1where do the intrinsic back muscles originate and insert
on back
2what is the function of the intrinsic back muscles
move axial skeleton
3what innervates the intrinsic back muscles
dorsal rami
4what is the bilateral action of the intrinsic back muscles
extend vertebral column or head/neck
5where does the splenius capitis and splenius cervicis originate
spinous processes C7-T6
6where does the splenius capitus insert
mastoid process
7where does the splenius cervicis originate
transverse processes C1-3
8what is the bilateral action of the splenius capitis and splenius cervisis
extend head and neck
9what is the unilateral action of the splenius capitis and splenius cervisis
laterally flex neck, rotate head to same side
10what is the origin of he erector spinae muscles
iliac crest, sacrum, lumbar spinous processes, supraspinous ligament
11what is the insertion of the erector spinalis
spinous processes
12what is the insertion of the erector longissimus
transverse processes
13what is the insertion of the erector iliocostalis
rib angles
14what are the bilateral actions of the erector spinae muscles
extend vert column, head, neck
15what are the unilateral actions of the erector spinae muscles
laterally flex vert column to same side
16what are the three parts of the erector spinalis
capitis (very tiny), cervicis, thoracis
17what are the three parts of the erector longissimus
capitis, cervicis, thoracis
18what are the three parts of the erector iliocostalis
cervicis, thoracis, lumborum
19segmental grouping of cells in paraxial mesoderm that will split to become sclerotomes and dermomyotomes
somites
20what are the two types of dermomyotomes
dermatomes and myotomes
21mytomes divide into
epimere (dorsal mass) and hypomere (ventral mass)
22what does your epimere become
your intrinsic back muscles
23what does your hypomere become
your abdominal, intercostals,… limbs
24what is the epimere innervated by
dorsal rami
25what is the hypomere innervated by
ventral rami
26what innervates serratus posterior superior
ventral rami
27what innervates the erector iliocostalis
dorsal rami