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occipital neuralgia : ウィキペディア英語版
occipital neuralgia

Occipital neuralgia, also known as C2 neuralgia, or (rarely) Arnold's neuralgia, is a medical condition characterized by chronic pain in the upper neck, back of the head and behind the eyes. These areas correspond to the locations of the lesser and greater occipital nerves. The greater occipital nerve also has an artery that supplies blood that is wrapped around it - the occipital artery - that can contribute to the neuralgia. This condition is also sometimes characterized by diminished sensation in the affected area as well.
==Causes==
Occipital neuralgia is caused by damage to these nerves. Ways in which they can be damaged include trauma (usually concussive), physical stress on the nerve, repetitive neck contraction, flexion or extension, and as a result of medical complications (such as ''osteochondroma'', a benign tumour of the bone). Another rare but possible cause is CSF leaks. Yet another cause is from radio frequency nerve ablation. Rarely, occipital neuralgia may be a symptom of metastasis of certain cancers to the spine. There are several areas that have potential to cause injury from compression:
#The space between the vertebral bones of C1 and C2
#The atlantoaxial ligament as the dorsal ramus emerges
#The deep to superficial turn around the inferiolateral border of the obliquus capitis inferior muscle and its tight investing fascia
#The deep side of semispinalis capitis, where initial piercing can involve entrapment in either the muscle itself or surrounding fascia
#The superficial side of semispinalis capitis, where completion of nerve piercing muscle and its fascia again poses risk
#The deep side of the trapezius as the nerve enters the muscle
#The tendinous insertion of the trapezius at the superior nuchal line
#The neurovascular intertwining of the GON and the occipital artery

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「occipital neuralgia」の詳細全文を読む



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