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Origin- Pectoralis Major
clavicle, sternum and costal cartilages of upper ribs
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Insertion- Pectoralis Major
intertubicular groove of humerus
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Action- Pectoralis Major
pulls arm anteriorly and across chest, rotates humerus or adducts arm
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Origin- Deltoid
acromion process, spine of scapula and clavicle
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Insertion- Deltoid
deltoid tuberosity of humerus
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Action- Deltoid
abducts the arm, extends or flexes
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Origin- Biceps Brachii
coracoid process and tubercle above glenoid cavity of scapula
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Insertion- Biceps Brachii
radial tuberosity of radius
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Action- Biceps Brachii
flexes forearm at elbow and rotates arm laterally
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Origin- Rectus Abdominus
crest of symphasis pubis and pubis
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Insertion- Rectus Abdominus
xiphoid process of sternum and costal cartilages of ribs
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Action- Rectus Abdominus
tenses abdominal wall and compresses abdominal contents; also flexes
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Origin- Sartorius
anterior illiac spine
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Insertion- Sartorius
medial surface of tibia
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Action- Sartorius
flexes leg and thigh, abducts thigh, rotates thigh laterally and medially
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Origin- Tibialis Anterior
lateral condyle and lateral surface of tibia
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Insertion- Tibialis Anterior
tarsal bone and 1st metatarsal
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Action- Tibialis Anterior
dorsiflexion and inversion of foot
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Origin- Frontalis
galea aponuerotica
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Insertion- Frontalis
skin of eyebrows and root of nose
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Action- Frontalis
raises eyebrows, wrinkles forehead
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Origin- Masseter
lower border of zygomatic arch
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Insertion- Masseter
lateral surfaces of the mandible
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Action- Masseter
closes jaw
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Origin- Sternoceidomastoid
anterior surface of sternum and upper surface of clavicle
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Insertion- Sternoceidomastoid
mastoid process of temporal bone
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Action- Sternoceidomastoid
pulls head to one side, pulls head toward chest or raises sternum
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Origin- External Oblique
outer surface of lower ribs
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Insertion- External Oblique
outer lip of illiac crest, linea alba
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Action- External Oblique
tenses abdominal wall and compresses contents
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Origin- Rectus Femoris
spine of illium and margin of acetabulum
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Insertion- Rectus Femoris
patella by tendon, continues as patellar ligament to tibial tuberosity of tibia
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Action- Rectus Femoris
extends leg at knee
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Origin- Gluteus Maximus
sacrum, coccyx and posterior surface of illium
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Insertion- Gluteus Maximus
posterior surface of femur and fascia of thigh
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Action- Gluteus Maximus
extends thigh
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Origin- Biceps Femoris
ishial tuberosity and posterior surface of femur
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Insertion- Biceps Femoris
head of fibula and lateral condyle of tibia
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Action- Biceps Femoris
flexes leg, extends thigh
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Origin- Semitendinosus
ishial tuberosity
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Insertion- Semitendinosus
medial surface of tibia
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Action- Semitendinosus
flexes leg, extends thigh
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Origin- Gastrochemius
lateral and medial condyles of femur
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Insertion- Gastrochemius
posterior surface of calcaneus
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Action- Gastrochemius
plantar flexion of foot and fexion of leg at knee
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Origin- Trapezius
occipital bone and spines of cervical and thoracic vertebrae
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Insertion- Trapezius
clavicle; spine and acromion process of scapula
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Action- Trapezius
rotate scapula and raises arm; raises scapula; pulls scapula medially/downward
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Origin- Triceps Brachii
tuberce below glenoid cavity an scapula, lateral and medial surfaces of humerus
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Insertion- Triceps Brachii
olecranon process of ulna
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Action- Triceps Brachii
extends forearm at elbow
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Origin- Latissimus Dorsi
spines of sacral, lumbar and thoracic vertebrae, illiac crest and lower ribs
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Insertion- Latissimus Dorsi
intertubiclar groove of humerus
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Action- Latissimus Dorsi
extends and adducts arm and rotates humerus inwardly, or pull shoulder downward
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