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GlossaryHair Cross-Section

shape and structure of a hair strand's cut end

Hair cross-section refers to the shape and structure of a hair strand when it is cut perpendicular to its length. This cross-sectional shape can be round, oval, or flat, and it influences the hair's texture and curl pattern. For example, round cross-sections are typically associated with straight hair, while oval or flat cross-sections are linked to wavy or curly hair. Understanding hair cross-sections is important for professionals in dermatology and cosmetology as it helps in diagnosing hair conditions and tailoring hair care treatments.

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research Clinico-mycological profile and trichoscopic findings among pediatric tinea capitis patients: A cross-sectional study from northern India (Haryana)

1 citations , October 2022 in “Asian journal of medical sciences”

Trichoscopy is a valuable, quick, and non-invasive tool for diagnosing tinea capitis in children.

research A Microscopic Study of the Hair of the Rabbit, with Special Reference to its Form of Cross-section and Granular Pigmentation

January 1957 in “Nihon Chikusan Gakkaiho”

Rabbit hair color is influenced by the shape and distribution of pigment granules.

research Variation in human hair ultrastructure among three biogeographic populations

28 citations , November 2018 in “Journal of structural biology”

Different populations have distinct hair structures related to their ancestry.

research Human hair form. Morphology revealed by light and scanning electron microscopy and computer aided three-dimensional reconstruction.

27 citations , September 1988 in “PubMed”

Hair follicle shape determines hair type: curly, straight, or in-between.

research Optical coherence tomography examination of hair

September 2014 in “Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE”

OCT can effectively examine and reveal details about human hair and scalp conditions.

Acquired Uncombable Hair Syndrome in a 39-Year-Old Woman

research Acquired Uncombable Hair

6 citations , August 1993 in “Archives of Dermatology”

A woman's hair changed to a dry, tangled texture that's hard to comb after treatment with spironolactone, suggesting the medication might cause such hair changes.

How Different Is Human Hair? A Critical Appraisal of Global Hair Fibre Characteristics and Properties Towards Defining a More Relevant Framework for Hair Type Classification

research How different is human hair? A critical appraisal of the reported differences in global hair fibre characteristics and properties towards defining a more relevant framework for hair type classification

8 citations , November 2022 in “International Journal of Cosmetic Science”

Human hair varies widely and should be classified by curl type rather than race.

research High-throughput phenotyping methods for quantifying hair fiber morphology

4 citations , June 2021 in “Scientific Reports”

Hair fiber shape and curvature are not significantly linked when ancestry is considered.

research Studies of light scattering from ethnic hair fibers

7 citations , July 2004 in “International Journal of Cosmetic Science”

Different hair types from various ethnic groups affect hair shine due to characteristics like thickness and shape.

research Human hair keratin network and curvature

85 citations , October 2007 in “International Journal of Dermatology”

Curly hair shape is due to uneven growth patterns in the hair follicle.

research Optical Coherent Tomography for in vivo Determination of Changes in Hair Cross Section and Diameter during Treatment with Glucocorticosteroids – A Simple Method to Screen for Doping Substances?

23 citations , January 2008 in “Skin Pharmacology and Physiology”

Optical coherent tomography can effectively detect steroid use by analyzing hair changes.

research High-throughput phenotyping methods for quantifying hair fiber morphology

1 citations , November 2020 in “bioRxiv (Cold Spring Harbor Laboratory)”

Quantifying hair shape is better than using racial categories for understanding hair characteristics.

research In-Situ Tensile Testing of Hair Fibers in An Environmental Scanning Electron Microscope (ESEM)

August 2007 in “Microscopy and Microanalysis”

Hair fibers break by cuticle cell slipping, shape changing, cuticle fraying, and surface cracking when stretched under specific conditions.

research Hair cross-sectioning in uncombable hair syndrome: An easy tool for complex diagnosis

7 citations , June 2018 in “Journal of the American Academy of Dermatology”

The document suggests finding a simpler, cheaper way to diagnose Uncombable Hair Syndrome.

