Hmn Mus Anat Spine and Thorax OIAN

Erector spinae muscles origin

spinous processes, transverse processes, and posterior ribs from the occiput to the sacrum and ilium

Erector spinae muscles insertion

spinous processes, transverse process, and posterior ribs from the occiput to the sacrum and ilium

Erector spinae muscles action

bilaterally: extend neck and trunk, unilaterally: laterally bend neck and trunk

Erector spinae muscles innervation

spinal nerves

Transversospinalis origin

transverse processes

Transversospinalis insertion

spinous processes of vertebra above origin

Transversospinalis action

bilaterally: extend neck and trunk, unilaterally: rotate neck and trunk to opposite side

Transversospinalis innervation

spinal nerves

Splenius capitis origin

lower half of nuchal ligament, spinous processes of C7-T3

Splenius capitis insertion

lateral occipital bone, mastoid process

Splenius capitis action

bilaterally: extend head and neck, unilaterally: rotate and lateral bend the face to the same side

Splenius capitis innervation

middle and lower cervical nerves

Splenius cervicis origin

spinous processes of T3-6

Splenius cervicis insertion

transverse processes of C1-3

Splenius cervicis action

bilaterally: extend neck, unilaterally: rotate and laterally bend the neck to the same side

Splenius cervicis innervation

middle and lower cervical nerves

Suboccipital muscle group includes

Obliquus capitis superior, obliquus capitis inferior*, rectus capitis posterior minor, rectus capitis posterior major*

Suboccipital muscle location

posterior

Suboccipital muscle action (obliquus capitis inferior*, rectus capitis posterior major*)

lateral bending and rotation to the same side, extension of neck (all)

Quadratus lumborum origin

iliac crest

Quadratus lumborum insertion

12th rib, transverse processes of all 5 lumbar vertebrae

Quadratus lumborum action

trunk lateral bending (on same side)

Quadratus lumborum innervation

12th thoracic and first lumbar nerves

Rectus abdominis origin

pubis

Rectus abdominis insertion

xiphoid process and costal cartilages of 5-7 ribes

Rectus abdominis action

trunk flexion, compression of abdomen

Rectus abdominis innervation

7th - 12th intercostal nerves

External oblique origin

lower 8 ribs laterally

External oblique insertion

iliac crest and linea alba

External oblique action

bilaterally: trunk flexion, compression of abdomen, unilaterally: lateral bending, rotation to opposite side

External oblique innervation

8-12th intercostal, iliohypogastric, ilioinguinal nerves

Internal oblique origin

inguinal ligament, iliac crest, throacolumbar fascia

Internal oblique insertion

10-12th ribs, abdominal aponeurosis

Internal oblique action

bilaterally: trunk flexion, compression of abdomen, unilaterally: lateral bending, rotation to same side

Internal oblique innervation

8-12th intercostal, iliohypogastric, and ilioinguinal nerves

Transverse abdominis origin

inguinal ligament, iliac crest, thoracolumbar fascia, and last 6 ribs

Transverse abdominis insertion

abdominal aponeurosis and linea alba

Transverse abdominis action

compression of abdomen

Transverse abdominis innervation

7-12th intercostal, iliohypogastric, and ilioinguinal nerves

Diaphragm origin

xiphoid process, ribs, lumbar vertebrae

Diaphragm insertion

central tendon

Diaphragm action

inspiration

Diaphragm innervation

phrenic nerve

External intercostals origin

rib above

External intercostals insertion

rib below

External intercostals action

elevate ribs

External intercostals innervation

intercostal nerve

Internal intercostals origin

rib below

Internal intercostals insertion

rib above

Internal intercostals action

depress ribs

Internal intercostals innervation

intercostal nerve

Serratus posterior superior origin

nuchal ligament and spinous processes of C7-T3

Serratus posterior superior insertion

superior border of 2nd - 4th ribs

Serratus posterior superior action

elevate ribs

Serratus posterior superior innervation

2nd - 5th intercostal nerves

Serratus posterior inferior origin

spinous processes of T11-L2 vertebrae

Serratus posterior inferior insertion

inferior borders of 8-12th ribs

Serratus posterior inferior action

depress ribs

Serratus posterior inferior innervation

9-12th thoracic spinal nerves

Intertransversarii origin

transverse process below

Intertransversarii insertion

transverse process above

Intertransversarii action

neck and trunk lateral bending

Intertransversarii innervation

spinal nerves

Interspinales origin

spinous process below

Interspinales insertion

spinous process above

Interspinales action

neck and trunk extension

Interspinales innervation

spinal nerves