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Goose bumps are created when tiny muscles at the base of each hair, known as arrector pili muscles, contract and pull the hair straight up. The reflex is started by the sympathetic nervous system, which is responsible for many fight-or-flight responses. The muscle cells connected to the hair follicle have been visualized by actin ...
The arrector pili muscles, also known as hair erector muscles, [1] are small muscles attached to hair follicles in mammals. Contraction of these muscles causes the hairs to stand on end, [ 2 ] known colloquially as goose bumps (piloerection).
A hair dryer (the handheld type also referred to as a blow dryer) is an electromechanical device that blows ambient air in hot or warm settings for styling or drying hair. [ 1 ] [ 2 ] Hair dryers enable better control over the shape and style of hair, by accelerating and controlling the formation of temporary hydrogen bonds within each strand.
Frictional alopecia is the loss of hair that is caused by rubbing of the hair, follicles, or skin around the follicle. [1] The most typical example of this is the loss of ankle hair among people who wear socks constantly for years. [2] The hair may not grow back even years after the source of friction has ended.
An illustration for a hot comb patent from 1920. A hot comb (also known as a straightening comb or pressing comb) is a metal comb that is used to straighten moderate or coarse hair and create a smoother hair texture. [1] A hot comb is heated and used to straighten the hair from the roots.
Straightening comb (also known as a hot comb) which applies heat to the hair. [7] Hair irons (flat iron) apply heat directly to hair. For shorter hair, a flat iron with heating plates that are around 0.5 to 1 inch wide are used. Wider hair irons are used for longer hair. Blow dryer with a comb attachment or round brush to straighten hair. Too ...
Blow Dryer Attachment: An additional tool that can be attached to a hair blow dryer to brush and dry hair at the same time. The effects of brushing will be different depending texture and whether the hair is wet or dry. Straight hair typically looks smoother when brushed. Curly hair tends to expand when brushed while dry. [citation needed]
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]