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CHAPTER 10 MUSCULAR SYSTEM

CHAPTER 10 MUSCULAR SYSTEM. 2 Muscles of the face & head (Aponeurosis/Fascia: Flat, sheet-like tendon) Figure 10.6 page: 331 A. Epicranius- frontalis & occipitalis 1. Word derivation a. Epi: (G) on top of b. Cranius: (L) skull 2. Origin: Occipital bone

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CHAPTER 10 MUSCULAR SYSTEM

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  1. CHAPTER 10 MUSCULAR SYSTEM

  2. 2 Muscles of the face & head • (Aponeurosis/Fascia: Flat, sheet-like tendon) • Figure 10.6 page: 331 • A. Epicranius- frontalis & occipitalis • 1. Word derivation • a. Epi: (G) on top of • b. Cranius: (L) skull • 2. Origin: Occipital bone • 3. Insertion: skin/muscles around eye • 4. Action: Raise eyebrows • B. Orbicularis Oculi • 1. Derivation: (L) circular/round & eye • 2. O: Maxilary & frontal bones • 3. I: Skin around eye • 4. A: Closes eye (Sphincter muscle)

  3. 3 Figure 10.6 page: 331

  4. 4 C. Orbicularis Oris • 1. Oris (L) mouth • 2. O: Muscles near mouth • 3. I: skin of lips • 4. A: Closes and “pucker ups” lips (Sphincter) • D. Temporalis – video • 1. (L): side of head - temple region • temporalis bone • 2. O:Temporal bone • 3. I: Lateral surface of mandible • 4. A: Closes jaw #51 • E. Zygomaticus • 1. (G) Bar • 2. O: Zygomatic bone • 3. I: Obicularis oculi • 4. A: Raises corner of mouth (smile)

  5. 5 Figure 10.6 page: 331

  6. Temporalis Video #51

  7. 6 F. Buccinator – video #5 • 1. (L) Trumpeter • 2. O: Outer surface of maxilla & mandible • 3. I: Obicularis oris • 4. A: Compresses cheeks inwards • G. Masseter – video #31 • 1. (G) Chew • 2. O: Lower border of Zygomatic arch • 3. I: Lateral surface of mandible • 4. A: Closes jaw/chew

  8. 7. Figure: 107a: pg. 333

  9. Buccinator video #5

  10. Masseter muscle video #31

  11. 8 H. Sternocliedomastoid(eus)- SCM • 1. origins & insertions • 2. O: Sternum & clavicle(cliedeo, G-hook) • 3. I: mastoid process of temporal bone • 4. A: singly- rotate head, together- flex neck • I. Splenius capitis #47 • 1. • 2. O: Spinous & transverse processes of • lower cervical & upper thoracic vertebrae • 3. I: Mastoid process • 4. A: Rotate head, laterally flex neck

  12. 9 Fig. 10.9 a; pg. 337 SCM

  13. 10 Fig. 10.9b : page 337 splenius capitis

  14. Spleenius capitus Video #47

  15. .11I. Semispinalis Capitis #42 1. semi = half (origin ½ & ½) 2. O: Spinous & transverse processes of lower cervical & upper thoracic vertebrae 3. I: Occipital bone 4. A: Extend, laterally flex & rotate neck

  16. 12 Figure: 10.9 d page:339 Semispinalis capitis

  17. Semispinalis capitis video #42

  18. 13 Muscles of the pectoral girdle • Posterior • Fig. 10.13 c; page 348 • A. Trapezius #58 • 1. Shape: trapezoid • 2. O: Occipital bone, spinous process of cervical & thoracic spine • 3. I: Clavicle; spine & acromion process of scapula 4. A: Raises & rotates scapula • B. Rhomboid Major #38 • 1. Shape rhomboid • 2. O: Spinous processes of upper thoracics • 3. I: Medial boarder of scapula • 4. A: Raises & Adducts scapula

