27 citations,
February 1991 Cuticle damage doesn't affect hair's tensile strength; the cortex is responsible for it.
26 citations,
November 2006 in “Pharmacology, Biochemistry and Behavior” Pregnancy reduces anxiety in rats, but finasteride reverses this effect.
25 citations,
March 2002 in “Scanning” Confocal microscopy is better than scanning electron microscopy for studying hair in its natural state and understanding hair products' effects.
16 citations,
October 1992 in “Journal of cutaneous pathology” Bubble hair deformity may be caused by hair shaft trauma and can improve with gentle hair care.
12 citations,
July 2020 in “DOAJ (DOAJ: Directory of Open Access Journals)” Men with hormonal imbalances similar to PCOS may have increased risk of metabolic and heart diseases.
9 citations,
November 2019 in “Cell calcium” The STIM1 R304W mutation in mice leads to bone changes and teeth hair growth.
7 citations,
January 2019 in “Headache” Hormone therapy may increase migraines in transgender women and decrease them in transgender men; more research is needed on migraine management in transgender individuals.
4 citations,
April 2020 in “bioRxiv (Cold Spring Harbor Laboratory)” The skin has about 230,000 touch-sensitive nerve fibers, with high concentrations in the hands and face.
2 citations,
October 2018 in “The journal of pediatrics/The Journal of pediatrics” The document concludes that specific hair and blood vessel abnormalities in infants with seizures and developmental issues may indicate Menkes disease, which lacks a cure and is often fatal by age 3.
1 citations,
September 2018 in “International journal of research - granthaalayah” Human hair medulla doesn't break down hydrogen peroxide, which may affect hair color formation.
1 citations,
July 2015 in “PubMed” Human hair's strength comes from a honeycomb-like structure and macrofibrils.
January 2023 in “Methods in molecular biology” ROP GTPase helps control the growth of pollen tubes and root hairs by managing cell structure and movement.
Yak hair stretches mainly due to macromolecules slipping past each other.
28 citations,
March 2014 in “Biological reviews/Biological reviews of the Cambridge Philosophical Society” The document concludes that hair curvature can be explained by the growth patterns caused by the shape and separation of cells in the hair follicle and is affected by specific molecular pathways.
6 citations,
March 2021 in “Frontiers in surgery” A woman's symptoms of increased body hair and testosterone were caused by a rare adrenal tumor, which was removed successfully.
4 citations,
July 2010 in “International Journal of Cosmetic Science” Curved human hair has different structures on its convex and concave sides.
April 2019 in “Journal of the Endocrine Society” A woman with Cushing's syndrome improved after surgery to remove an adrenal tumor.
April 2019 in “Journal of the Endocrine Society” A rare adrenal tumor in a woman only made DHEA-S, causing hair thinning, and was removed, fixing the hormone level.
January 1998 in “KAGAKU TO SEIBUTSU” The document suggests that male hormones likely affect hair growth and baldness, and future treatments might involve stem cells and androgen-independent cells.
1 citations,
December 2020 in “bioRxiv (Cold Spring Harbor Laboratory)” Sox9 levels in brain stem cells affect whether they stay as stem cells or become neurons.
October 2023 in “IBRO neuroscience reports” Rat hair follicle stem cells have functional oxytocin receptors, useful for studying neuropsychiatric disorders.
123 citations,
December 1997 in “Calcified Tissue International” Higher androgen levels and site-specific AR expression cause sex-related skeletal differences, and certain steroids can boost AR expression and androgen effects in bone cells.
4 citations,
February 2020 in “Cell & tissue research/Cell and tissue research” Hair follicle stem cells might help treat traumatic brain injury.
April 2023 in “Journal of Investigative Dermatology” Psoriasis patients did not show more brain atrophy or small vessel disease than controls, but longer psoriasis duration was linked to more brain atrophy.
201 citations,
November 1964 in “Journal of neurophysiology” The cuneate nucleus has two main neuron types: relay neurons and interneurons.
142 citations,
September 2020 in “Journal of neurophysiology” Young adults have about 230,000 tactile nerve fibers, decreasing 5-8% per decade with age.
11 citations,
July 2010 in “Journal of the American Academy of Orthopaedic Surgeons” PRP treatments have shown mixed results for healing, and future research should focus on how PRP is used and which type is used.
Excessive vitamin A intake caused severe health issues that mostly resolved after stopping the intake.
March 2005 in “Journal of the American Academy of Dermatology” Adding amino acids to damaged hair can improve its strength and appearance.
13 citations,
September 2008 in “PubMed” Japanese women's curved hair has an uneven internal structure and varying amino acid composition.