Priorities for Efficacy Trials of Gender-Affirming Hormone Therapy With Estrogen: Collaborative Design and Results of a Community Survey

research Priorities for efficacy trials of gender-affirming hormone therapy with estrogen: collaborative design and results of a community survey

February 2024 in “Hormones”

Future hormone therapy trials should match the diverse needs and priorities of the gender-diverse community.

research Physical characterization of the hair of Mexican women

6 citations , December 2018 in “International Journal of Cosmetic Science”

Mexican women's hair is between Asian and Caucasian hair in thickness and shape, with varied strength and some damage.

Frequency of Different Patterns of Hair Loss in Pakistani Men Using BASP Classification

research Frequency of Different Pattern of Hair Loss in Pakistani Men Using BASP Classification

May 2021 in “Pakistan Journal of Medical and Health Sciences”

M type hair loss is the most common in Pakistani men.

research Uncombable hair syndrome: Observations on response to biotin and occurrence in siblings with ectodermal dysplasia

101 citations , July 1985 in “Journal of the American Academy of Dermatology”

Biotin improved hair growth and combability in one child with uncombable hair syndrome.

research Divergent genetic mechanism leads to spiny hair in rodents

February 2018 in “bioRxiv (Cold Spring Harbor Laboratory)”

Rodent spiny hair traits are due to genetic factors other than the Edar gene.

research 712 Using scanning electron microscopy to elucidate the role of hair shaft malformation in the pathogenesis of Central Centrifugal Cicatricial Alopecia

June 2020 in “Journal of Investigative Dermatology”

Hair shaft malformation contributes to Central Centrifugal Cicatricial Alopecia.

research Microstructure of Defective Mink Guard Hair

2 citations , March 1977 in “Journal of animal science/Journal of animal science ... and ASAS reference compendium”

Defective mink guard hairs have split tips and missing cuticle cells, causing a metallic sheen.

research Uncombable hair syndrome: A case presentation

February 2013 in “Journal of the American Academy of Dermatology”

Uncombable hair syndrome causes dry, frizzy hair that can't be combed flat, seen in a young child.

research Acquired progressive kinking of the hair in a Korean female adolescent

1 citations , October 2012 in “The Journal of Dermatology”

A Korean girl developed kinky hair without known cause or effective treatment.

research The COVID-19 Sequelae: A Cross-Sectional Evaluation of Post-recovery Symptoms and the Need for Rehabilitation of COVID-19 Survivors

80 citations , February 2021 in “Cureus”

Many COVID-19 survivors continue to experience symptoms like fatigue and concentration problems after recovery, possibly needing rehabilitation.

research The Cross-section Trichometer: A New Device for Measuring Hair Quantity, Hair Loss, and Hair Growth

29 citations , March 2008 in “Dermatologic Surgery”

The Cross-section Trichometer is a new tool that can measure hair quantity and detect hair loss and growth.

research Cross-Sectional Study of Hairline Shape among the Idoma People of Benue State, Nigeria

February 2023 in “EAS Journal of Medicine and Surgery”

Most Idoma people have a curved hairline due to genetics.

research Seventy‐MHz Ultrasound Detection of Early Signs Linked to the Severity, Patterns of Keratin Fragmentation, and Mechanisms of Generation of Collections and Tunnels in Hidradenitis Suppurativa

41 citations , November 2019 in “Journal of Ultrasound in Medicine”

Ultrasound can help detect early signs and severity of hidradenitis suppurativa.

Physiological Changes in Scalp, Facial, and Body Hair After Menopause: A Cross-Sectional Population-Based Study of Subjective Changes

research Physiological changes in scalp, facial and body hair after the menopause: a cross-sectional population-based study of subjective changes

10 citations , December 2010 in “British Journal of Dermatology”

After menopause, some women lose scalp hair and gain facial hair, with patterns suggesting different underlying causes.

research Pili trianguli et canaliculi as a phenotypic subtype in patients with central centrifugal cicatricial alopecia: A scanning electron microscopy study

2 citations , May 2020 in “Journal of the American Academy of Dermatology”

Hair shaft changes may be linked to CCCA, but their role is unclear.

The Cross-Section Trichometer: A Device for Measuring Hair Quantity, Loss, and Growth

research The Cross-section Trichometer

2 citations , July 2008 in “Dermatologic Surgery”

The Cross-section Trichometer is a promising tool for measuring hair characteristics without cutting the hair and may have various clinical uses.