Origin/Insertion/Action
O: Sternum, Clavicle
I: Mastoid process of temporal bone
A: Flexes head at neck
Sternocleidomastoid
O: Medial wall of orbit
I: Circular path around orbit
A: Close eye
Orbicularis Oculi
O: Tubercle superior to the glenoid cavity, Coracoid process of scapula
I: Radialtuberosity of radius
A: Flexes forearm at elbow
Biceps Brachii
O: Occipital bone, Cervical vertebrae, Thoracic vertebrae
I: Clavicle, Acromion, Spine of scapula
A: Adduct and rotate scapula
Trapezius
O: Distal end of humerus
I: Styloid process of radius
A: Flex forearm at elbow
Brachioradialis
O: Femur
I: Calcaneus (Achilles tendon)
A: Plantar flexes foot at ankle
Gastrocnemius
O: Acromial end of clavicle, Acromion, Spine of scapula
I: Deltoid tuberosity of humerus
A: Abduct and flex arm at shoulder
Deltoid
O: Parietal Bone
I: Mandible
A: Elevates and retracts mandible
Temporalis
O: Pubis, Pubic symphysis
I: Rib cartilage, Xiphoid process
A: Flexesvertebral column
Rectus Abdominis
O: Ilium
I: Body (shaft) of tibia
A: Flexes, abducts, and rotates thigh at hip
Sartorius
O: Maxilla, Zygomatic Arch
I: Mandible
A: Elevates mandible
Masseter
O: Thoracic vertebrae, lumbar vertebrae, Sacrum, Ilium, Ribs
I: Humerus
A: Extends and adducts arm at shoulder
Latissimus Dorsi
O: Pubis
I: Iliac crest, Linea Alba
A: Lateral flexion of vertebral column
External Oblique
O: Iliac crest, Inguinal ligament, Thoracolumbar fascia
I: Rib cartilage, Linea alba
A: Lateral flexion of vertebral column
Internal Oblique
O: 1 location on scapula, 2 locations on humerus
I: Olecranon process of ulna
A: Extends forearm at elbow
Triceps Brachii
O: Superior aspect of 8th & 9th ribs
I: Vertebral border of scapula
A: Abduct & rotate the scapula
Serratus Anterior
O: Iliac crest, Inguinal ligament, Thoracolumbar fascia, Rib cartilage
I: Xiphoid process, Linea Alba, Pubis
A: Compresses abdomen
Transverse Abdominis
O: Ilium
I: Greater trochanter of femur
A: Abducts thigh at hip
Gluteus Medius
O: Ischial tuberosity of ischium
I: Body (shaft) of tibia
A: Flexes leg at knee
Semitendinosus
O: Ischial tuberosity of ischium
I: Medial condyle of tibia
A: Flexes leg at knee
Semimembranosus
O: Linea aspera of femur
I: Patella,Tibial tuberosity
A: Extend leg at knee
Vastus Medialis
O: Greater tochanter and linea aspera of femur
I: Patella,Tibial tuberosity
A: Extend leg at knee
Vastus Lateralis
O: Clavicle, Sternum, Rib cartilage
I: Humerus
A: Adducts and medially rotates arm at shoulder
Pectoralis Major
O: Ischial tuberosity of ischium, linea aspera of femur
I: Fibula, lateral condyle of tibia
A: Flexes leg at knee
Biceps Femoris
O: Lateral condyle of tibia, Border of tibia
I: 1st Metatarsal,Cuneiform
A: Dorsiflex foot at ankle
Tibialis Anterior