I am going to go thru this excellent review paper and add my personal opinions based on almost 40 years of help patients with chronic pain. MY COMMENTS WILL BE IN ALL CAPITAL LETTERS: THE ORIGINAL ARTICLE IS AVAILABLE ONLINE. The Pterygopalatine Ganglion and its Role in Various Pain Syndromes: From Anatomy to Clinical Practice. Maria Piagkou, MD, MSc, PhD*; …