Fig. 1
From: Familial neuralgia of occipital and intermedius nerves in a Chinese family
Pedigree of occipital and nervus intermedius neuralgia. Squares represent males; cycles females. Filled symbols indicate individuals with occipital neuralgia; open symbols, unaffected status; symbols with arrows point to individuals with neuralgia of nervus intermedius. The index patient is underlined. I–IV indicate the generations from the first to the fourth. Ages of the third and the fourth generations: III.1 32 years, III.2 37 years, III.3 35 years, III.4 30 years, III.5 26 years, III.6 26 years, IV.1 5 years, IV.2 8 years, IV.3 5 years