Facts on File Encyclopedia of Health and Medicine

T–U tattoos A form of body art in which decorative inks injected into the dermis permanently stain the SKIN. Though the needles ...

tinea A common fungal INFECTIONof the SKIN, involving the layers (including the hair and nails) that are cornified (composed of ...

tinea versicolor is not contagious. The FUNGUS responsible, Malassezia furfur, is normally present on the skin (NORMAL FLORA). D ...

the IMMUNE RESPONSEdraws from the cells of the skin. They itch, often intensely (PRURITUS), and may appear and recede in various ...

V vesicle A small, blisterlike LESIONon the SKINthat contains serous fluid. Vesicles typically occur in clusters and indicate IN ...

an option for small areas of depigmentation, though are expensive and entail numerous risks. Cosmetics to cover depigmented area ...

W–X wart A growth, typically rough and raised, that appears on the SKIN. The HUMAN PAPILLOMAVIRUS (HPV), which has numerous stra ...

hives). Wheals associated with urticaria typically itch, sometimes intensely. Wheals usually do not rupture or tear, and gradual ...

limit sun exposure, and wear protective cloth- ing and sunscreen when outdoors stop smoking and avoid exposure to environ- ment ...

Conditions involving the nervous system often directly involve other body systems as well. Entries for neuromuscular disorders a ...

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tional divisions, the nervous system operates so efficiently that most of the time its myriad activi- ties take place virtually ...

The spinal cord, the body’s largest nerve, is the thoroughfare of communication between the brain and the body. It extends from ...

because only so many ions can be inside the cell body, sodium ions leave. To restore itself to nega- tive polarity the cell body ...

percent of spinal cord injuries occur in people who are between the ages of 15 and 30. Many of these ACCIDENTAL INJURIESare prev ...

The Nervous System 219 There is great hope that such discoveries will lead to effective treatments for these and other degen- er ...

A aging, neurologic changes that occur with A rudimentary NERVOUS SYSTEM is among the first structures to form as a new life beg ...

final stage of functional organization of the brain’s processes and mechanisms. The numbers of neu- roreceptors on the surfaces ...

People with one allele pairing appear less likely to develop the disease, and those with other allele pairings seem more likely. ...