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Median nail dystrophy, also known as dystrophia unguis mediana canaliformis, median canaliform dystrophy of Heller, [1]: 657 and solenonychia consists of longitudinal splitting or canal formation in the midline of the nail, a split which often resembles a fir tree, occurring at the cuticle and proceeding outward as the nail grows.
The hyponychium (IPA: / ˌ h aɪ p oʊ ˈ n ɪ k i ə m /) [1] [2] is the area of epithelium, particularly the thickened portion, underlying the free edge of the nail plate on the nail. Its proximal border is immediately distal to distal limit of nail bed—a.k.a. the onychodermal band (the line along the interface of the nail bed and the nail ...
In human anatomy, the eponychium is the thickened layer of skin at the base of the fingernails and toenails. [1] It can also be called the medial or proximal nail fold. The eponychium differs from the cuticle; the eponychium comprises live skin cells whilst the cuticle is dead skin cells.
Nails are a distinguishing feature of the primate order. The nail is an unguis, meaning a keratin structure at the end of a digit. Other examples of ungues include the claw, hoof, and talon. The nails of primates and the hooves of running mammals evolved from the claws of earlier animals. [38]
The accessory nail of the fifth toe, also known as a double nail of the fifth toe (DNFT) [1] or a petaloid toenail, [2] is a physical trait of the small toe, where a minuscule sixth toenail is present in the outer corner of the nail situated on the smallest toe. Although understudied and underreported, its prevalence is common.
A longitudinal melanonychia, for example, is a brown or black vertical nail streak that’s typically benign. “It’s more likely that you have the benign streak. It’s a lighter streak.
Related: Dog Mom's Epic Trick for Clipping Her Pup's Nails Is Pure Genius Tips for Nail Trims We all think of Rottweilers as tough dogs , but when it comes to getting their nails clipped, they ...
Also narrow. A land or water passage that is confined or restricted by its narrow breadth, often a strait or a water gap. nation A stable community of people formed on the basis of a common geographic territory, language, economy, ethnicity, or psychological make-up as manifested in a common culture. national mapping agency A governmental agency which manages, produces, and publishes ...