A&P Upper and Lower Extremities

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Deltoid Origin

Clavicle and spine of scapula

Deltoid insertion

Proximal humerus (deltoid tubercle)

Deltoid function

Abducts shoulder

biceps brachii origin

corocoid process and supraglenoid tubercle of scapula

biceps brachii insertion

radial tuberosity

biceps brachii function

flexes elbow, flexes shoulder slightly

brachialis origin

anterior humerus (O)

brachialis insertion

proximal ulna

brachialis function

flexion of elbow, synergist to biceps

Brachioradialis origin

anterior humerus

Brachioradialis insertion

distal radius

Brachioradialis function

Assists flexion of elbow, especially with thumb up

triceps brachii origin

infraglenoid tubercle, and proximal, posterior humerus

triceps brachii insertion

olecranon process

triceps brachii function

extends elbow, slightly extends shoulder

gluteus maximus origin

posterior ilium, sacrum and coccyx

gluteus maximus insertion

proximal femur

gluteus maximus

extends hip

gluteus medius origin

posterior ilium

gluteus medius insertion

proximal femur

gluteus medius function

abducts hip

iliopsoas origin

anterior lumbar vertebrae and ilium

iliopsoas insertion

lesser trochanter of femur

iliopsoas function

flexes hip

adductor group origin

pubis

adductor group insertion

medial femur

adductor group function

adducts hip

hamstring group origin

ischium and posterior femur

hamstring group insertion

proximal, posterior tibia and fibula

hamstring group function

flexes knee

sartorius origin

anterior iliac crest

sartorius insertion

medial tibia

sartorius function

weak hip flexion and external rotation of hip (Tailor's muscle)

quadriceps group origin

Ilium and anterior femur

quadriceps group insertion

tibial tuberosity

quadriceps group function

extends knee

tibialis anterior origin

anterior tibia

tibialis anterior insertion

base of 1st metatarsal

tibialis anterior function

dorsiflexes and inverts ankle

extensor digitorum longus origin

lateral tibial condyle and proximal fibula

extensor digitorum longus insertion

phalanges of toes 2-5

extensor digitorum longus function

extends toes and dorsiflexes foot

fibularis group origin

lateral fibula

fibularis group insertion

base of 5th metatarsal and lateral side of base of 1st metatarsal

fibularis group function

eversion, assists plantar flexion

gastrocnemius origin

posterior, distal femur

gastrocnemius insertion

calcaneus

gastrocnemius function

plantar flexion of ankle

soleus origin

posterior surface of proximal tibia and fibula

soleus insertion

calcaneus

soleus function

plantar flexion of ankle

Deltoid

biceps brachii

brachialis

brachioradialis

triceps brachii

gluteus maximus

gluteus medius

iliopsoas

adductor group

hamstring group

sartorius

quadriceps group

tibialis anterior

extensor digitorum longus

fibularis group

gastrocnemius

soleus