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A&P 1 CH 9-11

Dr. Cutler SU-Skeletal Muscle List-Orgin-Insertion-Action

NameOriginInsertionAction
PECTORALIS MAJOR Sternum, clavicle Humerus Adduction and medial rotation of humerus
SERRATUS ANTERIOR Upper 8 Ribs Scapula Protracts shoulder and stabilizes scapula
RECTUS ABDOMINIS Pubic symphysis Costal cartilage, xiphoid process Flexion of trunk; compresses abdominal contents
LATISSUMUS DORSI Vertebrae, ribs, thoracolumbar fascia Deltoid tuberosity of humerus Extension and medial rotation of humerus at shoulder
DELTOIDS Clavicle, scapula Deltoid tuberosity Abduction of humerus to 90 degrees
TRAPEZIUS Occipital bone (EOP) and spinous processes to T12 Clavicle, scapula Elevate, retract, and depress scapulae
BICEPS BRACHII Coracoid process and scapula Radial tuberosity (bicipital tuberosity on radius) Flexion at elbow
TRICEPS BRACHII Scapula and posterior humerus Olecranon process of ulna Extension at elbow
SARTORIUS Anterior superior iliac spine (ASIS) Tibial tuberosity (medial) Flexion at knee (“tailor’s position”)
FLEXORS OF FOREARM Medial epicondyle of humerus Metacarpals of wrist Flexion, aBduction, and aDuction of wrist
RECTUS FEMORIS Anterior inferior iliac spine (ASIS) and ilium Tibial tuberosity at patellar tendon Flexion of hip and extension of knee (crosses both joints)
TIBIALIS ANTERIOR Lateral tibia (superior) Medial metatarsal and tarsal (arch) Dorsiflexion of ankle
GASTROCNEMIUS Epicondyles of femur Calcaneus via Achilles tendon Plantarflexion of ankle OR flexion of knee (can’t do both at same time)
MASSETER Zygomatic arch Mandibular ramus (lateral surface of mandible) Elevates mandible (closes jaw and assists protraction)
STERNO-CLEIDO-MASTOID Manubrium, clavicle Mastoid process Flex the neck; rotate head to opposite side
Created by: cambridgedavis
 

 



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