Axial Muscles

Human Axial Muscles

1. Axial MusclesAxial Muscles
__
11-11-11

2. Axial MusclesAxial Muscles
•Have both their origins and insertions on parts of the Have both their origins and insertions on parts of the
axial skeleton. axial skeleton.
•Move the head and spinal column.Move the head and spinal column.
•nonverbal communication nonverbal communication
•chewingchewing
•swallowingswallowing
•Aid breathing.Aid breathing.
•Support and protect the abdominal and pelvic organs.Support and protect the abdominal and pelvic organs.
•Not responsible Not responsible for stabilizing or moving the pectoral or for stabilizing or moving the pectoral or
pelvic girdles or their attached limbs.pelvic girdles or their attached limbs.
11-11-22

3. Muscles of Facial ExpressionMuscles of Facial Expression
•Originate in the superficial fascia or on the skull bones. Originate in the superficial fascia or on the skull bones.
•Insert into the superficial fascia of the skin. Insert into the superficial fascia of the skin.
•Contort Contort the skinthe skin causing it to movecausing it to move. .
11-11-33

4. 44

5. 55

6. 66

7. 77

8. 88

9. Muscles of MasticationMuscles of Mastication
•Refers to the process of Refers to the process of chewingchewing. .
•Move the mandible at the temporomandibular joint. Move the mandible at the temporomandibular joint.
•Paired muscles of mastication Paired muscles of mastication
•temporalis temporalis
•masseter masseter
11-11-99

10. 1010

11. Anterior and Lateral Neck Anterior and Lateral Neck
MusclesMuscles
•FlexFlex the head and neck downward. the head and neck downward.
•““neck flexion”neck flexion” and and “head flexion”“head flexion” refer to the refer to the same movementsame movement
•The main muscles are the sternocleidomastoid and the three The main muscles are the sternocleidomastoid and the three
scalenes. scalenes.
11-11-1111

12. 1212

13. Posterior Neck MusclesPosterior Neck Muscles
•ExtendExtend the head/neck. the head/neck.
•The trapezius attaches to the skull and helps extend the The trapezius attaches to the skull and helps extend the
head/neck. head/neck.
•Primary function is to help move Primary function is to help move the pectoral girdle.the pectoral girdle.
11-11-1313

14. 1414

15. 1515

16. Muscles of Respiration Muscles of Respiration
•RespirationRespiration involves involves inhalationinhalation and and exhalation.exhalation.
•DiaphragmDiaphragm
•Internal intercostalsInternal intercostals
•External intercostalsExternal intercostals
11-11-1616

17. 1717

18. 1818

19. 1919

20. 2020

21. The DiaphragmThe Diaphragm
•Is an internally placed, Is an internally placed, dome-shapeddome-shaped muscle. muscle.
•Forms a Forms a partitionpartition between the thoracic and abdominal cavities. between the thoracic and abdominal cavities.
•The most important muscle associated with breathing. The most important muscle associated with breathing.
11-11-2121

22. Muscles of the Abdominal Muscles of the Abdominal
WallWall
•Four pairs of musclesFour pairs of muscles collectively compress and collectively compress and hold the hold the
abdominal organs in placeabdominal organs in place. .
•the external obliquethe external oblique
•internal oblique internal oblique
•transversus abdoministransversus abdominis
•rectus abdominisrectus abdominis
•Work together to Work together to flexflex and and stabilizestabilize the vertebral column. the vertebral column.
•When they unilaterally contract they When they unilaterally contract they laterally flexlaterally flex the vertebral the vertebral
column.column.
11-11-2222

23. 2323

24. 2424

25. 2525