Muscles AOI Flashcards
Biceps Brachii
O: coracoid process, supraglenoid tubercle
I: Tuberosity of radius
A: Flexes forearm
Triceps Brachii
O: Lateral side, posterior side, of humerus, infraglenoid tubercle
I: Ulnar olecranon process
A: Extends forearm
Deltoid
O: Scapular spine, acromion process
I: deltoid tuberosity of humerus
A: Abducts humerus
Pectoralis Major
O: Superior half of costal cartilages, Anterior surface of sternum, medial half of clavicle
I: Bicipital groove of humerus
A: Internally rotates, adducts humerus
Trapezius
O: External occipital protuberance, spinous process of cervical and thoracic vertebrae
I: Acromion process, scapular spine, clavicle
A: Rotates, retracts, elevates scapula, extends head
Masseter
O: Maxilla, Zygomatic arch
I: Mandibular ramus, angle
A: Elevates mandible
Sternocleidomastoid
O: Sternal manubrium, clavicle
I: Mastoid process of temporal bone
A: Flexes neck, lateral flexion of head
Latissimus dorsi
O: Spinous process of thoracic and lumbar vertebrae
I: Intertubercle groove of humerus
A: Adducts, internally rotates humerus
Rectus Abdominis
O: Pubic crest
I: Mid costal cartilages, Xiphoid process
A: Flexion of lower spine
Sartorius
O: Iliac spine of pelvic bone
I: Anteromedial surface of tibia
A: flexion, abduction, flexes knee
Biceps Femoris
O: Linea aspera of femur, ischial tuberosity
I: Fibular head, Lateral tibial condyle
A: Flexes, laterally rotates knee, extends femur
Semiteninosus
O: Ischial tuberosity
I: Tendon on medial side of tibia
A: Flexion of knee, extension of femur
Semimembranosus
O: Ischial tuberosity
I: Medial tibial condyle
A: Flexion of knee, extension of femur
Gastrocnemius
O: Lateral and medial femoral condyle
I: Calcaneal tendon
A: Plantar flexion of foot, knee flexion
Rectus Femoris
O: Anterior inferior iliac spine
I: Patellar tendon
A: Knee extension, femoral flexion
