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Skeletal Muscles for Identification- know origin, insertion and action when indicated Muscle Muscles of facial expression Occipitofrontalis (epicranius) Corrugator supercilii Orbicularis oculi Orbicularis oris Buccinator Zygomaticus Origin Insertion Action --- --- --- --------Zygomatic bone Levator labii superioris Depressor labii inferioris Depressor anguli oris ------- --------Skin, muscle at corners of mouth ------- --------Smiling (raises mouth corners up) ----“tragedy mask” grimace, crying (depresses mouth corners) Zygomatic arch, maxilla --- Mandible --- Closes jaw/mouth --- --Styloid process (temporal bone) ----- --Hyoid bone --Moves hyoid during swallowing ----- Manubrium, medial clavicle Head flexion and lateral head flexion ------- Muscles of mastication Masseter Temporalis Muscles of Tongue, Throat and Anterior neck Platysma Stylohyoid Digastricus Sternohyoid Muscles of the Neck, Vertebral Column Sternocleidomastoid ----- Splenius capitis Erector spinae Muscles of Respiration External intercostals Internal intercostals Diaphragm Muscles of the Abdominal Wall Rectus abdominis ----- Mastoid process (temporal bone), occipital bone ----- ------- ------- Pubis bone External oblique --- Xiphoid process, costal cartilages --- --Back extension Flex vertebral column, depress ribs --- Internal oblique Transverses abdominis Muscles of the Shoulder, Back and Chest Pectoralis major Pectoralis minor Serratus anterior Trapezius Levator scapulae Rhomboid major Latissiumus dorsi Deltoid Supraspinatus Infraspinatus Subscapularis Teres major Levator scapulae Muscles of the Arm Triceps brachii Biceps brachii Coracobrachialis Brachialis Brachioradialis Flexor carpi radialis Flexor carpi ulnaris Flexor digitorum superficialis Extensor carpi radialis brevis Extensor digitorum Extensor pollicis longus Muscles of the Hip and Leg ----- ----- Sternum, clavicle, costal cartilages ----------Spinal prcesses of thoracic and lumbar vertebrae, iliac crest Acromion and spine of scapula Intertubercular groove (humerus) ----------Intertubercular groove (humerus) ----------- ----- Arm flexion, medial rotation, adduction ----------Arm extension, adduction, medial rotation Deltoid tuberosity Arm abduction, flexion, (humerus) extension, and medial and lateral rotation! --------------------- Scapula, proximal humerus Corocoid process and upper glenoid cavity(scapula), intertubercular groove (humerus) --------Medial epicondyle (humerus), olecranon process (ulna) --- Olecranon process (ulna) Radial tuberosity Forearm extension --------Pisiform and hamate bones --------Wrist flexion --- --- --- --- --- ----- ----- ----- Forearm flexion, supination Iliopsoas Sartorius --Anterior superior iliac spine (ilium) Adductor longus --Gracilis --Quadruceps femoris: rectus Anterior inferior iliac femoris, vastus lateralis, spine (ilium), proximal vastus medialis femur Gluteus maximus Dorsal ilium, sacrum, coccyx Hamstrings: biceps --femoris, semitendinosus, semimembranosus Tibialis anterior --Fibularis longus --Extensor digitorum longus --Gastrocnemius Medial and lateral condyles (femur) Soleus --Flexor digitorum longus --Flexor hallucis longus --- --Medial, proximal tibia ----Patella and tibial tuberosity --Thigh flexion, abduction, lateral rotation ----Knee extension Iliotibial tract, proximal femur --- Thigh extension, lateral rotation --- ------Calcaneus bone ------Plantar flexion, knee flexion ------- -------