Effects of age on visual evoked potentials
Journal Title: Medpulse International Journal of Physiology - Year 2018, Vol 6, Issue 1
Abstract
Background: Pattern-reversal visual evoked potential (PRVEP) is an objective, sensitive and non-invasive neurophysiological test that can prove to be a useful clinical tool in investigating the physiology and pathophysiology of human visual system. But results of PRVEP are affected by different physiological parameters like age, gender, head size, BMI. The present study was undertaken to find out the effect of age on pattern –reversal visual evoked potential (PRVEP). Materials and Methods: PRVEP was recorded in 60 healthy volunteers in the age-group of 18-75 years. They were divided into 2 age groups below and above 40 yrs. Mean P100 latencies and N75-P100 amplitudes were compared in 2 groups Result: The present study demonstrated that mean P100 latency is significantly prolonged in older subjects (p<0.001) while mean N75-P100 amplitude is significantly reduced. Conclusion: Prolonged PRVEP P100 latency with age reflects electrophysiological alterations in visual pathways. PRVEPs are useful objective measures to investigate the involvement of neural elements of visual system in the elderly individuals.
Authors and Affiliations
Kiran Narayan Avachar, Avantika Kisanrao Kayapak, Milind Sharad Chitale
Keywords
Related Articles
- EP ID EP359202
- DOI -
- Views 189
- Downloads 0
Study of percentage of difference in dominant and nondominant hand grip strength in cricket players: A cross-sectional study
Background: Hand grip strength has been an indicator for determining strength. Objectives: The purpose of study was to found out percentage of difference in dominant and nondominant hand grip strength in right handed and...
FEV1/FVC among smokers and non smokers: A comparative study
Background: Respiratory Physiological changes in obesity are decreased overall compliance, increased airway resistance and shallow breathing pattern. These changes are due to increased intra abdominal pressure, decreased...
Study of parental history of hypertension on systolic blood pressure
Hypertension is a common public health challenge. Early detection and appropriate treatment is the solution to this problem. The main objective of this study was to identify abnormal Blood Pressure responses in male adul...
Effect of pranayama training on audio-visual reaction time
Present study was conducted to observe effect of short duration pranayama on audio-visual reaction time. One sixty healthy 1st year M.B.B.S. students were participated in the study. Readings of height (meter), weight (kg...
Evaluation of the relationship between nitric oxide level and severity of Plasmodium falciparum malaria
Background: According to WHO’s estimated number of cases, India has the largest number of malaria cases occurring outside of Africa. Karnataka has the highest incidence of malaria in south India and in 2015 nearly 100 th...