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Selected Skeletal Muscles Along With Origin, Insertion And Action Of Some Major Muscles.

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Presentation on theme: "Selected Skeletal Muscles Along With Origin, Insertion And Action Of Some Major Muscles."— Presentation transcript:

1 Selected Skeletal Muscles Along With Origin, Insertion And Action Of Some Major Muscles

2 Muscles of Facial Expression And Mastication MuscleOriginInsertionAction MasseterZygomatic bone/archMandibular ramus/angle Elevates mandible TemporalisTemporal bone/fossaCoronoid process of mandible Elevates mandible DigastricInferior mandibleHyoid boneDepresses mandible

3 Muscles Of Head and Neck MuscleOriginInsertionFunction SternocleidomastoidManubrium (sternum) and medial clavicle Mastoid process of temporal bone Head rotation DigastricInferior mandible Hyoid boneDepresses mandible

4 Anterior ChestInferior Chest Plate MuscleOriginInsertionFunction Rectus abdominisPubic symphysisXyphoid process, costal cartilages of ribs 5-7 Flexes vertebral column, compresses abdomen Pectoralis majorClavicle, sternum, costal cartilages of ribs 1-7 Greater tubercle of humerusFlexes, adducts and medially rotates arm Biceps brachiiCoracoid process and supraglenoid tubercle of scapula Radial tuberosityFlexes forearm

5 Posterior MuscleOriginInsertionFunction TrapeziusOccipital protuberance; dorsal spinous processes of thoracic vertebrae Clavicle, scapula (acromian process of spine) Extends head, elevates scapula Latissimus dorsiT7-sacrum; iliac crestHumerus headExtends arms, adducts and medially rotates arm

6 Posterior MuscleOriginInsertionFunction Rhomboidis (major and minor) Dorsal spinous processes of C7-T5 Medial border of scapulaAdducts scapula DeltoidClavicle, acromian process, spine of scapula Deltoid tuberosity of humerus Abducts arm Triceps brachiiScapula and humerusOlecranon process of ulnaExtends forearm

7 Anterior Face and Neck Anterior Face

8 Antero-medialPostero-lateral

9 Posterior Shoulder And Brachium Anterior Shoulder

10 Anterior Forearm Posterior Forearm

11 Medial Forearm Lateral Forearm

12 AnteriorPosterior MusclesOriginInsertionFunction IlipsoasTransverse processes ofT12-L5; iliac fossa Lesser trochanter of femur Major flexion of thigh SartoriusAnterior superior iliac spineProximal tibiaFlexes and laterally rotates thigh

13 LateralMedial

14 Posterior Thigh The biceps femoris, semitendinosus and semimembranosus muscles are collectively called hamstring muscles. MusclesOriginInsertionFunction HamstringsIschial tuberosityHead of Fibula, proximal part of tibia Extends thigh Glutens maximusIliac crest, sacrum, coccyxProximal part of femurExtends thigh

15 1. Psoas major 2. Iliacus Together these two muscles make up the iliopsoas 3. Gracilis 4. Sartorius 5. Rectus femoris 6. Vastus medialis 7. Vastus lateralis Muscles 5,6,7 together with the Vastus intermedius, which is under the Rectus femoris, make up the Quadriceps femoris. MuscleOriginInsertionFunction Quadriceps femoris muscles Ilium (rectus femoris) and femur Tibial tuberosityExtends leg; rectus femoris also flexes thigh

16 Lateral Leg MuscleOriginInsertionFunction Tibialis anteriorLateral condyle and head of tibia Metatarsal 1Dorsiflexion GastrocnemiusCondyles of femurCalcaneousPlantar (flexes) foot


18 Histology Of Muscles


20 Skeletal Muscle




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