LAB 2

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Author:
juliagoolia299
ID:
128956
Filename:
LAB 2
Updated:
2012-01-19 09:48:40
Tags:
muscles abdominal wall
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Description:
muscles of the abdominal wall
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  1. external oblique superior attachment
    external surfaces of 5th-12th ribs
  2. external oblique inferior attachment
    linea alba, pubic tubercle, anterior half of iliac crest
  3. external oblique innervation
    thoracoabdominal nerves (T7-T11 spinal nerves) and subcostal nerve
  4. external oblique main action
    compresses and supports abdominal viscera; flexes and rotates trunk to contralateral side
  5. internal oblique proximal attachment
    thoracolumbar fascia, anterior 2/3rds iliac crest, connective tissue deep to lateral third of inguinal ligament
  6. internal oblique distal attachment
    inferior borders of 10th-12th ribs, linea alba, and pecten pubis via conjoint tendon
  7. internal oblique innervation
    anterior(ventral) rami T6-T12 spinal nerves and first lumbar nerve
  8. internal oblique main action
    compresses and supports abdominal viscera, flexes and rotates trunk ipsilaterally
  9. rectus abdominis inferior attachment
    pubic symphysis and pubic crest
  10. rectus abdominis superior attachment
    xiphoid process and 5th-7th costal cartilages
  11. rectus abdominis innervation
    ventral rami of T6-T12 spinal nerves
  12. rectus abdominis main action
    flexes trunk (lumbar vertebrae) and compresses abdominal viscera; stabilizes and controls tilt of pelvis (antilordosis)
  13. transversus abdominis proximal attachment
    internal surfaces of 7th-12th costal cartilages, thoracolumbar fascia, iliac crest, and connective tissue deep to lateral third of inguinal ligament
  14. transversus abdominis distal attachment
    linea alba with aponeurosis of internal oblique, pubic crest, and pecten pubis via conjoint tendon
  15. transversus abdomins innervation
    ventral rami T6-T12 spinal nerves and first lumbar nerves
  16. transversus abdominis main action
    compresses and supports abdominal viscera; stabilizes lower back
  17. iliocostalis proximal attachment
    thoracolumbar fascia, spinous processes of lumbar and sacral vertebrae, iliac crest
  18. iliocostalis distal attachment
    angle of lower ribs and cervical transverse processes
  19. iliocostalis innervation
    respective spinal nerves of each region (dorsal rami of spinal nerves)
  20. iliocostalis main action
    extends and laterally bends vertebral column
  21. longissimus proximal attachment
    thoracolumbar fascia, spinous processes lumbar and sacral vertebrae, iliac crest
  22. longissimus distal attachment
    between tubercles and angles of ribs, transverse processes of thoracic and cervical vertebra, mastoid process
  23. longissimus innervation
    respective spinal nerves of each region (dorsal rami of spinal nerves)
  24. longissimus main action
    extends and laterally bends vertebral column and head
  25. spinalis proximal attachment
    thoracolumbar fascia, spinous processes lumbar and sacral vertebra, iliac crest
  26. spinalis distal attachment
    spinous processes of upper thoracic and midcervical vertebra
  27. spinalis innervation
    respective spinal nerves of each region (dorsal rami of spinal nerves)
  28. spinalis main action
    extends vertebral column
  29. semispinalis capitis proximal attachment
    transverse processes of C7-T6
  30. semispinalis capitis distal attachment
    superior & inferior nuchal lines, spinous processes of cervical and thoracic regions
  31. semispinalis capitis innervation
    respective spinal nerves of each region (dorsal rami of spinal nerves)
  32. semispinalis capitis main action
    extends head and neck, unilaterally contralaterally rotates neck
  33. splenius capitis proximal attachment
    nuchal ligament, spinous process C7-T3
  34. splenius capitis distal attachment
    mastoid process and lateral third of superior nuchal line
  35. splenius capitis innervation
    middle cervicle nerves (dorsal rami of spinal nerves)
  36. splenius capitis main action
    • bilaterally: extends head
    • unilaterally: laterally bends (flexes) and rotates head ipsilaterally
  37. splenius cervicis proximal attachment
    spinous process T3-T6
  38. splenius cervicis distal attachment
    transverse process C1- C3
  39. splenius cervicis innervation
    lower cervical nerves (dorsal rami of spinal nerves)
  40. splenius cervicis main action
    • bilaterally: extends neck
    • unilaterally: laterally bends (flexes) and rotates neck ipsilaterally
  41. sternocleidomastoid proximal attachment
    • sternal head: manubrium
    • clavicular head: superior medial third of clavicle
  42. sternocleidomastoid distal attachment
    mastoid process and lateral half of superior nuchal line
  43. sternocleidomastoid innervation
    spinal root of cranial nerve (spinal accessory nerve CN XI) and C2-C3 spinal nerve (for pain & proprioception)
  44. sternocleidomastoid main action
    • unilaterally: laterally flexes and rotates head contralaterally
    • bilaterally: flex neck
  45. anterior scalene proximal attachment
    anterior tubercles of transverse processes of C3-C6
  46. anterior scalene distal attachment
    first rib
  47. anterior scalene innervation
    cervical spinal nerves C5-C7
  48. anterior scalene main action
    flexes neck laterally; elevates first rib
  49. middle scalene proximal attachment
    posterior tubercles of transverse processes of C2-C7
  50. middle scalene distal attachment
    first rib
  51. middle scalene innervation
    cervical spinal nerves C3-C8
  52. middle scalene main actoin
    flexes neck laterally; elevates first rib
  53. posterior scalene proximal attachment
    posterior tubercles of transverse processes of C4-C6
  54. posterior scalene distal attachment
    second rib
  55. posterior scalene innervation
    cervical spinal nerves C6-C8
  56. posterior scalene main action
    flexes neck laterally; elevates second rib

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