  19. 14 Fig. 10.13 c; page 348 trapezius & rhomboid

  20. Trapezius video #58

  21. Rhomboid major video #38

  22. 15 C. Levator Scapulae #29 1. Lifts scapula 2. O: Transverse processes of C-spine 3. I: Margin(superior/medial) of scapula 4. A:raises & adducts scapula Pectoral girdle, anterior. Fig. 10.13 a pg. 347 D. Serratus anterior #44 1. (L) saw toothed 2. O: Outer surface of upper ribs 3. I: Ventral surface of scapula 4. A: Pulls scapula anterior & down (inferior)

  23. 16 Fig. 10.13 c; page 348levator scapulae

  24. Levator scapulae – video #29

  25. 17 Figure: 10.13a; page: 347 serratus anterior

  26. Serratus anterior – video #44

  27. 18 E. Pectoralis minor #34Fig. 10.13 a; pg.347 1. (L) Chest 2. O: Sternal ends of upper ribs 3. I: Coracoid process (scapula) 4. A: Pulls scapula anterior & down Rotator cuff muscles(SITS) Fig. 10.14 b; page. 351 A. Supraspinatus* #50 1. Superior to scapula spine 2. O: Superior posterior aspect of scapula 3. I: Greater tubercle of humerous 4. A: Initiates arm abduction first 15 degrees

  28. 19 Fig. 10.13 a; pg.347 pectoralis minor

  29. Pectoralis minor – video #34

  30. 20 Fig. 10.14b; page. 351 supraspinatis

  31. Supraspinatus video # 50

  32. 21 B. Infraspinatus #25 1. Inferior to scapular spine 2. O: Inferior posterior scapula 3. I: Greater tubercle of humerous 4. A: External rotation of arm C.Teres minor #53 1. (l) Long and round 2. O: Lateral boarder of scapula 3. Greater tubercle of humerous 4. A: Rotate arm externally

  33. 22 Fig. 10.14b; page. 351 infraspinatus & teres minor

  34. Infraspinatus – video # 25

  35. Teres minor – video #53

  36. 23 D. Subscapularis* #48Fig. 10.14 d; pg. 352 1. Underneath (anterior) side of scapular spine 2. O: Anterior surface of scapula 3. I: Lesser tubercle of humerous 4. A: Prime mover - Rotates arm internally

  37. 24 Subscapularis* Fig. 10.14 d; pg. 352

  38. Subscapularis video #48

  39. 25 Muscles of the glenohumeral joint shoulder/upper arm Anterior muscles Figure 10.13 a; pg. 347 A. Pectoralis Major #33 1. (l) Chest 2. O: Clavicle, sternum & cartilagof upper ribs 3. I: Intertubercular grove of humerous 4. A: prime mover for upperar adduction

  40. 26 Figure 10.13 a; pg. 347 pectoralis major

  41. Pectoralis major video33

  42. 27 • B. Deltoid - #6 • figures 10.13 a&c pgs. 347 & 348 • Delta 1. (l) triangle shape • 2. O: Scapula, acromion process, spine, clavicle • 3. I: Deltoid tuberosity of humerous • 4. A: Prime mover for arm adduction (middle fibers), also flexes & extends arm

  43. 28 figures 10.13 a pgs. 347 deltoid anterior

  44. Deltoid muscle #6

  45. 29 figures 10.13c pgs 348 deltoid, posteror

  46. 30 Posterior C. Latisimus dorsi (lats) #28 1. lats/wings 2. O: Spinous processes of sacral, lumbar & lower thoracic spine 3. I: Intertubercular grove 4. A: Prime mover for upper arm adduction Fig. 10.14b; pg. 251 Muscles that move the elbow Fig. 10.14 a&b pages: 351 & 352 Anterior chamber

  47. 31 Fig. 10.14b; pg. 251 latisssimus dorsi

  48. Latisimus dorsi video-28

  49. 32 A. Brachialis #3 1. (l) arm 2. Origin: anterior distal humerous 3. Insertion: coronoid process of ulna 4. Prime mover for forearm (elbow) flexion B. Biceps brachii #1 1. (l) arm & muscle has 2 heads 2. Origin: short head: coricoid process long head: glenoid tubercle & glenoidcavity 3. Insertion: Radial tuberosity 4. Not the prime mover- synergist for flexion; supination of wrist

  50. 33 Figure: 10.14 d; page 352 brachialis

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