ICHD classification and diagnosis of migraine are further subdivided. Overall ICHD-3 beta distinguishes 29 migraine subtypes. The following table outlines the main subtypes and their ICHD-1, -2, -3 beta and ICD-10 codes. Migraine without aura also referred to as a "common migraine", (previously known as "hemicrania simplex") is a specific neurological disorder characterized by recurrent, throbbing headaches that often affect one side of the head (i.e., it is unilateral), are of at least moderate intensity, and may cause nausea, phonophobia or photophobia. One defining characteristic of the common migraine is a lack of the visual disturbances known as an aura. The exact International Classification of Headache
Which Way Is East a duet recording of such unfettered communication. Highly recommended". The All About Jazz review by John Kelman stated "While Higgins' passing, at the relatively youthful age of sixty-five, was tragic, we should feel fortunate that Lloyd had the foresight to bring him to his home in January 2001, for this series of impromptu, intimate and ultimately revealing duets". Other professional reviews for the same website were also highly favourable with Mark F. Turner stating "the music is a wondrous journey on many levels. Fervently recommended" Mark Corroto stated "The last recording by Higgins is worth savoring". Which Way Is East