Which of the following conditions is described as inflammation of a nerve?

Neuritis refers specifically to the inflammation of a nerve or nerves. This condition can arise due to various causes, including infections, autoimmune disorders, and trauma. When nerves become inflamed, they may lead to symptoms such as pain, weakness, numbness, or tingling in the affected area, depending on which nerve is involved.

In this context, myasthenia gravis is an autoimmune condition that affects the communication between nerves and muscles, but it is not classified as inflammation of a nerve itself. Coronary thrombosis refers to a blood clot in the coronary arteries and is unrelated to nerve inflammation. Bronchiectasis is a respiratory condition characterized by abnormal widening of the bronchi and is also not related to nerve inflammation. Understanding the specific definitions and mechanisms of these terms highlights why neuritis is the correct answer, as it directly correlates with the inflammation of a nerve.