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Muscles – Summary of Origins, Insertions and Actions Lab Muscle 7 Frontalis Axial Temporalis Masseter Orbicularis oris Orbicularis oculi Sternocleidomastoid Trapezius 8 Origin Epicranial aponeurosis Temporal bone Zygomatic arch Muscles around mouth Frontal and maxilla bones Sternum and clavicle Serratus anterior Occipital protuberance, ligamentum nuchae, C7-T12 Ribs 1-9 Rectus abdominis Pubic crest and symphysis External oblique Internal oblique Transversus abdominis Iliopsoas Ribs 5-12 Iliac crest, inguinal ligament Iliac crest, inguinal ligament, ribs 5-10 Iliac fossa, lumbar vertebrae Insertion Skin near eyebrows Coronoid process of mandible Ramus of mandible Lips Eyelids Mastoid process of temporal bone Clavicle, acromion and spine of scapula Medial border of the scapula Xiphoid process and cartilage of ribs 5-7 Iliac crest, linea alba Linea alba, ribs 7-10 Linea alba, pubis Lesser trochanter of femur Lower Adductor muscle group Pubic symphysis, ischial tuberosity Quadriceps femoris Anterior inferior iliac spine, anterior proximal femur Sartorius Anterior superior iliac spine Medial femur Patella and tibial tuberosity Gluteus medius Gluteus maximus Lateral ilium Dorsal ilium, sacrum, coccyx Hamstring group Ischial tuberosity & posterior femur Gastrocnemius Medial and lateral condyles of femur Greater trochanter of femur Gluteal tuberosity of femur, iliotibial tract (fascia) Head of fibula, lateral condyle of tibia Calcaneus Soleus Tibialis anterior Posterior tibia, proximal fibula Lateral proximal tibia Extensor digitorum longus Upper medial tibia Calcaneus Inferior medial cuneiform and metatarsal 1 Anterior tibia, interosseous membrane, Phalanges 2-5 shaft of fibula Action Raises eyebrows Elevates mandible Elevates mandible Closes lips Closes eyelids 1: Rotation at neck 2: Flexion at neck Extension at neck, rotation and adduction of scapula Protracts scapula (“Boxer’s muscle”) Flexion of trunk Flexion and rotation of trunk Flexion and rotation of trunk Flexion and rotation of trunk Flexion of hip, lumbar spine stabilization Adduction at hip Extension at knee, flexion at hip Hip flexion, knee flexion, lateral rotation of thigh Abduction at hip Extension, abduction and lateral rotation at hip Flexion at knee, extension at hip Plantar flexion at ankle, flexion at knee Plantar flexion at ankle Dorsiflexion and inversion at ankle Dorsiflexion, extension of toes 8 Rotator cuff muscles Scapula Triceps brachii Latissimus dorsi Inferior margin of glenoid cavity, posterior surface of humerus T7-L5, sacrum, iliac crest, ribs 10-12 Pectoralis major Clavicle, sternum, ribs 1-7 Deltoid Clavicle, acromion and spine of scapula Coracoid process and superior margin of glenoid cavity Medial epicondyle of humerus Upper Biceps brachii Greater & lesser tubercles of humerus Olecranon process of ulna Stabilization of shoulder joint, rotation of humerus Extension at elbow Intertubercular groove of humerus Intertubercular groove of humerus Deltoid tuberosity of humerus Adduction, extension, and medial rotation at shoulder Adduction, flexion and medial rotation at shoulder Abduction, flexion, extension, and rotation at shoulder Flexion and lateral rotation at elbow Flexion of wrist and fingers Radial tuberosity Flexor group of Palmar surface of hand forearm Extensor group of Lateral epicondyle of humerus Dorsal surface of hand Extension of wrist and fingers forearm 31 Skeletal Muscles - Supplement for Bio130 Lab Manual (Smith & Jurukovski, 3rd Ed.) - SCCC – Ammerman Mark K. Kenny, Ph.D.
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