Singapore Med J
January 2012
A variation in the course of the thoracic duct was found in the cervical portion of a male cadaver during routine dissection of the head and neck region for undergraduate students. The thoracic duct, while arching laterally above the clavicle, was coursing posterior to the vertebral vein but anterior to the vertebral artery; it normally passes anterior to both the vertebral vein and artery. To the best of our knowledge, this variation in relation to the vertebral vein has not yet been reported.
View Article and Find Full Text PDFSurg Radiol Anat
February 2004
Morphologically diverse osseous projections were observed on the anterior lip of the sigmoid sulcus in a study conducted on 318 dry unsexed adult human skulls belonging to the Indian race. For convenience of description, this lip was divided into a longer lateral part, a shorter medial part and a junctional angular part having bony attributes characterized into three types, crests (42.9%), plates (22.
View Article and Find Full Text PDFJ Histochem Cytochem
September 1989
We studied the distribution pattern of serotonin-like immunoreactive nerve fibers in the major cerebral vessels of rabbit by an indirect immunofluorescence technique using whole-mount stretch preparations. The density of serotonin-like immunoreactive nerve fibers was greater in vessels of the posterior part of the circle of Willis compared with that in the anterior part. This is in contrast to most of the observations reported previously regarding adrenergic, cholinergic, and peptidergic innervation of the circle of Willis.
View Article and Find Full Text PDFThe effects of oestrogen and progesterone on noradrenergic nerves and nerves with serotonin (5-HT)-like immunoreactivity in the basilar artery were investigated in the rabbit using whole-mount stretch preparations. The noradrenergic nerves were demonstrated by glyoxylic acid fluorescence histochemistry and nerves with 5-HT-like immunoreactivity by indirect immunofluorescence techniques. Quantitative image analysis of fluorescent nerve fibres revealed that nerve density and varicosity diameter of nerves with 5-HT-like immunoreactivity were significantly (P less than 0.
View Article and Find Full Text PDFThe development of noradrenergic and peptide-containing perivascular nerves in common carotid, mesenteric, renal and femoral arteries of the guinea-pig was studied using the glyoxylic acid fluorescence and indirect immunofluorescence techniques on whole-mount stretch preparations at 6 stages between 6 weeks in utero and two years after birth. The noradrenergic plexus was more dense than the peptide-containing nerve plexuses in all the blood vessels, and, in general, calcitonin gene-related peptide-containing nerves were more numerous than substance P-containing nerves which in turn were more numerous than vasoactive intestinal polypeptide-containing nerves. In mesenteric and carotid arteries, noradrenergic nerve density reached a peak at about 4 weeks after birth that was maintained to old age, whereas the peptide-containing vasoactive intestinal polypeptide (VIP) and calcitonin gene-related peptide (CGRP) nerve plexuses reached a peak at birth and declined thereafter to about half maximum density in old age.
View Article and Find Full Text PDF1. Differences in muscle and bone weight in the right and left forelimbs have been studied in twelve Rhesus monkeys. 2.
View Article and Find Full Text PDFThe distribution of argentaffin and argyrophile cells has been studied in the small intestine of six rabbits. The conclusions are as follows: 1. The density of argentaffin and argyrophile cells is variable over the length of the small intestine.
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