Muscular System (OIA)

• Biceps brachii

  
  

  (O): Small tubercle near dorsal margin of glenoid fossa of scapula by tendon

  (I): Bicipital tuberosity of radius by tendon

  (A): Flexes antebrachium
• Biceps femoris

  (O): Ischial tuberosity

  (I): By broad aponeurosis to patella and proximal half of tibia

  (A): Flexes crus and abducts thigh
• External Oblique

  (O): Posterior 9th or 10th ribs and lumbodorsal fascia

  (I): Mainly on linea alba from sternum to pubis by aponeurosis

  (A): Constricts abdomen
• Gracilis

  (O): Pubic and ischial symphyses

  (I): Proximomedial surface of tibia and crural fascia

  (A): Adducts thigh and flexes crus
• Internal Oblique

  (O): Lumbodorsal fascia and iliac crest

  (I): Linea alba by aponeurosis

  (A): Constricts abdomen
• Latissimus dorsi

  (O): Lumbodorsal fascia

  (I): Medial surface of proximal diaphysis of humerus

  (A): Draws humerus posterodorsally
• Levator scapulae ventralis

  (O): Occipital bone and transverse process of atlas

  (I): Ventrally on metacromion and infraspinous fossa of scapula

  (A): Draws scapula anteriorly
• Mylohyoid

  (O): Medial surface of dentary

  (I): Midventral raphe; posterior fibers to basihyoid bone

  (A): Elevates floor of oral cavity and draws hyoid anteriorly
• Pectoantebranchialis

  (O): Manubrium of sternum

  (I): Fascia covering proximal surface of antebrachium

  (A): Adducts humerus
• Pectoralis major

  (O): Anterior sternebrae

  (I): Pectoral ridge of humerus

  (A): Adducts humerus
• Pectoralis minor

  (O): Body of sternum

  (I): Pectoral ridge of humerus

  (A): Adducts humerus
• Rectus femoris

  (O): Ventral margin of ilium anterior to acetabulum

  (I): Lateral surface of patella

  (A): Extends crus
• Sartorius

  (O): Iliac crest and anteromedial margin of ilium

  (I): Proximomedial surface of tibia and patella

  (A): Adducts thigh and contributes to extension of crus
• Teres major

  (O): Dorsal third of posterior border of scapula

  (I): Medial surface of humerus by tendon in common with latissimus dorsi

  (A): Flexes and medially rotates humerus
• Transversus abdominis

  (O): Costal cartilage of vertebrocostal and vertebral ribs, transverse processes of lumbar vertebrae, and ventral margin of ilium

  (I): Linea alba

  (A): Constricts abdomen
• Triceps brachii lateral head

  (O): Deltoid ridge of humerus

  (I): Olecranon process of ulna by a common tendon

  (A): Extend antebrachium
• Triceps brachii long head

  (O): Posterior border of scapula near glenoid fossa

  (I): Olecranon process of ulna by a common tendon

  (A): Extend antebrachium
• Triceps brachii medial head

  (O): Shaft of humerus

  (I): Olecranon process of ulna by a common tendon

  (A): Extend antebrachium
• Vastus lateralis

  (O): Greater trochanter and dorsolateral surface of femur

  (I): Lateral surface of patella

  (A): Extends crus
• Vastus medialis

  (O): Shaft of femur

  (I): Medial surface of patella and patellar ligament

  (A): Extends crus
• Xiphihumeralis

  (O): Xiphoid process of sternum

  (I): Near distal border of bicipital groove of humerus

  (A): Adducts forelimb