1. Muscular System

2. Anterior muscle attachment & Actions

3. “Origin and insertion"
Origin – where the fixed end of the muscle attaches to the bone (cartilage or connective tissue)
Insertion – where the movable end of the muscle attaches to another structure

4. Origin: Temporal Bone Insertion: Mandible Movement (Action):
Temporalis
Origin: Temporal Bone
Insertion: Mandible
Movement (Action):
Closes Jaw

5. Origin: Frontal Bone and Maxilla
Orbicularis Oculi
Origin: Frontal Bone and Maxilla
Insertion: Tissue around the eye
Movement (Action):
Blinks and Closes Eyes

6. Origin: Mandible and Maxilla
Orbicularis Oris
Origin: Mandible and Maxilla
Insertion: Skin and muscles around the mouth
Movement (Action):
Closes and protrudes lips

7. Sternocleidomastoid
Origin: sternum and clavicle
Insertion: mastoid process of temporal bone
Movement: flex and laterally rotates neck

8. Pectoralis major
Origin: sternum and clavicle
Insertion: humerus
Movement: flexes shoulder, medially rotates arm, adducts arm

9. Deltoid
Origin: clavicle, scapula
Insertion: humerus
Movement: flexion, abduction, extension of shoulder

10. External oblique
Origin: ribs
Insertion: pelvis (ilium)
Movement: flexion at the hips and spine

11. Biceps Brachii
Origin: scapula
Insertion: radius
Movement: forearm flexion and supination

12. Triceps Brachii
Origin: scapula and humerus
Insertion: ulna
Movement: extends forearm

13. Latissimus Dorsi
Origin: thoracic vertebra, ribs, pelvis
Insertion: humerus
Movement: extends, adducts, medially rotates shoulder

14. Quadriceps femoris
Origin: pelvis, femur
Insertion: patella and tibia
Movement: extends knee, flexes hip

15. hamstrings
Origin: pelvis
Insertion: tibia and fibula
Movement: extends hip, flexes knee, medially and laterally rotates leg

16. “Naming muscles”
1. )Number of Origins: (the end of the muscles that does not move)
Biceps: 2 origins
Triceps: 3 origins
Quadriceps: 4 origins

17. 2. Direction of muscle fibers
Rectus: muscles are parallel to the body
Transverse: muscles are perpendicular to the body
Oblique: muscles are at an angle to the body

18. 3. SHape Deltoid: delta shape Trapezius: trapezoid shape
Orbicularis oculi: circular
Serratus Anterior: “saw toothed”
Teres major: long and round

19. 4. Location- based on the location
Zygomaticus major: zygomatic bone
Frontalis: frontal bone
Orbicularis “Oculi”: eye
Temporalis: temporal bone

20. 5. Origin & Insertion Sternocleidomastoid
The muscles is has the name of the place it begins (origin) and the place it inserts (insertion) in its name.
Sternocleidomastoid
Sterno= sternum
Cleido= clavicle
Mastoid= mastoid process of temporal bone

21. 6. size Maximus: large muscle Gluteus Maximus Medius: moderate size
Gluteus Medius
Minimus: small muscle
Gluteus Minimus
Longus: long muscle
Extensor Digitorum Longus
Brevis: short muscle
Extensor Digitorum Brevis

22. 7. Action The movement that occurs when the muscle contracts.
Adductor Longus
Abductor Digiti Minimi
Extensor Digitorum
Flexor Digitorum