Presentation on theme: "MUSCULAR SYSTEM. All movements require muscles, which are organs that use chemical energy to contract Because they contract, they: Cause Movement."— Presentation transcript:
All movements require muscles, which are organs that use chemical energy to contract Because they contract, they: Cause Movement Maintain Posture Stabilize Generates Heat
MAJOR SKELETAL MUSCLES You have to know origin, insertion, and function Origin = the immovable end of the muscle Insertion = movable end of the muscle When a muscle contracts the insertion is moved toward the origin
MuscleOriginInsertionFunction TemporalisTemporal Fossa of temporal bone Coronoid process of mandible elevates mandible OccipitalisSuperior Nuchal line on Occipital Cranial aponeurosisdraws scalp back MasseterZygomatic ArchMandibleelevates mandible SternocleidomastoidManubrium of sternum and clavicle Mastoid process of temporal bone Draws head toward shoulder FrontalisCranial AponeurosisSkin around eyebrows elevate eyebrows Orbicularis OculiFrontal and Maxillary Bone Skin of eyelidclose eyelid ZygomaticusZygomatic BoneSkin around mouthdraw angle of lip upward Orbicularis OrisOther mouth muscles Muscles and skin around mouth closes mouth BuccinatorMaxillary bone and mandible Fibers of orbicularis oris draws cheeks against teeth
MuscleOriginInsertionFunction TrapeziusSuperior nuchal line of occipital Clavical and ScapulaElevates and depresses scapula ObliqueLower 8 ribsIliac spine and pubic crest Flexes and laterally bend the trunk Rectus abdominusPubis and Symphysis Pubis Xiphoid Process of sternum and costal cartilage of ribs 5-7 Flexes trunk Latissimus dorsiT7 to Sacrum, iliac crest, and lower ribs Intertubercular groove of humerous Extends the arm and rotates the arm Rhomboid majorT2-T5ScapulaRetracts, elevates and rotates scapula Pectoralis MajorClavical, manubrium/ body of sternum, costal cartilage 2-6 Greater tubercle of humerus Flexes and adducts arm, medially rotates arm Gluteus MaximusSacrum and coccyxGluteal tuberosity of femur Extends thigh, laterally rotates femur Gluteus MinimusIliumGreater trochanter of femur Abducts the femur, medially rotates thigh
MuscleOriginInsertionFunction DeltoidClavical and scapulaDeltoid tuberosityAbducts arm Triceps brachiiScapula and humerous Olecranon process of ulna Extends forearm Extensor digiorumLateral epicondyle of humerous phalangesExtends digits and wrist Flexor carpiepicondyleMetacarpalsFlexes wrist adducts hand BrachioradialisHumerousStyloid process of radius Flexes elbow, pronation and supination
MuscleOriginInsertionFunction GracilisSymphysis pubis and pubic bone TibiaAdducts thigh, medially rotates thigh, flexes leg Biceps femorisIschial tuberosityHead of Fibula and lateral condyle of tibia Extends thigh, flexes leg Rectus femorisIliac spine and acetabulum Patella and tibial tuberosity Extends leg and flexes thigh SatoriusIliac spineTibiaAbducts and laterally rotates thigh GastrocnemiusFemur- condyleCalcaneusFlexes leg and foot SoleusHead of fibula and tibia CalcaneusPlantar flexes foot Tibialis anteriorLateral condyle of tibia Tarsals and Metatarsals Planter flexes foot and inverts foot
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