Back muscles

Question 1

Back muscle venous drainage order (6)

Answer 1

intervertebral vein, posterior intercostal and lumbar vein, inferior and superior vena cava

Question 2

intercostal vein drainage (2)

Answer 2

azygous then superior vena cava

Question 3

vertebral vein anatomy (10)

Answer 3

external vertebral plexus, internal vertebral plexus, intervertebral vein, segmental veins, anterior and posterior segmental medullary/radicular veins, posterior spinal vein, subarachnoid space, epidural/extradural space, anterior spinal vein

Question 4

ventral rami supply

Answer 4

extrinsic back muscles

Question 5

dorsal lateral rami supply (2)

Answer 5

iliocostalis and longissimus

Question 6

dorsal medial rami supply (5)

Answer 6

spinalis, transversospinalis, unisegmental, zygapophyseal joints, overlying skin