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 Dr. Lee is the founder and owner of Regrowth LLC, a company based in Los Angeles and dedicated to the treatment of hair loss. He has been developing innovative products and treating hair loss sufferers for the past 16 years. Dr. Lee is the creator of the Xandrox line of hair loss treatments.
Important Note: Due a busy schedule, Dr. Lee cannot answer any new questions at this time; however, he will be providing high quality answers to questions he receives from his own practice exclusively to Morphollica.com regularly
anonymous
2005-07-07
arrector pili muscle
What is the arrector pili muscle?
The arrector pili muscle is a microscopic band of striated muscle
tissue connecting the hair follicle to the dermis. When the arrector
pili muscle is stimulated, usually due to cold or fright, it contracts
and causes the hair to ‘stand on end’, i.e. become more perpendicular to
the skin surface, forming ‘goose pimples’. Unlike the hair, which is ectodermal in origin, the arrector pili muscle
is a true dermal structure, deriving from embryonic mesoderm. Hair
follicles in the scalp are grouped, forming well-defined anatomic
structures known as follicular units, which are composed of several
terminal hairs, the associated sebaceous glands and the arrector pili
muscles. Recognition of these follicular units have allowed for
successful and esthetically pleasing, 'natural-looking' hair
transplants. Richard Lee, M.D.
Regrowth, LLC
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