February 2022 in “Actas dermo-sifiliográficas/Actas dermo-sifiliográficas” Hair shaft disorders, often due to genetics or environment, lack specific treatments but can be managed with gentle hair care and may improve with age or topical treatments.
31 citations
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December 2010 in “Journal of the American Academy of Dermatology” Loose anagen hair syndrome is caused by structural abnormalities in the hair follicle's inner root sheath.
1 citations
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January 2007 in “AIP conference proceedings” High-resolution x-ray images showed three main structures in human hair: medulla, cortex, and cuticle.
11 citations
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May 2013 in “Journal of Investigative Dermatology” KRTAP10 proteins help form the hair shaft's tough outer layer by interacting with specific hair keratins.
3 citations
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March 2009 in “Hirosaki University Repository for Academic Resources (Hirosaki University)” Hirosaki hairless rats have sparse, twisted hair due to missing hair keratin genes.
30 citations
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April 2017 in “Journal of structural biology” Human hair keratin fibers have a detailed nano-scale structure that changes with different conditions.
December 2024 in “Skin Appendage Disorders” Traction alopecia reduces hair density and thickness; proper hair care can help prevent it.
January 2017 in “대한미용학회지” The cuticle layer in hair follicles thickens during keratinization due to incomplete cytosol loss.
February 2023 in “Cosmoderma” Loose anagen hair syndrome causes easily shed hair but usually improves with time.
22 citations
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January 2006 in “Journal of Structural Biology” Hair follicles form hard α-keratin filaments in four steps, showing structural differences.
A 5-year-old girl has sparse, dry, and brittle hair but is otherwise healthy.
21 citations
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July 2010 in “International Journal of Cosmetic Science” Older people's hair becomes less shiny because it gets more uneven and curved.
28 citations
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July 2000 in “PubMed” Hair structure forms the same way inside and outside the body.
Genetic factors might cause fibrosing alopecia linked to hair shaft abnormalities.
66 citations
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June 2004 in “Biophysical Journal” Hard α-keratin in hair has a unique, nonordered structure, different from other fibers.
23 citations
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December 1991 in “Annals of the New York Academy of Sciences” Balding scalps slow down hair growth.
17 citations
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June 2014 in “Journal of Ultrasound in Medicine” Abnormal cuticle and hair shaft medulla cause hair loss in androgenetic alopecia; sonography helps diagnose and manage it.
14 citations
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June 2016 in “Pediatric Dermatology” Some congenital hair disorders improve with age and can be managed with treatments like minoxidil, retinoids, supplements, and gentle hair care, but there's no cure.
20 citations
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July 2005 in “Experimental dermatology” The fuzzy gene is crucial for controlling hair growth cycles.
January 2026 in “Forum Dermatologicum” Thorough hair examination is crucial for accurate diagnosis and treatment.
November 2021 in “International journal of research - granthaalayah” The document suggests that human hair has electrical charges because of a gap in nerve cell coverage that affects electromagnetic radiation.
78 citations
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June 2003 in “Journal of the American Academy of Dermatology” Curly hair shape is determined by the hair bulb.
June 2018 in “British Journal of Dermatology” Hair cells lose their nucleus and mitochondria in a specific order as they fill with keratin, which could help develop treatments for hair issues.
September 1989 in “PubMed” The method allows detailed observation of hair tissue structures.
1 citations
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August 2016 in “Dermatology - Open Journal” Mitochondria change shape to meet energy needs during cell movement.
8 citations
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February 2016 in “The American Journal of Dermatopathology” Hair transplants can make hair follicles larger and hair shafts thicker.
October 2001 in “Dermatologic Surgery” Cutting and implanting hair follicles can create finer, more natural-looking hairlines, with about half of the implanted hairs growing back.
63 citations
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October 2011 in “Archives of Dermatology” Isolated long hairs at the original hairline can help diagnose Frontal Fibrosing Alopecia.
May 2017 in “Journal of the American Academy of Dermatology” Monilethrix is a rare, inherited condition causing fragile hair and hair loss, with no cure but some treatments may help.
September 2023 in “Cutis” A baby girl has a hair disorder called monilethrix, causing fragile hair that may improve over time.