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Biomedical subjects

C W Norris

Publications and source records attributed to C W Norris.

24 records · Page 2Linked to original sources
PubMedDate not supplied

In vivo observation of tracheal microcirculation in dogs.

Tracheal microcirculation was studied in six healthy anesthetized adult mongrel dogs. A transparent balloon was used to apply pressure to the tracheal mucosa during observation of the microcirculation. Pressures of microvascular occlusion were measured using an electrically callibrated silicone, envelope placed on the observation balloon. The different vessel sizes were measured and classified using the operating microscope. Capillary occlusion pressures ranged from 10 to 40 msurements of tracheal diameter were performed. Progressive local and generalized dilatation occurred. Capillary occlusion pressure was lower in the more dilated specimens. The lower than expected occlusion pressures are thought to be a result of the tracheal dilatation and may be related to the administration of drugs or other factors.

Animals↗
PubMedDate not supplied

Ganglioneuroma of the C4, C5 interspace.

Neurogenic tumors in the neck region are relatively infrequent with the exception of those involving the cranial nerves. A case of a ganglioneuroma or neurofibroma involving the nerve root of C4, C5 interspace is reported. The tumor appeared as a mass within the neck with a slight amount of pain in the shoulder and upper arm upon palpation. Surgical exploration revealed a mass superficial to the foramen and erosion of the foramen. Roentgenograms taken in the region demonstrated an extradural mass that was subsequently removed by laminectomy. Postoperatively, the patient did quite well. Surgical excision is the treatment of choice. Preservation of the nerve should be accomplished if at all possible.

Adolescent↗
PubMedDate not supplied

Secretory innervation of the parotid gland.

The reported failures of Jacobson-nerve resection to eliminate parotid secretion in clinical cases suggest that alternative secretory routes to the parotid gland exist. By stimulating the inferior salivatory nucleus and successively transecting suspected pathways, it was found that only the facial nerve trunk carries accessory efferent fibers to the gland in the cat. No efferent fibers were found in the chorda tympani, but afferent fibers of the salivary reflex arc are provided by this nerve.

Afferent Pathways↗