Curly Hair Follicle Is Sculpted by a Contracted Arrector Pili Muscle: A Hypothesis with Treatment Implications

January 2024 in “ Indian Journal of Pharmaceutical Sciences ”

Nedaa Al Jasim

Arrector Pili Muscle curly hair coily hair outer root sheath smooth muscle relaxants

TLDR Relaxing the Arrector Pili Muscle might make curly hair straighter.

The article hypothesizes that the contraction of the Arrector Pili Muscle (APM) in hair follicles is responsible for creating curly or coily hair by curving the outer root sheath. It suggests that smooth muscle relaxants could potentially be used to relax curly hair by modulating APM contraction. The study calls for further research, including AI studies, to confirm the APM's role in hair curl patterns and to explore treatment options. The hypothesis is supported by observations of the APM's anatomical and functional characteristics.

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