From DNA Replication at ThinkQuest. In general, DNA is replicated by uncoiling of the helix, strand separation by breaking of the hydrogen bonds between the complementary strands, and synthesis of two new strands by complementary base pairing. Replication begins at a specific site in the DNA called the origin of replication.
For Meniereâs disease, destructive procedures are associated with better control of vertigo than shunt surgery, showing good control in over 90% of patients followed for five or more years. The vestibular nerve may be sectioned via the middle fossa, retrolabyrinthine, and retrosigmoid approaches, with similar efficacy.
The most common causes of vertigo are inner ear infections or diseases of the ear such as benign paroxysmal positional vertigo (BPPV), vestibular neuritis, and Meniere's disease.BPPV can occur when calcium builds up in canals of the inner ear, causing brief dizziness that lasts from 20 seconds to one minute.It is usually brought on by trauma to the head or by moving the head in certain positions.he most common causes of vertigo are inner ear infections or diseases of the ear such as benign paroxysmal positional vertigo (BPPV), vestibular neuritis, and Meniere's disease.