Lab 1 - Back, Spine & Spinal Cord Flashcards

1
Q

iliocostalis

action, innervation, inferior / superior attachment?

A

action

1) spine extension (bilateral contraction)
2) lateral bending (unilateral contraction)

innervation

posterior rami of lumbar, thoracic, and cervical spinal nerves

inferior attachment

pelvis (iliac crest), sacrum, L5-L1 vertebrae (spinous processes)

superior attachment

ribs 1-12 (angles)

T12-C3 vertebrae (transverse processes)

Note: iliocostalis = lumborum, thoracis, cervicis

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2
Q

longissimus

action, innervation, inferior/superior attachment?

A

action

1) spine extension (bilateral contraction)
2) lateral bending (unilateral contraction)

innervation

posterior rami of lumbar, thoracic, and cervical spinal nerves

inferior attachment

L4-T1 vertebrae (transverse processes)

superior attachment

ribs 1-12 (lateral to tubercles), C7-C3 vertebrae (transverse processes), temporal bone (mastoid process)

Note: longissimus = lumborum, thoracis, cervicis

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3
Q

spinalis

action, innervation, inferior / superior attachment?

A

action

upper spine or atlanto-occipital joint extension (bilateral contraction)

innervation

posterior rami of thoracic and cervical spinal nerves

inferior attachment

L5-T1 vertebrae (spinous processes)

superior attachment

T12-C7 vertebrae (spinous processes)

occipital bone (between superior and inferior nuchal lines)

Note: spinalis = thoracis, cervicis, capitis

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4
Q

what are the 3 erector spinae muscles, starting laterally and moving medially toward spine?

A

iliocostalis

longissimus

spinalis

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