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orbicularis oculi: action
close eye
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orbicularis oris: action
close and purse lips
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masseter: origin
zygomatic arch
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masseter: insertion
angle and ramus of mandible
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masseter: action
elevate mandible and close jaw
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temporalis: action
elevate mandible and close jaw
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sternocleidomastoid - clavicular head: origin
sternal end of the clavicle
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sternocleidomastoid - clavicular head: insertion
mastoid process of temporal bone
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sternocleidomastoid - clavicular head: action
opposite rotation of head, lateral flexion of neck
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sternocleidomastoid - sternal head: origin
manubrium of sternum
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sternocleidomastoid - sternal head: insertion
mastoid process of temporal bone
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sternocleidomastoid - sternal head: action
opposite rotation of head, lateral flexion of neck
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erector spinae muscle group: action
extension of verebral column, lateral flexion of vertebral column
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trapezius - upper: origin
occipital bone
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trapezius - upper: insertion
lateral end of clavicle, acromion and spine of scapula
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trapezius - upper: action
elevates scapulae, extends neck
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trapezius - middle: origin
ligamentum nuchae
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trapezius - middle: insertion
lateral end of clavicle, acromion and spine of scapula
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trapezius - middle: action
retraction and abduction of scapulae
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trapezius - lower: origin
spinous processes of throacic vertebrae
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trapezius - lower: insertion
lateral end of clavicle, acromion and spine of scapula
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trapezius - lower: action
depresses scapulae
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deltoid - anterior: origin
lateral end of clavicle
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deltoid - anterior: insertion
deltoid tuberosity of humerus
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deltoid - anterior: action
flexes humerus; medially rotate humerus
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deltoid - middle: origin
acromion of scapula
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deltoid - middle: insertion
deltoid tuberosity
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deltoid - middle: action
abduction of humerus
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deltoid - posterior: origin
spine of scapula
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deltoid - posterior: insertion
deltoid tuberosity
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deltoid - posterior: action
extension and hyperextension of humerus; lateral rotation of humerus
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supraspinatus: origin
supraspinous fossa of scapula
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supraspinatus: insertion
greater tubercle of humerus
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supraspinatus: action
stablize shoulder joint; abducts arm
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infraspinatus: origin
infraspinous fossa of scapula
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infraspinatus: insertion
greater tubercle of humerus
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infraspinatus: action
stablize shoulder joint, laterally rotate humerus
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teres minor: origin
lateral border of scapula
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teres minor: insertion
greater tubercle of humerus
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teres minor: action
stabilize shoulder joint, lateral rotation of humerus
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subscapularis: origin
subscapular fossa of scapula
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subscapularis: insertion
lesser tubercle of humerus
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subscapularis: action
stabilize shoulder joint, medial rotation of humerus
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teres major: origin
inferior angle of scapula
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teres major: insertion
intertubercular sulcus of humerus
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teres major: action
extension and medial rotation of humerus
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latissimus dorsi: origin
spinous processes of lower throacic and lumbar vertebrae, floating ribs, and thoracolumbar fascia
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latissimus dorsi: insertion
intertubercular sulcus of humerus
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latissimus dorsi: action
adduction, extension, and medial rotation of humerus
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biceps brachii - long head: origin
superior border of glenoid fossa on scapula
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biceps brachii - long head: insertion
radial tuberosity
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biceps brachii - long head: action
flexion at elbow and shoulder, supination of forearm
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biceps brachii - short head: origin
coracoid process of scapula
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biceps brachii - short head: insertion
radial tuberosity
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biceps brachii - short head: action
flexion at elbow and shoulder, supination of forearm
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triceps brachii - long head, lateral head, medial head: insertion
olecranon process of ulna
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triceps brachii - long head, lateral head, medial head: action
extension of elbow (long head also adducts humerus)
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piriformis: origin
sacrum
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piriformis: insertion
greater trochanter of femur
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piriformis: action
lateral rotation of thigh, hip abduction
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tensor fasciae latae: origin
anterior superior illiac spine, and illiac crest
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tensor fasciae latae: insertion
illiotibial tract
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tensor fasciae latae: action
laterally supports knee (by tensing illiotibial tract). Also abducts hip
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gracilis: origin
inferior pubic ramus
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gracilis: insertion
medial surface of tibia inferior to medial condyle
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gracilis: action
adducts thigh at hip; flexes leg at knee
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psoas major: action
flexes thigh at hip; flex vertebral column
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vastus lateralis: origin
greater trochanter of femur, linea aspera
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vastus lateralis: insertion
tibial tuberosity via patellar ligament, patella, and quadriceps tendon
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vastus lateralis: action
extends leg at knee
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rectus femoris: origin
anterior inferior illiac spine
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rectus femoris: insertion
tibial tuberosity via patellar ligament, patella, and quadriceps tendon
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rectus femoris: action
extends leg at knee; flexes hip (brings femur close to torso)
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vastus medialis: origin
linea aspera
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vastus medialis: insertion
tibial tuberosity via patellar ligament, patella, and quadriceps tendon
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vastus medialis: action
extends leg at knee
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vastus intermedius: origin
anterolateral surface of femur
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vastus intermedius: insertion
tibial tuberosity via patellar ligament, patella, and quadriceps tendon
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vastus intermedius: action
extends leg at knee
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biceps femoris - long head: origin
ischial tuberosity
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biceps femoris - long head: insertion
head of fibula; lateral condyle of tibia
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biceps femoris - long head: action
knee flexion and hip extension
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biceps femoris - short head: origin
linea aspera of femur
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biceps femoris - short head: insertion
head of fibula; lateral condyle of tibia
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biceps femoris - short head: action
knee flexion; hip extension
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semimembranosus: origin
ischial tuberosity
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semimembranosus: insertion
medial condyle of tibia (posterior surface)
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semimembranosus: action
knee flexion; hip extension
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semitendinosus: origin
ischial tuberosity
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semitendinosus: insertion
proximal, medial surface of tibia
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semitendinosus: action
knee flexion; hip extension
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sartorius: origin
anterior superior illiac spine
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sartorius: insertion
near tibial tuberosity
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sartorius: action
flex, abduct, lateral rotate thigh @ hip joint; knee flexion
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gastrocnemius: origin
just above femoral condyles
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gastrocnemius: insertion
calcaneus via calcaneal tendon
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gastrocnemius: action
plantar flexion; knee flexion
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