberosity

Gluteus maximum (insertion)

extends hip backwards

Gluteus maximum (action)

ilium

Gluteus medius (origin)

proximal femur

Gluteus medius (insertion)

abducts thigh

Gluteus medius (action)

lesser trochanter of femur

Iliopsoas (insertion)

proximal tibia

Sartorius (insertion)

iliac crest

Tensor faciae latae (origin)

iliotibial tract

Tensor faciae latae (insertion)

ilium

Iliopsoas and sartorius (origin)

flex hip forwards

Tensor faciae latae, iliopsoas, and sartorius (action)

medial tibia

Gracilis (insertion)

linea aspera (femur)

Adductor longus (insertion)

inferior pubic ramus

Gracilis and adductor longus (origin)

adduct thigh

Gracilis and adductor longus (action)

quadriceps

Vastus lateralis, intermedius, medialis, and rectus femoris

tibial tuberosity via patellar tendon

Quadriceps (insertion)

extend knee

Quadriceps (action)

femur

Vastus lateralis, intermedius, and medialis (origin)

pelvis

Rectus femoris (origin)

hamstrings

Biceps femoris, semitendinosus, and semimembranous

ischial tuberosity

Hamstrings (origin)

flex knee

Hamstrings (action)