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Muscle origins1

Muscle origins

MuscleOriginInsertionJoint Action
Rectus Abdominus pubic crest and pubic symphysis ribs and xiphoid process flexes vertebral column
External Oblique lower eight ribs linea alba and aponeurosis of the external abdominal oblique assists in flexion and rotation of vertebral column
Internal Oblique lumbodorsal fascia and iliac crest linea alba and aponeurosis of internal abdominal oblique assists in flexion and rotation of vertebral column
Transversus Abdominus inguinal ligament, iliac crest, cartilage of last 5-6 ribs, ilium linea alba and pubic crest compresses abdominal contents
Gluteus Maximus posterior ilium, sacrum, and coccyx iliotibial tract, gluteal tuberosity of femur extends and laterally rotates hip
Pectoralis Major sternum, clavicle, and ribs greater tubercle and along intertubercular groove of the humerus flexes, medially rotates, and adducts arm
Pectoralis Minor ribs 3-5 coracoid process of the scapula depresses and pulls scapula anteriorly
Serratus Anterior ribs vertebral border of the scapula draws scapula forward along thoracic wall and rotates scapula
Trapezius occipital bone, cervical and thoracic vertebrae lateral 1/3 of clavicle and scapular spine and acromion elevates, depresses, rotates, adducts scapula
Deltoid (anterior)
Deltoid (middle)
Deltoid (posterior)
Latissimus Dorsi lumbodorsal fascia via thoracic and lumbar vertebrae, sacrum, ilium intertubercular groove of the humerus extends, adducts, and medially rotates arm
Rhomboids spinous processes of thoracic vertebrae vertebral border of the scapula adducts, rotates scapula
Adductor Magnus inferior ramus of pubis and ischium, ischial tuberosity lineas aspera of femur adducts and flexes thigh at hip
Tensor Fasciae Latae anterior superior iliac spine, iliac crest iliotibial tract flexes and abducts thigh
Triceps Brachii
Biceps Brachii
Brachialis anterior humerus coronoid process of the ulna flexes forearm
Pronator Teres medial epicondyle of the humerus radius pronates forearm
Supinator lateral epicondyle of the humerus proximal end of radius supinates forearm
Flexor Digitorum
Extensor Digitorum tibia philanges flex foot
Sartorius anterior superior iliac spine medial aspect of knee flexes, laterally rotates thigh
Rectus Femoris anterior inferior iliac spine patella and tibial tuberosity extends knee, flexes thigh at hip
Vastus Intermedius shaft of the femur patella and tibial tuberosity extends knee
Vastus Lateralis greater trochanter of the femur patella and tibial tuberosity extends knee
Vastus Medialis linea aspera patella and tibial tuberosity extends knee, stabilize patella
Tibialis Anterior lateral condyle of tibia tarsals dorsiflexion, inverts foot, support arch
Biceps Femoris ischial tuberosity(l) linea aspera/distal femur(s) fibula, lateral tibia extends thigh, flex knee , LATERAL rotate
Semitendinosus ischial tuberosity upper tibial shaft extends thigh, flex knee, medial rotate leg
Semimembranosus ischial tuberosity medial condyle of tibia extends thigh, flex knee, medial rotate leg
Gastrocnemius femur calcaneus extend foot, flex lower leg
Soleus tibia calcaneus extend foot
Peroneus Longus
Sternocleidomastoid manubrium and clavicle mastoid process of temporal bone rotates head, flexes cervical vertebrae
Spinalis upper lumbar, lower thoracic vertebrae vertebrae extends vertebrae
Iliocostalis ribs ribs draws ribs together
Longissimus vertebrae, transverse process vertebrae extends vertebrae
Semispinalis
Iliposoas iliac fossa, transverse processes of lumbar vertebrae lesser trochanter of the femur flexes hip
Created by: chephi16
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