Development of the myelin sheath of the hypogastric nerves in a human foetus aged 23 weeks.
The formation of the myelin sheath of the human hypogastric nerves was studied by electron microscopy in a foetus of 23 weeks of postovulatory age (220 mm C-R length). In the investigated foetus the hypogastric nerves were mainly composed of bundles of unmyelinated fibres. The myelinated fibres were seen to be at different stages of myelination. Well myelinated fibres had thick compact laminated myelin. The number of myelin lamellae on a single fibre was 22.
Department of Anatomy, University School of Medical Sciences, Poznań, Poland. mbruska@usoms.poznan.pl
Małgorzata
M
Bruska
Adam
A
Piotrowski
D005333:Fetus; D005865:Gestational Age; D006801:Humans; D007001:Hypogastric Plexus / Q000196:embryology* / Q000648:ultrastructure; D009186:Myelin Sheath / Q000502:physiology / Q000648:ultrastructure; D009413:Nerve Fibers, Myelinated / Q000502:physiology / Q000648:ultrastructure