OIANs

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Author:
jpowell22
ID:
147126
Filename:
OIANs
Updated:
2012-04-13 18:45:21
Tags:
functional anatomy
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Description:
muscle oians
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  1. masseter
    O- zygomatic arch of temporal bone, and zygomatic process of maxilla

    I- angle of ramus and coronoid process of mandible

    A- B elevation, U ipsilateral lat. deviation

    N- trigeminal n
  2. temporalis
    O- temporal fossa

    I- coronoid process and ramus of mandible

    A- B elevation, retraction, U ipsilateral lat. deviation

    N- trigeminal n
  3. lateral pterygoid
    O- lateral pterygoid plate and greater wing of sphenoid

    I- mandibular condyle and articular disc

    A- B depression, protrusion, U contralateral lat. devation

    N- trigeminal n
  4. medial pterygoid
    O- lateral pterygoid plate of sphenoid, and tuberosity of maxilla

    I- ramus and angle of mandible

    A- B elevation, protraction, U contralateral lat. deviation

    N- trigeminal n
  5. rectus abdominis

    *separated by linea alba
    O- pubis

    I- costal cartilages of 5th, 6th, 7th ribs

    A- trunk flex, compress abdomen

    N- intercostal nn 7-12
  6. external oblique (V shaped)
    O- lower 8 ribs, laterally

    I- iliac crest, linea alba

    A- B trunk flex, compression, U lateral flex, contralateral rotation

    N- intercostal nn 8-12
  7. internal oblique (inverted V)
    O- inguinal ligament, iliac crest, thoracolumbar fascia

    I- ribs 10-12, abdominal aponeurosis

    A- B flex of trunk, compression, U lateral flex, ipsilateral rotation

    N- intercostal nn 8-12
  8. transverse abdominis (deepest)

    *bear down, cough, sneeze, laugh, forced expiration
    O- inguinal ligament, iliac crest, thoracolumbar fascia, last 6 ribs

    I- abdominal aponeurosis, linea alba

    A- compress abdomen

    N- intercostal nn 7-12
  9. erector spinae (sacrospinalis)

    spinalis (medial)
    longissismus (intermediate)
    iliocostalis (lateral)
    O- spinous processes, transverse processes, post. ribs from occiput to sacrum and ilium

    I- same as origin

    A- B extend neck and trunk, U laterally side bend neck and trunk

    N- spinal nerves
  10. transversospinalis (deepest of back extensors, oblique line of pull)

    (semispinalis multifidus rotatroes)
    O- transverse processes

    I- spinous processes of vertebra above

    A- B extend neck and trunk, U contralateral rotation

    N- spinal nerves
  11. interspinale (deep, vertical line of pull)
    O- spinous processes below

    I- spinous processes above

    A- extend neck and trunk

    N- spinal nerves
  12. intertransversarii (deep, vertical line of pull)
    O- transverse processes below

    I- transverse processes above

    A- trunk and neck side bending

    N- spinal nerves
  13. quadratus lumborum (middle position)
    O- iliac crest

    I- ribs 12, transverse processess L1-L5

    A- trunk lateral bending, hip hike

    N- T12-L1 nn
  14. sternocleidomastoid
    O- sternum and clavicle

    I- mastoid process

    A- B flexes neck, U laterally bends the neck, rotates head to opposite side

    N- accessory nerve (11), 2nd and 3rd cervical nerves
  15. scalene muscles
    O- transverse processes of cervical vertebrae

    I- 1st and 2nd rib

    A- B assists in neck flex, U neck lateral bending

    N- lower cervical nerve
  16. splenius capitis

    *most superficial of neck extensors
    O- lower half of nuchal ligament, spinous processes of C7 thru T3

    I- lateral occipital bone, mastoid process

    A- B extends head, U rotate head to same side

    N- middle and lower cervical nerves
  17. splenius cervicis

    *most superficial of neck extensors
    O- spinous processes of T3 thru T6

    I- transverse processes of C1-3

    A- B extends head and neck, U rotate neck to same side

    N- middle and lower cervical nerves
  18. diaphragm

    -separates thoracic and abdominal cabvities
    -large, sheet-like, domed shape
    -three openings for esophagus, aorta, inf vena cava
    O- xiphoid process, ribs, lumbar vertebra

    I- central tendon

    A- inspiration

    -phrenic nerve (C3, C4, C5)
  19. external intercostal

    -V shaped, pulls up
    O- rib above

    I- rib below

    A- elevate ribs

    N- spinal nerves
  20. internal intercostals

    -pull down
    O- rib below

    I- rib above

    A- depress ribs

    N- spinal nerves

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