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      Novel mechanism of human fetal growth regulation: A potential role of lanugo, vernix caseosa and a second tactile system of unmyelinated low-threshold C-afferents

      Medical Hypotheses
      Elsevier BV

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          Abstract

          Novel hypothesis of human fetal growth regulation in amniotic fluid environment integrates lanugo, vernix caseosa and a second tactile system of unmyelinated low-threshold C-afferents - all three forming a unique natural instrument powerfully speeding fetal growth during mid-gestation and lowering its tempo at the end of gestation. Repeated oscillations of lanugo hairs encased by vernix caseosa during fetal movements in amniotic fluid activate highly sensitive mechanoreceptors connected to unmyelinated C-afferents, which prime function is to conduct originated impulses from all fetal skin dermatoms via spinal cord and to activate vagal sensory zone, hypothalamus and insular cortex, for concomitant promotion of the anti-stress effect through oxytocin release, and stimulation of fetal growth by the incretin effect of gastrointestinal hormones.

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          Author and article information

          Journal
          Medical Hypotheses
          Medical Hypotheses
          Elsevier BV
          03069877
          February 2009
          February 2009
          : 72
          : 2
          : 143-146
          Article
          10.1016/j.mehy.2008.09.033
          19004563
          dfde4dc9-6547-4aba-ac59-1f816bd50756
          © 2009

          https://www.elsevier.com/tdm/userlicense/1.0/


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