Friday, September 08, 2006

Hair Whorls

When a baby's brain is developing there is a period of time when there is no bone in between the brain and the skin. During that phase of growth is also when the hair roots begin to form on the scalp--I think around 16 weeks gestational age.

So, it is believed that hair whorls (or cowlicks) are a reflection of some of the brain growth in utero. That they are from the brain expanding backwards and the hair follicles being stretched over that area.

Only 3-4% of the populations has two hair whorls and if you have more than that or if they are further away from your posterior fontanelle, then it may be a marker for developmental abnormalities.

Who knew? I thought they were just a pain for combing your hair in the morning.

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