Roshani, Desai (2012) Study of the clinical course of abducens nerve palsy and outcome of its surgical intervention. Masters thesis, Madras Medical College, Chennai.
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Abstract
INTRODUCTION: The abducens nerve or abducent nerve (the sixth cranial nerve, also called the sixth nerve or VI) is a somatic efferent nerve that controls the movement of a single muscle, the lateral rectus muscle of the eye, in humans. In most other mammals it also innervates the musculus retractor bulbi, which can retract the eye for protection. Homologous abducens nerves are found in all vertebrates except lampreys and hagfishes. The human sixth cranial nerve is derived from the basal plate of the embryonic pons. The Latin name for the sixth cranial nerve is nervus abducens. The Terminologia Anatomica officially recognizes two different English translations: abducent nerve and abducens nerve. Either term is correct. AIMS AND OBJECTIVES: Primary Objectives: 1. To determine the etiology of sixth cranial nerve palsy. 2. To analyze the clinical course of the disease. 3. To alleviate diplopia. 4. To regain full range of binocular extra ocular movements. 5. To align eyes in primary gaze surgically. Secondary Objective: To improve the cosmetic appearance of the patients. MATERIALS AND METHODS: Subject Selection : 57 eyes of 50 patients attending Ophthalmology OPD diagnosed with isolated 6th cranial nerve palsy during two year period. (June 2009 and June 2011). Inclusion Criteria : 1. All patients with diplopia due to lateral rectus palsy. 2. Patients of all age groups Exclusion Criteria : 1. Associated neurological manifestations 2. Duane’s retraction syndrome 3. Restrictive causes of esodeviation 4. Sensory esotropia CONCLUSION: 1. The incidence of isolated sixth cranial nerve palsy had a bimodal peak, first peak between ages 21 to 30 years and second between ages 51 to 60. 2. Incidence of isolated sixth cranial nerve palsy in males was higher than females in our study. Ratio of Males : Females was 1.7 : 1 3. Right and left eyes were almost equally affected in our study.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | abducens nerve palsy; surgical intervention; abducent nerve; sixth cranial nerve |
| Subjects: | MEDICAL > Ophthalmology |
| Depositing User: | Devi S |
| Date Deposited: | 31 Jul 2017 09:51 |
| Last Modified: | 31 Jul 2017 09:51 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/2387 |
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