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Spine/Thorax

Origins/Insertions/Actions

QuestionAnswer
Erector Spinae Group: Origin/ Insertion O: Common tendon that attaches to post. surface of sacrum, iliac crest, spinous processes of lumbar&last 2 thoracic verte. I: Various attachments at post. ribs, spinous&transverse processes of thoracic & cervical verte. &mastoid process of temporal bone
Erector Spinae Group: Action A: Unilaterally: Laterally flex vertebral column to the same side Bilaterally: Extend the vertebral column
Spinalis O: Spinous processes of upper lumbar & lower thoracic vertebrae & C-7, ligament nuchae I: Spinous processes of upper thoracic,cervicals, except C-1
Longissimus O: Common tendon, transverse processes of upper 5 thoracic vertebrae I: Lower 9 ribs, transverse processes of thoracic & cervical vertebrae, mastoid process of temporal bone
Iliocostalis O: Common tendon, posterior surface of ribs 1-12 I: Transverse processes of lumbar vertebrae 1-3&posterior surface of ribs 1-12, posterior surface of ribs 1-6, transverse processes of lower cervicals
Multifidi O: Sacrum and transverse processes of lumbar through cervical vertebrae I: Spinous processes of lumbar vertebrae through 2nd cervical vertebrae A: Unilaterally: Rotate vertebral column to opposite side Bilaterally: Extend the vertebral column
Rotatores O: Transverse processes of lumbar through cervical vertebrae I: Spinous processes of lumbar vertebrae through 2nd cervical vertebrae A: Unilaterally: Rotate vertebral column to opposite side Bilaterally: Extend the vertebral column
Semispinalis Capitis O: Transverse processes of C-4 to T-5 I: Between superior and inferior nuchal lines of the occiput A: Extend the vertebral column and head
Splenius Capitis O: Inferior 1 half of ligament nuchae & spinous processes of C-7 to T-4 I: Mastoid process & lateral portion of superior nuchal line A: Unilateral: -Rotate head & neck to same side -Laterally flex head & neck to same side Bilateral: Extend head & neck
Splenius Cervicis O: Spinous processes of T-3 to T-6 I: Transverse processes of C-1 to C-3 A: Unilateral: -Rotate head and neck to same side -Laterally flex head and neck to same side Bilateral: Extend head and neck
Rectus Capitis Posterior Major O: Spinous processes of axis C-2 I: Inferior nuchal line of occiput A: -Rock and tilt head back into extension -Rotate the head to the same side
Rectus Capitis Posterior Minor O: Tubercle of posterior arch of atlas C-1 I: Inferior nuchal line of occiput A: Rock and tilt the head back into extension
Oblique Capitis Superior O:Transverse process of atlas C-1 I: Between nuchal lines of occiput A: -Rock and tilt the head back into extension -Laterally flex the head to the same side
Oblique Capitis Inferior O: Spinous process of axis C-2 I: Transverse process of atlas C-1 A: Rotate the head to the same side
Quadratus Lumborum O: Posterior iliac crest I: Last rib & transverse processes of 1st-4th lumbar vertebrae A: Uni: -Laterally tilt pelvis -Laterally flex vertebral column to same side -Assist to extend vertebral column Bi: Fix last rib during forced in/ex-halation
Rectus Abdominis O: Pubic crest, pubic symphysis I: Cartilage of 5th, 6th, & 7th ribs and xiphoid processes A: -Flex vertebral column -Tilt pelvis posteriorly
External Oblique O: External surfaces of 5th-12th ribs I: Anterior part of iliac crest, abdominal aponeurosis to linea alba A: Uni: -Laterally flex vertebral column to same side -Rotate vertebral column to opposite side Bi: -Flex vertebral column -Compress ab content
Internal Oblique: Origin/Insertion O:Lateral inguinal ligament, iliac crest, thoracolumbar fascia I: Internal surface of lower 3 ribs, abdominal aponeurosis to linea alba
Internal Oblique: Action A: Unilateral: -Laterally flex vertebral column to same side -Rotate vertebral column to same side Bilateral: -Flex vertebral column -Compress abdominal contents
Transverse Abdominis O: Lateral inguinal ligament, iliac crest, thoracolumbar fascia, internal surface of lower 6 ribs I: Abdominal aponeurosis to linea alba A: Compress abdominal contents
Diaphragm O: Costal: Inner surface of lower 6 ribs Lumbar: Upper 2-3 lumbar vertebrae Sternal: Inner part of xiphoid process I: Central tendon A: -Draw down central tendon -Increase the volume of thoracic cavity during inhalation
External Intercostals O: Inferior border of the rib above I: Superior border of the rib below A: Draw the ribs superiorly to assist with inhalation
Internal Intercostals O: Inferior border of the rib above I: Superior border of the rib below A: Draw the ribs interiorly to assist with exhalation
Serratus Posterior Superior O: Spinous processes of C-7 - T-3 I: Posterior surface of 2nd - 5th ribs A: Elevate the ribs during inhalation
Serratus Posterior Inferior O: Spinous processes of T-12 - L-3 I: Posterior surface of 9th-12th ribs A: Depress the ribs during exhalation
Intertransversarii O&I: Cervical: Spanning the transverse processes of vertebrae C-2 - C-7 Lumbar:Spanning the transverse processes of vertebrae L-1 - L-5 A: Unilateral: Laterally flex the vertebral column to the same side Bilateral: Extend the vertebral column
Interspinalis O&I: Cervical: Spanning the spinous processes of C-2 - T-3 Lumbar: Spanning the spinous processes of T-12 - L-5 A: Extend the vertebral column
Created by: maddileigh