erector spinae runs from
sacrum to skull longitudinally
what does erector spinae group do
extends the vertebral column
most lateral division of es
iliocostalis muscles
where is longissimus muscle group
lies intermediate
where is spinalis muscle group
closest to midline and is the least well developed
what are the longissimus and iliocostalis
large bundles of musculature with numerous slips of origin and insertion
what innervatews the erector spinae
dorsal rami of spinal nerves