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This study reports that scalp biopsies in white adults usually have 16.5 hair follicles, primarily in the anagen phase, with male samples showing fewer follicular units but more fibrous tracts in certain areas.

This study describes a modified reduction-osmication method for staining human scalp hair that improves reagent penetration and visualization of hair cortex features using transmission electron microscopy.

This study found that applying a cosmetic active ingredient improved the Young's modulus of chemically damaged human hair fibers, suggesting enhanced mechanical properties compared to untreated fibers.

This study found that somatic mosaic mutations in the doublecortin gene may cause subcortical band heterotopia in male patients, and molecular analysis using hair roots is a useful detection method.

In this study, adrenalectomy in black rats on a vitamin B-deficient diet restored hair growth and melanin deposition, effects reversed using adrenal cortical hormones.

In this study, researchers mapped cysteine accessibility in wool keratins and KAPs, revealing that certain cysteines in keratin end domains and Types I and II rod domains are accessible and likely involved in forming disulfide bonds.

This study provides insight into the specific disulfide bond interactions between keratins and keratin associated proteins, suggesting non-random cysteine interactions crucial for stabilizing hair fiber structure.

This study found that androgen impacted glucocorticoid signaling in the mouse brain only in the prefrontal cortex and substantia nigra, suggesting limited interaction between these hormones at high corticosterone levels.

In this study, researchers developed an enhanced rodent model of trigeminal neuralgia, demonstrating that structural and functional changes in the anterior cingulate cortex are linked to chronic pain and emotional disturbances, and chemogenetic inhibition of specific neurons could alleviate symptoms.

In this study, researchers observed that reproductive experience in female rats altered fear memory and medial prefrontal cortex (mPFC) activity, with pregnant and parous rats showing impaired fear recall compared to nulliparous controls, highlighting the influence of pregnancy-related neurosteroids on cognitive function and brain activity.

This study found that high-fructose intake in rats led to significant kidney histological changes, such as podocyte damage and inflammatory responses, which persisted even after returning to a standard diet.

This study identified genetic, biological, and technical factors that influence circRNA expression in the human brain, connecting these factors to potential genetic risk for diseases like schizophrenia and type II diabetes.

This study demonstrated that ablation of individual somatostatin-expressing interneurons increased activity in nearby neurons of the mouse motor cortex during motor learning.

A score of 6 or less is recommended to diagnose hirsutism in Colombian women.

This study found that UV radiation exposure during a simulated Brazilian summer caused more significant mechanical damage to natural hair than bleaching, although both caused comparable structural alterations, with double bleaching leading to the most severe protein degradation.

This study found that glyoxylic acid caused more protein loss in hair compared to traditional alkaline straighteners, though both types of treatments showed comparable effects on hair tensile strength.

This research found that Dlx3 plays a central role in hair formation and regeneration, with its absence leading to alopecia through disrupted differentiation and signaling pathways.

This study found that β-catenin signaling increases in newly born glial cells in the cortex after traumatic brain injury in mice, suggesting potential targets for enhancing recovery through the Wnt/β-catenin pathway.

Hair differentiation starts earlier than thought, involving multiple type-II keratins.

This study found that rhodamine B penetrated human hair fibers more effectively from an aqueous solution compared to a methanol/ethanol solvent, with penetration depending on hair morphology.

In this study, chemical treatments during permanent hair straightening were found to randomize proteins in the cortex, aiding in the reconnection of disulfide bonds during oxidation.

Human hair's ability to get wet is complex and can change with treatments, damage, and environment.

This study details how very long human hair naturally ages, showing cuticle wear and internal fiber changes that may inform new hair care product designs.

mHa2 and mHa3 keratins have different structures and roles in mouse hair and tongue tissues.

This study found that the moisture content of human hair significantly influences the type of fracture under tensile loading, with low or high humidity levels leading to smooth fractures and intermediate humidity resulting in step fractures.

This study identified two types of calcium in human scalp hair, with one type highly variable between individuals, potentially impacting the analysis of environmental and medical factors related to hair calcium.

In this study, researchers observed that cosmetic peroxide bleaching causes oxidative damage and protein loss in human hair, not only affecting the cuticle but also deeper cortical structures, correlating with bleaching severity.

This study found that higher melanin concentration in black hair offers photoprotection against sunlight-induced protein damage in the cortex, whereas the cuticle experiences similar photodamage regardless of hair pigmentation.

This study found that extensive cuticle damage from diperisophthalic acid oxidation did not alter the tensile properties of human hair, suggesting that these properties are mainly due to the cortex rather than the cuticle.