| quantitative studies of pseudorabies virus in mink, ferrets, rabbits and mice. | | 1971 | 4327892 |
| brainstem sites controlling the lower esophageal sphincter and crural diaphragm in the ferret: a neuroanatomical study. | the lower esophageal sphincter (les) and the crural diaphragm (cd) surrounding the esophagogastric junction are key components of the gastroesophageal reflex mechanism, which engages the vago-vagal brainstem circuitry. although both components work in conjunction to prevent gastroesophageal reflux, little is known about the brain area(s) where this integration takes place. the aims of this study were to: (1) trace the brainstem circuitry associated with the cd and the les, and (2) determine poss ... | 2008 | 18986853 |
| afferent pathways to the region of the vestibular nuclei that participates in cardiovascular and respiratory control. | prior experiments have shown that a region of the medial and inferior vestibular nuclei contributes to cardiovascular and respiratory regulation. in addition to labyrinthine inputs, the majority of neurons in this region of the vestibular nuclei receive signals from the skin, muscle, and viscera, although the pathways conveying these nonlabyrinthine inputs to the vestibular nucleus neurons are unknown. to gain further insight into the afferent pathways to this functionally distinct subdivision o ... | 2005 | 15885222 |
| neurochemical phenotypes of mrf neurons influencing diaphragm and rectus abdominis activity. | in prior studies that used transneuronal transport of isogenic recombinants of pseudorabies virus, we established that medial medullary reticular formation (mrf) neurons sent collateralized projections to both diaphragm and abdominal muscle motoneurons. furthermore, inactivation of mrf neurons in cats and ferrets increased the excitability of diaphragm and abdominal motoneurons, suggesting that mrf neurons controlling respiratory activity are inhibitory. to test this hypothesis, the present stud ... | 2003 | 12391091 |
| transneuronal tracing of neural pathways controlling abdominal musculature in the ferret. | abdominal musculature participates in generating a large number of behaviors and protective reflexes, although each abdominal muscle is frequently activated differentially during particular motor responses. for example, rectus abdominis has been reported to play less of a role in respiration than other abdominal muscles, such as transversus abdominis. in the present study, the inputs to transversus abdominis and rectus abdominis motoneurons were determined and compared using the transneuronal tr ... | 2001 | 11520490 |
| definition of neuronal circuitry controlling the activity of phrenic and abdominal motoneurons in the ferret using recombinant strains of pseudorabies virus. | during a number of behaviors, including vomiting and some postural adjustments, activity of both the diaphragm and abdominal muscles increases. previous transneuronal tracing studies using injection of pseudorabies virus (prv) into either the diaphragm or rectus abdominis (ra) of the ferret demonstrated that motoneurons innervating these muscles receive inputs from neurons in circumscribed regions of the spinal cord and brainstem, some of which have an overlapping distribution in the magnocellul ... | 2000 | 11007904 |
| transneuronal tracing of neural pathways controlling activity of diaphragm motoneurons in the ferret. | previous studies have shown that neurons in addition to those in the medullary respiratory groups are involved in activating phrenic motoneurons during a number of behaviors, including vomiting and reaction to vestibular stimulation. however, the location of premotor inspiratory neurons outside of the main medullary respiratory groups is largely unknown, particularly in emetic species. in the present study, the transneuronal tracer pseudorabies virus was injected into the diaphragm of the ferret ... | 1999 | 10338316 |
| transneuronal tracing of neural pathways controlling an abdominal muscle, rectus abdominis, in the ferret. | abdominal muscles participate in generating a large number of behaviors and reflex responses, including expiration, coughing, sneezing, vomiting, postural control, production of speech, straining, facilitation of venous return to the heart, and reaction to vestibular stimulation. however, the only premotor neurons that have been conclusively shown to influence abdominal motoneurons are located in nucleus retroambiguus, the expiratory region of the caudal ventral respiratory group. in the present ... | 1999 | 10023028 |
| pathologic changes in ferrets exposed to pseudorabies virus. | ferrets experimentally infected by various routes with pseudorabies virus were examined for gross and microscopic lesions. nonsuppurative meningoencephalomyelitis, as well as visceral lesions, occurred. the incubation period seemed related to the viral dose and to the distance between the inoculation site and the central nervous system. the distribution of the lesions in the central nervous system appeared to be closely related to the peripheral nerve pathways from the inoculation sites. other f ... | 1976 | 1275345 |
| transneuronal tracing of neural pathways influencing both diaphragm and genioglossal muscle activity in the ferret. | in prior experiments that employed the transneuronal transport of isogenic recombinants of pseudorabies virus (prv), we demonstrated that neurons located ventrally in the medial medullary reticular formation (mrf) of the ferret provide collateralized projections to both diaphragm and abdominal muscle motoneurons as well as to multiple abdominal muscle motoneuron pools. the goal of the present study was to determine whether single mrf neurons also furnish inputs to diaphragm motoneurons and those ... | 2003 | 12832431 |