The Comparative Analysis of the Myenteric Plexus in Pigeon and Hen

Abstract

Using the thiocholine method and histological techniques the myenteric plexuses of pigeon and hen were studied. Investigations revealed the presence of a nervous network in the wall of the small intestine of both animals. It consists of many nerve fibres crossing each other and creating meshes in a variety of shapes. The density of the network was different according to the species and to the parts of intestine. The myenteric plexus from the pigeon's duodenum is thicker (3.7-fold) than in the remaining part of the small intestine; in the hen this is approximately 2.2-fold thicker. The meshes of the duodenum in both species are smaller than in the jejunum and ileum. The results of histological investigations showed different localization of myenteric plexuses; in pigeon in the space between the circular and longitudinal muscle layers, and in hen within the circular muscle.

Effects of infection with Toxoplasma gondii oocysts on the intestinal wall and the myenteric plexus of chicken (Gallus gallus)

“…In this experiment, the structure of the myenteric plexus in both groups was similar to what was described by Kuder et al (2003), formed by ganglions of different sizes and shapes, presenting no modifications as a result of the infection. Quantitative analysis of the myenteric plexus revealed a loss of ~70% of the duodenal neurons.…”

Organisation of Autonomic Nervous Structures in the Small Intestine of Chinchilla (Chinchilla laniger, Molina)

“…The myenteric plexus, also called the Auerbach's plexus, has been analysed in many species: birds (Ali and McLelland, ; Kuder et al., ), small mammals and livestock (Gun, ; Gabella, ; Gabella and Trigg, ; Timmermans et al., ; Maifrino et al., , ; Balemba et al., , ; Meilus et al., ).…”

“…In the remaining parts of the intestine, the density of the meshes was similar in both species: 37 per/cm 2 in the pigeon and 33 per/cm 2 in the hen. The average size of ganglion neurones was 15–20 μm in the pigeon and 19–24 μm in the hen (Ali and McLelland, ; Kuder et al., ).…”

“…The previous studies on this system provided information on its topography, histological composition and effect on the intestine function in many vertebrate species (Gun, ; Costa and Gabella, ; Gabella, ). With improvement in the research methods, knowledge about the submicroscopic structure of intramural plexuses was expanded with morphometric and functional data as well as immunocytochemical characteristics (Ali and McLelland, ; Balemba et al., ; Kuder et al., ; Kleinschmidt et al., ). Moreover, there are numerous studies concerning changes in the structure and number of neurones in intestinal plexuses caused by modified fodder (Greggio et al., ), various diets and stimulants (Meilus et al., ; Pereira et al., ; Natali et al., ), and experimental infections, for example with Trypanosoma cruzi (Maifrino et al., , ).…”

Caudal mesenteric ganglion in the sheep – macroanatomical and immunohistochemical study

“…In laboratory animals, the anatomy of the cranial cervical ganglion, coeliac ganglion and pelvic ganglia have been widely described (Gabella et al 1988, Gabella et al 1992, Gabella and Uvelius 1993, Gabella 1995, Miolan and Niel 1996, Gabella and Davis 1998, Gabella and Uvelius 1998. Anatomical investigations performed in domestic mammals have dealt with the cranial cervical ganglion and the cervicothoracic ganglion in the sheep (Pospieszny 1979, Gabella et al 1988, the coeliac ganglion in the goat (Bhamburkar et al 1993), buffalo (Ribeiro et al 2000b), cat (Feher andBurnstock 1991, Ribeiro et al 2000a) and birds (Kuder et al 2003) and the aorticorenal ganglion in the sheep (Pospieszny 1977), cat (Pospieszny and Kleckowska-Nawrot 2002) and dog (Pospieszny et al 2003). Immunohistochemical studies on CaMG were mainly performed in laboratory animas such as the rat (Herbrecht et al 1995, Sann et al 1995, guinea pig (McLachlan and Llewellyn-Smith 1986, Sann et al 1995, Parr andSharkey 1996) and cat (Cupo et al 1988, Bagnol et al 1993.…”