In recent years, some taxonomic controversy has occurred over the genus of North American rat snakes. Based on mitochondrial DNA, Utiger et al. (2002) showed that North American rat snakes of the genus Elaphe, along with closely related genera such as Pituophis and Lampropeltis, form a monophyletic group separate from Old World members of the genus.
A pinched nerve is a type of injury or damage to a nerve or a group of nerves. The injury can result from compression, constriction, or stretching. A pinched nerve can lead to other conditions and cause temporary or permanent damage depending on the extent of the injury. pinched nerve is a type of injury or damage to a nerve or a group of nerves. The injury can result from compression, constriction, or stretching. A pinched nerve can lead to other conditions and cause temporary or permanent damage depending on the extent of the injury.
Anxiety also increases the sensitivity of the esophagus so the sensation is more severe. GERD can also cause esophagus ulcers. An ulcer is an open sore that, in this case, is located in the esophagus. Some symptoms are pain, nausea, heartburn and chest pain, according to the University of Minnesota Medical Center. Barrettâs esophagus is a condition that may occur when the lining of the esophagus changes to be more like the lining of the intestine, according to The National Institute of Diabetes and Digestive and Kidney Diseases.