Trunk and Lumbar
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| Rectus Abdominis origin? | Pubic Symphosis
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| Rectus Abdominus Insertion? | Ribs 5-7 and Xiphoid process
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| Rectus Abdominus Action? | Trunk flexion, pelvic posterior tilt (bilateral), Lateral Flexion (ipsilatieral)
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| Rectus Abdominus Nerve? | Last 6 intercostals
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| Obliquus Externus origin? | Last 8 ribs
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| Obliquus Externus Insertion? | Rectus sheath, inguinal ligament, iliac
crest
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| Obliquus Externus Action? | Trunk flexion and posterior pelvic tilt (bilateral), lateral flexion and pelvic elevation (ipsilateral), trunk rotation (contralateral)
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| Obliquus Externus Nerve? | Last 7 intercostals
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| Obliquus internus origin? | Inguinal ligament, iliac crest and
thoracolumbar fascia
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| Obliquus internus insertion? | Pubic crest, lower ribs, and rectus sheath
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| Obliquus internus action? | Trunk flexion and pelvic posterior tilt
(bilateral), rotation, lateral flexion,
and pelvic elevation (ipsilateral)
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| Obliquus internus nerve? | Last 3 intercostals
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| Quadratus Lumborum origin? | Iliac crest
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| Quadratus Lumborum Insertion? | Transverse processes, 12th rib
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| Quadratus Lumborum Action? | Trunk extension and pelvic anterior tilt (bilateral), lateral flexion and pelvic elevation (ipsilateral)
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| Quadratus Lumborum Nerve? | T12, L1-L3 from lumbar plexus
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| Diaphragm origin? | Xiphoid process, last 7 ribs,1st four lumbar vertebra
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| Diaphragm insertion? | Central tendon
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| Diaphragm action? | -Principal muscle of respiration
-Draws central tendon downwards
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| Diaphragm nerve? | Phrenic (C3-C5)
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| External intercostals origin? | Inferior border of rib above
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| External intercostals insertion? | Superior border of rib below
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| External intercostals action? | Elevates ribs during inspiration
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| External intercostals nerve? | Intercostals
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| Levatores costarum longi and breves origin? | Transverse process of C7, T1-T11
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| Levatores costarum longi and breves insertion? | Rib one or two below
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| Levatores costarum longi and breves action? | Elevates ribs, lateral flexion and extension of spine
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| Levatores costarum longi and breves nerve? | Dorsal Rami
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| Serratus posterior superior origin? | Spinous processes of C7-T3
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| Serratus posterior superior insertion? | Ribs 2-5
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| Serratus posterior superior action? | Elevation of ribs
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| Serratus posterior superior nerve? | Intercostals 2-5
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| Serratus posterior inferior origin? | Spinous processes T11-L3
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| Serratus posterior inferior insertion? | Last four ribs
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| Serratus posterior inferior action? | Depresses ribs
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| Serratus posterior inferior nerve? | Intercostals 9-12
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| Internal intercostals origin? | Superior border of rib below
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| Internal intercostals insertion? | Inferior border of rib above
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| Internal intercostals action? | Depresses ribs during expiration
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| Internal intercostals nerve? | Intercostals
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| Subcostals origin? | Rib
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| Subcostals insertion? | rib
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| Subcostals action? | depresses rib
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| Subcostals nerve? | intercostals
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| Transversus abdominis origin? | Last 6 ribs, iliac crest, inguinal ligament, thoracolumbar fascia
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| Transversus abdominis insertion? | Pubic bone and rectus sheath
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| Transversus abdominis action? | -Constricts abdominal contents
-Assists in forced expiration
-Helps to stabilize the trunk
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| Transversus abdominis nerve? | Last 6 intercostals
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| Transversus thoracis origin? | Distal 1/3 sternum, cartilage of ribs 4-7
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| Transversus thoracis insertion? | Cartilage of ribs 2-6
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| Transversus thoracis action? | Depress ribs
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| Transversus thoracis nerve? | Intercostals
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Created by:
rmart11
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