Anatomy

Question 1

What are the lumbar para spinal muscles?

Answer 1

Multifidus. Erector Spinae. Quadratus Lumborum. Psoas.

https://images.app.goo.gl/u5mRtmd8cqu5p7N39.

Question 2

What are the medial lateral angulations for thoracic pedicel screw placement?

Answer 2

Doug says:
T1-3 Different.
T12 Different.

T11 either T12 like or T10 like.

T4 to 10 ~15 degrees.

Question 3

What are the landmarks for thoracic pedicle screw entry?

Answer 3

Confluence of TP, Para and Superior Articulating Process.

Within confluence optimal starting point varies by level:

https://musculoskeletalkey.com/40-posterior-spinal-instrumentation-and-fusion-using-pedicle-screws/

Question 4

What are the optimal starting points for thoracic pedical screws?

Answer 4

Within the confluence of TP, SAP and Pars:

Question 5

What is the entry point for lumbar pedical screw?

Answer 5

Question 6

What is the anatomical entry point for the Thoracic pedical screw?

Answer 6

Intersection of mid TP and lateral border of SAP.

Question 7

You are intending to operate on a L4/5 disc. What level is this at?

Answer 7

Key thing is that the Swedish is vertical underneath the laminae, pointing therefore at the correct disc space.

It’s at the correct level

Question 8

Describe the relationship of the lumbar DRG, to the foramen.

Answer 8

The DRG sits in line with the pedicle, ie the foramen, extending extra formami.

Question 9

What is the relationship of the lumbar DRG to the foramen?

Answer 9

See image.

Question 10

What is the anatomy of the sympathetic chain / DRG interaction?

Answer 10

See image.

Describe
Ventral and Dorsal Rami
Spinal Nerve
Sympathetic Ganglion
Grey Ramus
DRG
Ventral and Dorsal Root