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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]
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"Bamboo hair" is a rare autosomal recessive genodermatosis characterized by congenital ichthyosiform erythroderma, trichorrhexis invaginata, and atopic diathesis with failure to thrive. Chronic skin inflammation results in scaling and exfoliation , predisposing these patients to life-threatening infections, sepsis , and dehydration .
English: A diagram showing how the cross section of the hair shaft differs in different hair types. A round cross section is found in straight hair types, an oval cross section in wavy or curly hair types, and a flattened oval cross section in curly or kinky hair types.
Hypertrichosis is an abnormal amount of hair growth over the body. [1] [2] The two distinct types of hypertrichosis are generalized hypertrichosis, which occurs over the entire body, and localized hypertrichosis, which is restricted to a certain area. [1]
Midphalangeal hair, or the presence/absence of hair on the middle phalanx of the ring finger, is one of the most widely studied markers in classical genetics of human populations. Although this polymorphism was observed at other fingers as well, for this kind of research, the fourth finger of the hand has been conventionally selected.
Bubble hair is characterized by rows of bubbles seen microscopically within localized areas of the brittle hair. [3] These air-filled spaces occur in the cortex of the hair shaft that correspond to the breakdown of keratin and local air expansion triggered by hot water passing through the shaft. [2] There may be an inherited predisposition. [4]
English: The following video shows a cross-section of the hair follicle where hair grows, hair growth from its initial phase and the basic structure of a hair. 1. Hair follicle 2. Veins 3. Arteries 4. Hair bulb 5. Follicle papilla 6. Mother cells 7. Cells (without core) 8. Cells (extended) 9. Sebum 10. Sebaceous gland 1a. Cuticle 2a. Cortex 3a ...