Muscles of the Body Trunk

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Author:
haaveshes
ID:
32901
Filename:
Muscles of the Body Trunk
Updated:
2010-09-05 21:03:36
Tags:
Anatomy Muscles Body Trunk
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Description:
Mucles of the Body Trunk : Origins, Insertion, Action, Innervation
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  1. cremaster muscle
    • Origin- inguinal ligament
    • Insertion-
    • Action- genitofemoral nerve
    • Innervation- raise and lower the scrotum
  2. First two layers of the back
    • 1st layer: A. Trapezius
    • B. Latissimus Dorsi
  3. Ventral Primary Rami ( hypomere)
    Motor
  4. Dorsal Primary Rami (epimere)
    Sensory
  5. What are the respiratory muscles of the back?
    • 1. Serratus posterior Superior
    • 2. Serratus posterior inferior
  6. Serratus Posterior superior (A,O,I, INN)
    • Origin- C7- T3 Spinous process
    • Insertion- Ribs
    • Action- Elevate Ribs ( Inspiration)
    • Innervation- Ventral Primary Rami
  7. Serratus Posterior Inferior
    • Origin- T11- L3 Spinous process
    • Insertion- Ribs ( lower) 9-12
    • Action- Depress Ribs ( expiration)
    • Innervation- Ventral Primary Rami
  8. True Back Muscles
    • Groups:Splenious
    • Erector Spinae
    • Transversospinalis
  9. Splenius Capitus
    • Origin- Ligamentus Nuche
    • Insertion- Mastoid and Nuchal Line
    • Action- Bilateral Flexion and Rotation to the same side
    • Innervation- Dorsal Primary Rami
  10. Splenius Cervicis
    • Origin- Spinous Process T1-T6
    • Insertion- Transverse Process C1- C4
    • Action- Bilateral Flexion and rotate neck to the same side
    • Innervation Dorsal Primary Rami
  11. Erector Spinae Group
    • (I.. Luv.. S(word)..
    • Action: Bilaterally flex, extend and rotate head ( to same side) and vertebral column.
    • -Ilicostalis
    • -longissimus
    • -spinalis
  12. Spinalis
    • Origin- Illiac Crest, Sacrum
    • Insertion- Spinous Process
    • Action- Bilaterally flex, extend and rotate head ( to same side) and vertebral column
    • Innervation- Dorsal Primary Rami of Spinal nerves
  13. Iliocostalis
    • Origin- Sacrm, Illiac Crest, Lumbar Spinous Process
    • Insertion- Ribs
    • Action- Bilaterally flex, extend and rotate head ( to same side) and vertebral column
    • Innervation- Dorsal Primary Rami
  14. Longissimus
    • Origin- Sacrm, Illiac Crest, Lumbar Spinous Process
    • Insertion- Transverse Process
    • Action-Bilaterally flex, extend and rotate head ( to same side) and vertebral column
    • Innervation- Dorsal Primary Rami
  15. Transversospinalis
    • Semispinalis Capitis
    • Multifidi
    • Rotartory
  16. Semispinals Capitis
    • Origin- Transverse Process t6-t7
    • Insertion- Opcipital Bone/ Nuchal Ridges
    • Action- Extends head
    • Innervation- Dorsal Primary Rami
  17. Segmental sensory innervation on a deramtomes of the Nipple
    T-5
  18. Segmental sensory innervation on a deramtomes of the Belly Button
    T-10
  19. The thoracic wall has 3 muscles layers:
    • 1. external intercostal
    • 2. internal intercostal
    • 3. innermost intercostal
    • a. transverse thoracis
    • b. subcostal
  20. External Intercostal Muscle
    • Origin- upper rib, inferior border
    • Insertion- lower rib, upper border
    • Action- : inspiration, (maintains intercostal space)
    • Innervation- intercostal nerves
  21. Internal Intercostal Muscle
    • Origin- lower rib,upper border
    • Insertion- upper rib, inferior border
    • Action- force expiration, (maintains intercostal space)
    • Innervation- : intercostal nerves
  22. Innermost Intercostal
    • Origin: rib above
    • Insertion: rib below
    • Action: ?
    • Innervation: intercostal nerves
  23. External Abdominal Oblique
    • Origin: lower 8 ribs
    • Insertion: linea alba pubic tubercle & crest iliac crest
    • Actions: a. laterally flexes & rotates spine
    • b. increase abdominal pressure
    • c. fixes ribs during forced expiration
    • Nerves: lower intercostal nerves
  24. Internal Abdominal Oblique
    • Origin: lumbar fascia iliac crest inguinal ligament
    • Insertion: linea alba last 4 ribs pubic crest
    • Actions: a. laterally flexes & rotates spine b. increase abdominal pressure c. assists forced expiration
    • Nerves: lower intercostal nerves
  25. Transverse Abdominis
    • Origin: lumbar fascia iliac crest inguinal ligament cartilages of lower 6 ribs
    • Insertion: linea alba pubic crest
    • Actions: laterally flexes & rotates spine increase abdominal pressure assists respiration
    • Nerves: lower intercostal nerves
  26. Rectus Abdominis
    • Origin: pubic bone
    • Insertion: xiphoid process lower 6 ribs
    • Actions: laterally flexes (unilateral) flexes spine (bilateral), assists forced expiration, increases abdominal pressure
    • Nerves: lower intercostal nerves
  27. Tendinous Intersections
    Tendons that run to form the abdominals... 6 pack
  28. linea alba
    The line that goes through the median of the abdomen
  29. The inguinal canal passes through three abdominal muscles or their aponeuroses
    • external oblique
    • internal oblique
    • transverse abdominis
  30. cremaster muscle
    • Origin- inguinal ligament
    • Insertion-
    • Action- genitofemoral nerve
    • Innervation- raise and lower the scrotum

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