Author(s): Gangalapuram Bhanumurthy1
Abducens nerve may present in one of four ways- 1) An isolated partial or complete nerve palsies without any other neurologic signs and symptoms except those related to the palsy itself. 2) In association with symptoms other than those related to the palsy (pain, dysesthesia, paraesthesia), but without any signs of neurologic (or) systemic disease. 3) In association with other ocular motor nerve palsies, but without any other neurologic signs. 4) In association with neurologic signs other than the oculomotor nerve palsy.
MATERIALS AND METHODS
The present study was conducted in Ophthalmic OPD of Government Medical College and Hospital, Anantapur, Andhra Pradesh. 26 cases were examined by proper history taking, complete neurological examination by neurologist and ocular examination to include and exclude the cases properly and the study period was from February 2013 to January 2017. All patients having infranuclear neurologic lesion of VI cranial nerve who attended the ophthalmology OPD were included in the study after taking an informed consent.
Of them, 17.5% of the cases are due to undetermined causes, 3.5% of the cases are due to neoplasms, 7% of the cases are due to vascular pathologies (diabetes mellitus, hypertension, etc.), 3.5% of the cases are due to aneurysms, 48.9% of the cases are due to nonspecific neuritis, 19.6% of the cases are due to various other pathologies.
Of all the causes, nonspecific neuritis is the most common cause followed by undetermined causes and vascular pathologies (diabetes mellitus, hypertension, etc.).