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20 Cards in this Set

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