Selected%20Skeletal%20Muscles%20Along%20With%20Origin,%20Insertion%20And%20Action%20Of%20Some%20Major%20Muscles

1
Selected Skeletal Muscles Along With Origin,
Insertion And Action Of Some Major Muscles
2
Muscles of Facial Expression And Mastication
Muscle Origin Insertion Action
Masseter Zygomatic bone/arch Mandibular ramus/angle Elevates mandible
Temporalis Temporal bone/fossa Coronoid process of mandible Elevates mandible
Digastric Inferior mandible Hyoid bone Depresses mandible
3
Muscles Of Head and Neck
Muscle Origin Insertion Function
Sternocleidomastoid Manubrium (sternum) and medial clavicle Mastoid process of temporal bone Head rotation
Digastric Inferior mandible Hyoid bone Depresses mandible
4
Muscle Origin Insertion Function
Rectus abdominis Pubic symphysis Xyphoid process, costal cartilages of ribs 5-7 Flexes vertebral column, compresses abdomen
Pectoralis major Clavicle, sternum, costal cartilages of ribs 1-7 Greater tubercle of humerus Flexes, adducts and medially rotates arm
Biceps brachii Coracoid process and supraglenoid tubercle of scapula Radial tuberosity Flexes forearm
5
Muscle Origin Insertion Function
Trapezius Occipital protuberance dorsal spinous processes of thoracic vertebrae Clavicle, scapula (acromian process of spine) Extends head, elevates scapula
Latissimus dorsi T7-sacrum iliac crest Humerus head Extends arms, adducts and medially rotates arm
6
Muscle Origin Insertion Function
Rhomboidis (major and minor) Dorsal spinous processes of C7-T5 Medial border of scapula Adducts scapula
Deltoid Clavicle, acromian process, spine of scapula Deltoid tuberosity of humerus Abducts arm
Triceps brachii Scapula and humerus Olecranon process of ulna Extends forearm
7
(No Transcript)
8
Antero-medial
Postero-lateral
9
Anterior Shoulder
10
(No Transcript)
11
(No Transcript)
12
Muscles Origin Insertion Function
Ilipsoas Transverse processes ofT12-L5 iliac fossa Lesser trochanter of femur Major flexion of thigh
Sartorius Anterior superior iliac spine Proximal tibia Flexes and laterally rotates thigh
13
Lateral
Medial
14
The biceps femoris, semitendinosus and
semimembranosus muscles are collectively called
hamstring muscles.
Muscles Origin Insertion Function
Hamstrings Ischial tuberosity Head of Fibula, proximal part of tibia Extends thigh
Glutens maximus Iliac crest, sacrum, coccyx Proximal part of femur Extends 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.
Muscle Origin Insertion Function
Quadriceps femoris muscles Ilium (rectus femoris) and femur Tibial tuberosity Extends leg rectus femoris also flexes thigh
16
Muscle Origin Insertion Function
Tibialis anterior Lateral condyle and head of tibia Metatarsal 1 Dorsiflexion
Gastrocnemius Condyles of femur Calcaneous Plantar (flexes) foot
17
(No Transcript)
18
Histology Of Muscles
19
(No Transcript)
20
Skeletal Muscle
21
(No Transcript)
22
(No Transcript)
23
(No Transcript)