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There are many structures that make up the hair follicle. Anatomically, the triad of hair follicle, sebaceous gland and arrector pili muscle make up the pilosebaceous unit. [1] A hair follicle consists of : The papilla is a large structure at the base of the hair follicle. [4] The papilla is made up mainly of connective tissue and a capillary ...
Trichoscopy is a method of hair and scalp evaluation and is used for diagnosing hair and scalp diseases. [1] The method is based on dermoscopy. In trichoscopy hair and scalp structures may be visualized at many-fold magnification. Currently magnifications ranging from 10-fold to 70-fold are most popular in research and clinical practice. [2]
In the case of male pattern hair loss, in susceptible men, a hormone called dihydrotestosterone (or DHT), which is a derivative of testosterone, causes hair follicles to undergo a process called ...
Traction alopecia is a type of alopecia or hair loss caused by a chronic pulling force being applied to the hair. [1] It commonly results from a person frequently wearing their hair in a particularly tight ponytail, pigtails, or braids with increased likelihood when hair is chemically relaxed as this compromises the hair shaft's tensile strength resulting in hair breakage.
Hair-follicle cycling Hair grows at different speeds and different lengths. Its composition causes different colors and textures, which influence how long the hair strands grow. Marianne Ernst, a German "long hair model" The three stages of hair growth are the anagen, catagen, and telogen phases. Each strand of hair on the human body is at its ...
Pili multigemini, also known as "compound hairs," [2] is a malformation characterized by the presence of bifurcated or multiple divided hair matrices and papillae, giving rise to the formation of multiple hair shafts within the individual follicles. [3] [4]
Pattern hair loss (also known as androgenetic alopecia (AGA) [1]) is a hair loss condition that primarily affects the top and front of the scalp. [2] [3] In male-pattern hair loss (MPHL), the hair loss typically presents itself as either a receding front hairline, loss of hair on the crown and vertex of the scalp, or a combination of both.
Uncombable hair syndrome (UHS) is a rare structural anomaly of the hair with a variable degree of effect. It is characterized by hair that is silvery, dry, frizzy, wiry, and impossible to comb. [4] It was first reported in the early 20th century. [5] It typically becomes apparent between the ages of 3 months and 12 years. [6]