Nerve fibres in the uterine artery increase in number in pregnant guinea-pigs

PERIVASCULAR nerves of the uterine artery were studied in four-month-old pregnant and non-pregnant guinea-pigs. In pregnancy, the uterine artery hypertrophies (more than two-fold growth in diameter and length and 50% increase in wall thickness), but its density of innervation remains high, because o...

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Veröffentlicht in:Neuroreport 1991-09, Vol.2 (9), p.537-540
Hauptverfasser: Mione, Maria Caterina, Gabella, Giorgio
Format: Artikel
Sprache:eng
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Zusammenfassung:PERIVASCULAR nerves of the uterine artery were studied in four-month-old pregnant and non-pregnant guinea-pigs. In pregnancy, the uterine artery hypertrophies (more than two-fold growth in diameter and length and 50% increase in wall thickness), but its density of innervation remains high, because of the growth of many new axons. The axons in a complete transverse section of the vessel increase by 40%. The nerve bundles grow by 100%. Small nerve bundles increase more than large bundlesnearly 70% of the nerve bundles contain 10 or fewer axons in pregnant guinea-pigs (37% in non-pregnant animals). The increase in axon number is accompanied by formation of new varicosities, hence presumably of new neuromuscular junctions.
ISSN:0959-4965
1473-558X
DOI:10.1097/00001756-199109000-00010