UNIT 2: SPINE AND THORAX - MUSCLE ORIGINS AND INSERTIONS ONLY

What is the origin of the Erector Spinae Group?

Common tendon (thoracolumbar fascia) that attaches to the posterior surface of sacrum, iliac crest, spinous processes of the lumbar, and last two thoracic vertebrae.

What are the insertions of the Erector Spinae Group?

Various attachments at the posterior ribs, spinous and transverse processes of thoracic and cervical vertebrae, and mastoid process of temporal bone.

What is the origin of the multifidi muscles?

Sacrum and transverse processes of lumbar through cervical vertebrae

What is the insertion point of the multifidi muscles?

Spinous processes of lumbar vertebrae through second cervical vertebra

What is the origin of the Rotatores muscles?

Transverse processes of lumbar through cervical vertebrae

What is the insertion of the Rotatores muscles?

Spinous processes of lumbar vertebrae through second cervical vertebra

How many vertebrae do the multifidi and Rotatores span?

Multifidi Span 2-4 vertebrae, rotatores span 1-2

What is the origin of the Semispinalis Capitis?

Transverse processes of C4-T5

Where is the insertion of the Semispinalis Capitis?

Between the superior and inferior nuchal lines of the occiput

What is the origin of the Splenius Capitis?

Inferior one half of ligamentum nuchae and spinous processes of C7-T4

What is the insertion of the Splenius Capitis?

Mastoid process and lateral portion of superior nuchal line

What is the origin of the Splenius Cervicis?

Spinous processes of T3-T6

What is the insertion of the Splenius Cervicis?

Transverse processes of CI-C3

What is the origin of the Quadratus Lumborum?

Posterior iliac crest

What is the insertion of the Quadratus Lumborum?

Last rib and transverse processes of first through fourth lumbar vertebrae

What is the origin of the Rectus Abdominis?

Pubic crest, pubic symphysis

What is the insertion of the Rectus Abdominis?

Cartilage of fifth, sixth, and seventh ribs and xiphoid process

What is the origin of the External Oblique muscle?

External surfaces of fifth to twelfth ribs

What is the insertion point of the External Oblique muscle?

Anterior part of the iliac crest, rectus sheath to linea alba

What is the origin of the Internal Oblique muscle?

Lateral inguinal ligament, iliac crest, and thoracolumbar fascia

What is the insertion of the Internal Oblique muscle?

Internal surface of lower three ribs, rectus sheath to linea alba

What is the origin of the Transversus Abdominis?

Lateral inguinal ligament, iliac crest, thoracolumbar fascia, and internal surface of lower six ribs

What is the insertion of the Transversus Abdominis?

Rectus sheath to linea alba

What is the origin of the diaphragm?

Costal attachment: Inner surface of lower six ribs, Lumbar attachment: Upper two or three lumbar vertebrae, Sternal attachment: Inner part of xiphoid process

What is the insertion of the diaphragm?

Central tendon

What is the origin of the intercostals?

Inferior border of the rib above

What is the insertion of the intercostals?

Superior border of the rib below

What is the origin of the Intertransversarii in the cervical region?

Spanning the transverse processes of vertebrae C2-C7

What is the origin of the Intertransversarii in the lumbar region?

Spanning the transverse processes of vertebrae L1-L5

Where do the Intertransversarii insert?

Transverse processes of the vertebra above

What is the origin of the Interspinalis in the cervical region?

Spanning the spinous processes of vertebrae C2-T3

What is the origin of the Interspinalis in the lumbar region?

Spanning the spinous processes of vertebrae T12-L5

Where does the Interspinalis insert?

Inferior surface of the spinous process above the vertebra of origin