Appendicular Muscles- Practical 3

deltoid origin

clavicle, acromion, scapular spine

deltoid insertion

deltoid tuberosity of humerous

deltoid action

abducts arm; flexes, extends, medially and laterally rotates humorous

biceps brachii origin

superior region of glenoid cavity, coracoid process of scapula

biceps brachii insertion

radial tuberosity

biceps brachii action

flexes arm and forearm, supinates forearm

brachioradialis origin

lateral supracondylar ridge of humerous

brachioradialis insertion

near styloid process of lateral radis

brachioradialis action

flexes forearm

teres major origin

inferior angle of scapula

teres major insertion

crest of lesser tubercle of humerous

teres major action

extends and medially rotates humerous

triceps brachii origin

infraglenoid tubercle of scapula, lateral and posterior surface of humerous

triceps brachii insertion

olecranon, tuberosity of ulna

triceps brachii action

extends and adducts arm, extends forearm

supraspinatus origin

supraspinatus fossa

supraspinatus insertion

greater tubercle of humerous

supraspinatus action

abducts arm, stabilize shoulder joint

infraspinatus origin

infraspinatus fossa

infraspinatus insertion

greater tubercle of humerousi

infraspinatus action

laterally rotates arm, stabilize shoulder joint

teres minor origin

lateral border of scapula

teres minor insertion

greater tubercle of humerous

teres minor action

laterally rotates and adducts humerous, stabilize shoulder joint

subscapularis origin

subscapular fossa

subscapularis insertion

lesser tubercle of humerous

subscapularis action

medially rotates arm, stabilize shoulder joint

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, iliac fossa, sacrum

iliacus insertion

lesser trochanter of femur

iliacus action

flex thigh and lumbar vertebrae

psoas major origin

transverse process of T12, L1-5

psoas major insertion

lesser trochanter of femurp

psoas major action

flex thigh and lumbar vertebrae

rectus femoris origin

anterior inferior iliac spine, acetabulum margin

rectus femoris insertion

patella, tibial tuberosity, lateral and medial condyles of tibia

rectus femoris action

flexes thigh, extends leg

vastus intermedius origin

proximal, anterior femur

vastus intermedius insertion

patella, tibial tuberosity, lateral and medial condyles of tibia

vastus intermedius action

extends leg

vastus lateralis origin

greater trochanter of femur, linea aspera of femur

vastus lateralis insertion

patella, tibial tuberosity, lateral and medial condyles of tibia

vastus lateralis action

extends leg

vastus medialis origin

linea aspera, medial side

vastus medialis insertion

patella, tibial tuberosity, lateral and medial condyles of tibia

vastus medialis action

extends leg

gluteus maximus origin

outer iliac surface, iliac crest, sacrum, coccyx

gluteus maximus insertion

gluteal tuberosity of femur, iliotibial tract of fasciae latae

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

brachialis action

flexes forearm

extensor digitorum action

extends phalanges, extends hand

palmaris longus action

anchors skin and fascia of palmar region

flexor carpi ulnaris action

flexes and adducts wrist

flexor carpi radialis action

flexes and abducts wrist

pronator teres action

pronates and flexes forearm

extensor carpi radialis longus action

extends and abducts wrist

extensor carpi radialis brevis

extends and abducts wrist

piriformus action

laterally rotates extended thigh, abducts flexed thigh

sartorius action

flexes and laterally rotates thigh, flexes knee

extensor digitorum longus action

extends toes, dorsiflexes foot

gracilis action

flexes and medially rotates leg

soleus action

plantar flexes foot

iliotibial tract action

hip and knee stabilization in extension and partial flexion

calcaneal tract action

plantar flexes foot