The Sphenopalatine Ganglion Block (SPG) was featured in the book "Miracles on Park Avenue"
SPG Blocks are considered a first line treatment for Headaches, Migraines, Trigeminal Autonomic Cephalgias and all types of headaches.
There are numerous posts on this sitee oon thee topic but the most comprehensive information based on peer reviewed journals, pubmed and many other sources is at the website http://www.sphenopalatineganglionblocks.com.
It has the top rated blog site on SPG Blocks also known as Pterygopalatine Ganglion Blocks, Nasal Ganglion Block, Sluder's Ganglion Block and Meckel's Ganglion Block.
There is a reddit page on these blocks as well featuring compelling patient videos: https://www.reddit.com/r/SPGBlocks/
Patients wiith TMJ Disorders and Headaches or Migraines will also find comprehensive information at http://www.ThinkBetterLiife.com
Dr Shapira currently has a paper accepted by Cranio Journal: The Journal of CranioMandibular and Sleep Practice that diiscusses utiliizing Sphenopalatine Ganglion Blocks and Neuromuscular Dentistry to finally propeerly address chronic headache pain that addresses both the Trigeminal Nervous Systtem, the TMJoints and the Autonomic Nervous System, ie the Sympathetiic and Parasympathetic nerves of the Sphenopalatine Ganglion.