Catagen
Catagen (pronounced: /ˈkætədʒən/) is the transitional phase of the hair growth cycle that follows the anagen phase. It is a short-lived phase, typically lasting around two to three weeks.
Etymology
The term "catagen" is derived from the Greek words "kata," meaning "down," and "genesis," meaning "origin." It was first used in the context of hair growth in the mid-20th century.
Overview
During the catagen phase, the hair follicle shrinks and detaches from the dermal papilla. This process is also known as "clubbing," due to the club-like appearance of the hair root. The hair strand itself does not grow during this phase, but it remains anchored in the follicle.
Related Terms
- Anagen: The active growth phase of hair follicles.
- Telogen: The resting phase of the hair growth cycle.
- Hair follicle: The part of the skin that grows hair by packing old cells together.
- Dermal papilla: A small, nipple-like extension of the dermis into the hair follicle.
See Also
External links
- Medical encyclopedia article on Catagen
- Wikipedia's article - Catagen
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