erector spinae group muscles
Medial to lateral: spinalis, longissimus, iliocostalis
spinalis movements
Unilaterally: laterally flex to the same side
Bilaterally: extend the spine
spinalis group o/i
O:
I:
Longissimus movements
Unilaterally: laterally flex to the same side
Bilaterally: extend the spine
Longissimus o/i
O:
I:
Iliocostalis movements
Unilaterally: laterally flex to the same side
Bilaterally: extend the spine
Iliocostalis o/i
O:
I:
Multifidi and rotatores movements
Unilaterally: rotate to the opposite side
Bilaterally: extend the vertebral column
Multifidi and rotatores o/i
O:
I: SP of lumbar vertebrae though cervical vertebrae
(multifidi span 2-4 vertebrae while rotators span 1-2)
Semispinalis capitis movements
extends the vertebral column and head
Semispinalis capitis o/i
O: TP of C4-T5
I: between the superior and inferior nuchal lines of the occiput
Splenius capitus and cervicis movements
Unilaterally: sidebend and rotate to the same side
Bilaterally: extend the head/neck
Splenius capitus and cervicis o/i
O:
I:
Rectus capitis posterior major movements
rocks and tilts the head back into extension
rotates head to the same side
Rectus capitis posterior major o/i
O: SP of axis C2
I: inferior nuchal line of the occiput
Rectus capitis posterior minor movements
rocks and tilts the head back into extension
Rectus capitis posterior minor o/i
O: posterior arch tubercle of C1
I: inferior nuchal line of the occiput
Oblique capitis superior movements
rocks and tilts the head back into extension
laterally flexes the head
Oblique capitis superior o/i
O: TP of C1
I: between the nuchal lines of the occiput
Oblique capitis inferior movements
rotates head to the same side
Oblique capitis inferior o/i
O: SP of C2
I: TP of C1
Quadratus lumborum movements
Unilaterally:
Bilaterally:
-fix the last rib during forced inhalation and exhalation
Quadratus lumborum o/i
O: posterior iliac crest
I: last rib and TP of 1-4 lumbar vertebrae
Rectus abdominis movements
flexes the vertebral column
posteriorly tilts the pelvis