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20 Cards in this Set
- Front
- Back
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mm of back organized into 3 layers
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superficial
intermediate deep |
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all back mm ...
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move vertebral column
(except trapezius and latissimus dorsi) |
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superficial vertebral mm move
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head and neck
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intermediate mm move
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stabilize and extend vertebral column
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deep layer moves
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connect adjacent vertebrae to each other
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extensor mm
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extend vertebral column and resist downward pull of gravity
located on back, posterior to spine |
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flexor mm
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cause flexion
vertebral flexors are lateral to vertebral column |
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mm that insert on skull have word
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capitis
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mm that insert on neck have word
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cervicis
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mm that insert on thoracic vertebrae have word
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thoracis
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mm that insert on lumbar have word
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lumborum
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superficial vertebral mm
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splenius capitis m
splenius cervicis m when both sides contract, neck is extended when one side contracts, neck is rotated laterally and flexed |
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intermediate layer mm
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erector spinae group
3 subgroups: spinalis longissimus iliocostalis |
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spinalis cervicis (intermediate layer)
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extends neck
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spinalis thoracis (intermediate layer)
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extends vertebral column
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longissimus capitis
longissimus cervicis (intermediate layers) |
act on neck
neck extends for both when one, neck is flexed and rotated laerally |
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iliocostalis cervicis
iliocostalis thoracis iliocostalis lumborum |
extend neck and vertebral column and stabilize the thoracic vertebrae
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deep layer group
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transversospinalis mm
interconnect and support vertebrae |
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do more deep layer stuff
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yes
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Spinal Flexors
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located along lateral and anterior surfaces of vertebrae
longus capitis longus colli quadratus lumborum |
