Distribution and morphological characterization of viscerofugal projections from the large intestine to the inferior mesenteric and pelvic XXXX of the male @entity35 .

@entity35 @entity21 @entity530 @entity4494
Viscerofugal neurons are enteric neurons in the myenteric plexus of the stomach and intestine that project to the prevertebral @entity21 as the afferent limb of intestino-intestinal reflexes. This study characterizes viscerofugal projections to the inferior @entity4494 and investigates the possibility of similar projections to the major pelvic @entity21 in the male @entity35 . The colon and rectum were examined for retrogradely labelled neurons following the injection of retrograde tracer into the inferior mesenteric or major pelvic @entity21 , or following the application of tracer to the caudal end of the cut intermesenteric nerves, or either end of the cut hypogastric nerves. All labelled viscerofugal neurons were found in the myenteric plexus and were often grouped near the mesenteric attachment. The number of viscerofugal neurons projecting to the inferior @entity4494 via the lumbar colonic nerves increases along the length of the large intestine with the maximum number of viscerofugal neurons found in the rectum. Some viscerofugal neurons from the distal colon and rectum reach the inferior @entity4494 . A similar number and distribution of viscerofugal neurons project via the inferior @entity4494 into the intermesenteric nerves as terminate in the inferior @entity4494 . Very few viscerofugal neurons project to the neurons of the major @entity530 , and no viscerofugal neurons project caudally in the hypogastric nerves to these @entity21 . The majority of labelled neurons resembled Dogiel type I morphology. Thus the inferior @entity4494 receives a substantial innervation from viscerofugal neurons of the large intestine, with the greatest supply from the distal colon and rectum.(ABSTRACT TRUNCATED AT 250 WORDS)
