APK2100C OIA

Rectus abdominis - Origin

Pubic crest and pubic symphysis

Rectus abdominis - Insertion

Xiphoid process and costal cartilages

Rectus abdominis - Action

Flexes the trunk

Gluteus maximus - Origin

Ilium, sacrum, and coccyx

Gluteus maximus - Insertion

Gluteal tuberosity of femur

Gluteus maximus - Action

Extends the thigh

Biceps femoris - Origin

Long head: ischial tuberosity; Short head: linea aspera

Biceps femoris - Insertion

Head of fibula and lateral condyle of tibia

Biceps femoris - Action

Extends the hip and flexes the knee

Semitendinosus - Origin

Ischial tuberosity

Semitendinosus - Insertion

Medial, upper shaft of tibia

Semitendinosus - Action

Extends the hip and flexes the knee

Semimembranosus - Origin

Ischial tuberosity

Semimembranosus - Insertion

Medial condyle of tibia

Semimembranosus - Action

Extends the hip and flexes the knee

Psoas major - Origin

Lumbar vertebrae

Psoas major - Insertion

Lesser trochanter of femur

Psoas major - Action

Flexes the hip and trunk

Iliacus - Origin

Iliac fossa and ala of sacrum

Iliacus - Insertion

Lesser trochanter of femur

Iliacus - Action

Flexes the hip and trunk

Rectus femoris - Origin

Anterior inferior iliac spine and acetabular labrum

Rectus femoris - Insertion

Patella and tibial tuberosity

Rectus femoris - Action

Extends the knee and flexes the hip

Vastus medialis - Origin

Linea aspera, medial supracondylar line, and intertrochanteric line

Vastus medialis - Insertion

Patella and tibial tuberosity

Vastus medialis - Action

Extends the knee

Vastus lateralis - Origin

Linea aspera, greater trochanter, and intertrochanteric line

Vastus lateralis - Insertion

Patella and tibial tuberosity

Vastus lateralis - Action

Extends the knee

Vastus intermedius - Origin

Anterior shaft of femur

Vastus intermedius - Insertion

Patella and tibial tuberosity

Vastus intermedius - Action

Extends the knee

Adductor magnus - Origin

Ischial and pubic rami, and ischial tuberosity

Adductor magnus - Insertion

Linea aspera and adductor tubercle of femur

Adductor magnus - Action

Adducts the hip

Gracilis - Origin

Inferior ramus and body of pubis, and ischial ramus

Gracilis - Insertion

Medial condyle of tibia

Gracilis - Action

Adducts the hip

Gastrocnemius - Origin

Medial and lateral condyles of femur

Gastrocnemius - Insertion

Posterior calcaneus via calcaneal tendon

Gastrocnemius - Action

Plantarflexion and knee flexion

Soleus - Origin

Superior tibia, fibula, and interosseous membrane

Soleus - Insertion

Posterior calcaneus via calcaneal tendon

Soleus - Action

Plantarflexion

Tibialis anterior - Origin

Lateral condyle and proximal shaft of tibia

Tibialis anterior - Insertion

Medial cuneiform and 1st metatarsal

Tibialis anterior - Action

Dorsiflexion

Sternocleidomastoid - Origin

Manubrium and clavicle

Sternocleidomastoid - Insertion

Mastoid process

Sternocleidomastoid - Action

Flexes neck and laterally rotates cervical spine

Deltoid - Origin

Clavicle, acromion, and spine of scapula

Deltoid - Insertion

Deltoid tuberosity of humerus

Deltoid - Action

Abducts the shoulder

Pectoralis major - Origin

Clavicle, sternum, and costal cartilages

Pectoralis major - Insertion

Greater tubercle of humerus

Pectoralis major - Action

Flexes, medially rotates, and adducts the shoulder

Biceps brachii - Origin

Short head: coracoid process; Long head: supraglenoid tubercle

Biceps brachii - Insertion

Radial tuberosity

Biceps brachii - Action

Flexes elbow and supinates proximal radioulnar joint

Triceps brachii - Origin

Long head: infraglenoid tubercle; Lateral/Medial heads: posterior humerus

Triceps brachii - Insertion

Olecranon process

Triceps brachii - Action

Extends the elbow