E-mail: moc. Herpes zoster is a neurocutaneous viral infection caused by Varicella zoster virus. It is characterized by unilateral radicular pain and vesicular eruptions limited to a single dermatome innervated by a single spinal or cranial sensory ganglion. A year-old male with no pre-morbid illness presented with the multiple fluid filled lesions over the left half of the face for 3 days. The lesions began in the left upper lip and progressed within a span of 3 days to involve entire left half of the face. He also had a burning sensation and pain over the lesions.
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Anatomy: Dermatomes of the Face Image
PHN , Shingles. Shingles on the face and scalp present a special problem as the Trigeminal nerve root ganglia are housed inside the skull. It is in these ganglion or nerve roots that the Varicella Zoster Virus which causes chicken pox live , after the chicken pox has resolved. The chart below illustrates shingles dermatome of the face and head representing the possible patterns of distribution of shingles disease. Should you develop postherpetic neuralgia pain often referred to as PHN of the face and scalp, I recommend not only treating the area of your skin where the pain is , but extending the treatment to your temple, behind your ear and the base of the skull and upper neck on the affected side. You see, often the pain of Post Herpetic Neuralgia PHN is caused by a chronic, low grade infection present in your nerves.
The trigeminal nerve the fifth cranial nerve , or simply CN V is a nerve responsible for sensation in the face and motor functions such as biting and chewing; it is the largest of the cranial nerves. The ophthalmic and maxillary nerves are purely sensory, whereas the mandibular nerve supplies motor as well as sensory or "cutaneous" functions. The motor division of the trigeminal nerve derives from the basal plate of the embryonic pons , and the sensory division originates in the cranial neural crest. Sensory information from the face and body is processed by parallel pathways in the central nervous system. The three major branches of the trigeminal nerve—the ophthalmic nerve V 1 , the maxillary nerve V 2 and the mandibular nerve V 3 —converge on the trigeminal ganglion also called the semilunar ganglion or gasserian ganglion , located within Meckel's cave and containing the cell bodies of incoming sensory-nerve fibers.
NCBI Bookshelf. Patrick A. Whitman ; Oluwaseun O. Authors Patrick A. Whitman 1 ; Oluwaseun O.