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The nail wall (vallum unguis) is the cutaneous fold overlapping the sides and proximal end of the nail. The lateral margin (margo lateralis) lies beneath the nail wall on the sides of the nail, and the nail groove or fold (sulcus matricis unguis) are the cutaneous slits into which the lateral margins are embedded. [3]
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.
The lunula is located at the end of the nail that is closest to the skin of the finger, but it still lies under the nail. It is not actually white but only appears so when it is seen through the nail. Outlining the nail matrix, the lunula is a very delicate part of the nail structure. If one damages the lunula, the nail will be permanently ...
Read between the lines. Dr. Lindsey Zubritsky, a board-certified dermatologist based in Mississippi, is “begging” her 1.4 million TikTok followers to check their nails for a vertical line ...
There are several causes of Beau's lines. It is believed that there is a temporary cessation of cell division in the nail matrix.This may be caused by an infection or problem in the nail fold, where the nail begins to form, or it may be caused by an injury to that area.
The cause of pterygium inversum unguis is unknown. Congenital pterygium inversum unguis is assumed to be brought on by an early abnormality in the fetal ridge and groove formation. [5] Idiopathic forms of pterygium inversum unguis may result from the nail bed's distal expansion, which often aids in the creation of the nail plate. [6]
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 ...
Nail plate can refer to: Nail (anatomy), a keratin plate at the end of fingers and toes; Nail-header, a tool for working heads onto metal nails