Intermediate Layerof intrinsic Back Muscle

Question 0

Erector Spinae Origin

Answer 0

Origin:
arise by broad tendon from the posterior part of illiac crest, posterior surface of sacrum, sacroiliac ligaments, sacral and inferior lumbar spinous processes, and supraspinous ligament

Question 1

erector spinae (what composes them)

Answer 1

I LOVE SPAGHETTI
Illiocostalis- Lumaborum, Thoracis, Cervicis
Longissimus- Thoracis, Cervicis, Capitas
Spinalis- Thoracis, cervicis, capitas

Question 2

Illiocostalis (Lumborum, thoracis, cervicis) Insertion

Answer 2

Fibers run superior to angles of lower ribs and cervical transverse processes

Question 3

Longissiumus (Thoracis, Cervisis, Capitas) Insertion

Answer 3

fibers run super to ribs between tubercles and angles to transverse processes in thoracic and cervical regions and to mastoid process of temporal bone

Question 4

Spinalis (thoracis, cervicis, capitas) Insertion

Answer 4

fibers run superiorly to the spinous processes in upper thoracic region and to cranium

Question 5

Erector Spinae Innervation

Answer 5

Posterior rami of spinal nerves

Question 6

Main actions of Erector Spinae

Answer 6

Acting bilaterally- extend head and neck; as back is flexed control movement by gradually lengthening fibers
Acting Unilaterally- laterally flex vertebral column