Search results
Results from the WOW.Com Content Network
The Fischer–Saller scale, named after Eugen Fischer and Karl Saller is used in physical anthropology and medicine to determine the shades of hair color. The scale uses the following designations: A (very light blond), B to E (light blond), F to L (), M to O (dark blond), P to T (light brown to brown), U to Y (dark brown to black) and Roman numerals I to IV and V to VI (red-blond).
The phenotypic color variation observed in the epidermis and hair of mammals is primarily determined by the levels of eumelanin and pheomelanin in the examined tissue. In an average human individual, eumelanin is more abundant in tissues requiring photoprotection , such as the epidermis and the retinal pigment epithelium . [ 4 ]
Cause of greying is incompletely understood. It is a complex multi-factorial process mainly considered to be an interplay of nutritional, genetic and environmental factors. Stress causing over-activation of the sympathetic nervous system increases noradrenaline release in hair follicles .
8 Autoimmune Diseases That Cause Hair Loss. This article was reviewed by Knox Beasley, MD.. You might associate autoimmune conditions with symptoms like skin disease, chronic pain, and fatigue.
The order in which greying happens is usually: nose hair, hair on the head, beard, body hair, eyebrows. [ 2 ] [ failed verification ] Greying is a gradual process; according to a study by L'Oreal , overall, of those between 45 and 65 years old, 74% had some grey hair, covering an average of 27% of their head, and approximately 1 in 10 people ...
Canities subita, also called Marie Antoinette syndrome or Thomas More syndrome, is an alleged condition of hair turning white overnight due to stress or trauma. [1] The trivial names come from specific cases in history including that of Queen Marie Antoinette of France whose hair was noted as having turned stark white overnight after her capture following the ill-fated flight to Varennes ...
Poliosis circumscripta, commonly referred to as a "white forelock", is a condition characterized by localized patches of white hair due to a reduction or absence of melanin in hair follicles. Although traditionally associated with the scalp, poliosis can affect any hairy area on the body, including eyebrows, eyelashes, and beards.
Whereas Titian hair is a brownish shade of red hair, auburn hair is specifically defined as including the actual color red. Most definitions of Titian hair describe it as a brownish-orange color, [1] [2] but some describe it as being reddish. [3] This is in reference to red hair itself, not the color red.