research Intrinsic curvature in wool fibres is determined by the relative length of orthocortical and paracortical cells 27 citations , March 2018 in “Journal of Experimental Biology” Wool fibre curvature is due to longer orthocortical cells compared to paracortical cells.
research Cortical cell types and intermediate filament arrangements correlate with fiber curvature in Japanese human hair 62 citations , December 2008 in “Journal of structural biology” Hair curvature in Japanese people is linked to specific cell types and filament arrangements in the hair cortex.
research Curl secret in cells March 2018 in “Journal of Experimental Biology” Hair curliness is caused by the arrangement and length of two different cell types.
research Sequence and expression of human hair keratin genes 19 citations , July 1994 in “Journal of Dermatological Science” Human hair keratin genes are similar to mouse genes and are specifically expressed in hair follicles.
research Investigation of aging effects in human hair using atomic force microscopy 20 citations , July 2010 in “Skin Research and Technology” Aging makes hair thinner and rougher, with less clear edges.