Practical 3 - All muscles

masseter origin

zygomatic arch

masseter insertion

angle and ramus of mandible

masseter action

elevates mandible

temporalis origin

temporal fossa

temporalis insertion

ramus of mandible, coronoid process of mandible

temporalis action

elevates mandible (t)

sternocleidomastoid origin

sternum and clavicle

sternocleidomastoid insertion

mastoid process of the temporal bone

sternocleidomastoid action

rotates and flexes head

trapezius origin

posterior occipital bone

trapezius insertion

clavicle

trapezius action

rotates and adducts scapula

latissimus dorsi origin

crest of ilium

latissimus dorsi insertion

intertubercular sulcus of humerus

latissimus dorsi action

extends, adducts, and medially rotates humerus

pectoralis major origin

costal cartilages of ribs 1-7

pectoralis major insertion

crest of greater tubercle of humerus

pectoralis major action

flexes, adducts and medially rotates humerus

pectoralis minor origin

costal cartilages of ribs 3-5

pectoralis minor insertion

coracoid process of scapula

pectoralis minor action

depresses glenoid cavity

rectus abdominis origin

pubic symphysis

rectus abdominis insertion

xiphoid process of the sternum

rectus abdominis action

compresses abdominal wall

zygomaticus major origin 

zygomatic bone

zygomaticus major insertion

superolateral angle of the mouth / muscles of the upper lip

zygomaticus major action

elevates corners of the mouth (smiling and laughing)

deltoid origin

clavicle, acromion, spine of scapula

deltoid insertion

deltoid tuberosity of the humerus

deltoid action

abducts arm, flexes, extends, medially and laterally rotates humerus

biceps brachii long head origin

superior margin of glenoid cavity

biceps brachii short head origin

coracoid process of scapula

biceps brachii insertion

radial tuberosity

biceps brachii action

flexes arm, flexes forearm, supinates forearm

brachioradialis origin

lateral supracondylar ridge of humerus

brachioradialis insertion

near styloid process of lateral radius

brachioradialis action

flexes forearm

teres major origin

inferior angle of scapula

teres major insertion

crest of lesser tubercle of humerus

teres major action

extends and medially rotates humerus

triceps brachii origin

infraglenoid tubercle of scapula, lateral and posterior surface of humerus

triceps brachii insertion

olecranon process of ulna

triceps brachii action

extends and adducts arm, extends forearm

supraspinatus origin

supraspinous fossa

supraspinatus insertion

greater tubercle of humerus

supraspinatus action

rotates humerus medially

infraspinatus origin

infraspinous fossa

infraspinatus insertion

greater tubercle of humerus

infraspinatus action

prevents humeral head from sliding forward

teres minor origin

lateral border of scapula

teres minor insertion

greater tubercle of humerus

teres minor action

laterally rotates humerus

subscapularis origin

subscapular fossa

subscapularis insertion

lesser tubercle of humerus

subscapularis action

deltoid abduction

biceps femoris origin

ischial tuberosity, linea aspera

biceps femoris insertion

head of fibula

biceps femoris action

extends thigh, flexes knee

semitendinosus origin

ischial tuberosity

semitendinosus insertion

proximal, medial tibia

semitendinosus action

extends thigh, flexes knee

semimembranosus origin

ischial tuberosity

semimembranosus insertion

medial condyle of tibia

semimembranosus action

extends thigh, flexes knee

Iliacus origin

iliac crest

iliacus insertion

lesser trochanter of femur

iliacus action

flexes thigh and lumbar vertebrae

psoas major origin

sacrum, iliac crest

psoas major insertion

lesser trochanter of femur (PM)

psoas major action

flexes thigh and lumbar vertebrae

rectus femoris origin

anterior inferior iliac spine

rectus femoris insertion

patella, tibial tuberosity

rectus femoris action

flexes thigh

vastus lateralis origin

greater trochanter of femur, linea aspera of femus

vastus lateralis insertion

patella, tibial tuberosity (VL)

vastus lateralis action

extends leg (VL)

vastus medialis origin

linea aspera, medial side

vastus medialis insertion

patella, tibial tuberosity (VM)

vastus medialis action

extends leg (VM)

vastus intermedius origin

proximal, anterior femur

vastus intermedius insertion

patella, tibial tuberosity (VIM)

vastus intermedius action

extends leg (VIM)

gluteus maximus origin

outer iliac surface, iliac crest

gluteus maximus insertion

gluteal tuberosity of femur

gluteus maximus action

extends and abducts thigh

gastrocnemius origin

condyles of femur

gastrocnemius insertion

calcaneus

gastrocnemius action

flexes leg, plantar flexes foot

tibialis anterior origin

lateral condyle and proximal tibia

tibialis anterior insertion

first metatarsal and medial cuneiform

tibialis anterior action

dorsiflexes and inverts foot

buccinator action

compresses cheek

frontal belly of occipitofrontalis action

raises eyebrows

occipital belly of occipitofrontalis action

retracts scalp

mentalis action

protrudes lower lip

orbicular oris action

closes lips

orbicular oculi action

closes eyes

zygomaticus minor action

elevates corners of mouth (ZMinor)

diaphragm action

inspiration

external oblique action

compresses abdominal wall, laterally rotates waist (EO)