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Hair shaft abnormality: This is a disorder that may be hereditary or assimilated. It is described by variations in color, length, thickness, and structure of hair. Changes in the hair shaft structure often lead to internal structural alterations to hair fibers and cuticles, which may result in fragile and unmanageable hair.
The hair shaft \textbf{hair shaft} hair shaft is a part of the hair above the surface of the skin. It is made up of dead cells that have turned into keratin and binding material, together with small amounts of water. The hair shaft is formed of three layers: the medulla, the cortex, and the cuticle.
hair + shaft. Noun [edit] hairshaft (plural hairshafts) The hard filamentous part of a hair, extending above the skin surface. Retrieved from "https://en ...
Jul 21, 2015 · The hair matrix cells give rise to 6 different types of cells that make up the different layers of the hair shaft and the inner root sheath. Inner root sheath The inner root sheath (IRS) is closely apposed to the hair shaft, and, because the sheath contains no pigment, it can easily be distinguished from the hair shaft.
Jun 12, 2023 · Described initially in 1897 by Walter Smith, monilethrix is a rare structural hair shaft disorder characterized by hair fragility and resulting in patchy dystrophic alopecia.[1] Monilethrix typically transmits in an autosomal dominant mode, and it is characterized by a regular, periodic thinning of the hair-shaft, leading to a characteristic beaded appearance of the hair. The term monilethrix ...
The hair shaft is composed of three concentric layers, namely the outer cuticle, middle cortex, and inner medulla. They differ from each other in the types of keratin filaments they possess. Cells in the hair matrix surrounding the dermal papilla are responsible for hair growth. The cuticle forms the outer surface of the hair shaft.
Oct 30, 2023 · Above the dermal papilla is the hair matrix which consists of proliferating keratinocytes. These cells proliferate and gradually move upwards where they are keratinized to produce the hair shaft. Due to the presence of the dermal papilla and hair matrix, the bulb of the hair is termed as the active site for hair growth.
