IJCRR - Vol 07 Issue 15, August, 2015
IMPACT OF GENDER AND HEAD SIZE ON VISUAL EVOKED POTENTIALS
Author: Rubiya Shaikh, Rupali K. Parlewar
The aim of the study is to compare head circumference in Gender and then to correlate head circumference with P100 latency, N75-P100 and P100-N145 amplitude. Visual evoked potentials are electrical potential differences recorded from scalp in response to visual stimuli. Numbers of factors that influence VEP waveforms include Age, Sex, Drugs, Head circumference. In the present study head circumference, P100 latency, N75- P100amplitude and P100 -N 145amplitude were recorded in 30 healthy males and 30 healthy females in the age group of 18-25 yrs. It is observed that head circumference is more in males. Also P100 latency is more in males as compared to females which is attributed to longer visual pathway. And amplitudes are larger in females as compared to males which is attributed to genetically determined sex differences in neuro-endocrinological systems. Present study also shows positive correlation between head circumference and latency and negative correlation between head circumference and amplitude. When the latency and amplitude of both males and females of same head circumference (53-55cm) were compared it was found that latency does not show significant results. But amplitude is more in female which is attributed to genetically determined sex
differences in neuro-endocrinological systems.
Keywords: Visual evoked potential, Head circumference, P100 latency, N75-P100 amplitude, P100-N145 amplitude
Rubiya Shaikh, Rupali K. Parlewar. IMPACT OF GENDER AND HEAD SIZE ON VISUAL EVOKED POTENTIALS International Journal of Current Research and Review. Vol 07 Issue 15, August, 74-76
1. Misra UK, Kalita J. Visual Evoked Potentials, Clinical Neurophysiology. Churchill Livingstone, New Delhi 2011; 309-327.
2. J. Langrová1, J. Kremlá?ek1, M. Kuba1, Z. Kubová1, J. Szanyi1. Gender Impact on Electrophysiological Activity of the Brain Physiol. Res. 61 (Suppl. 2): S119-S127, 2012
3. Stockard JJ. Hughes JR. Sharvough FW. Visually evoked potentials to electronic pattern reversal :latency variation with gender, age and technical factors.Am J EEG Technol 1979: 19:171
4. Kothari R, Singh R, Singh S, Bokariya P. Effect of head circumference on parameters of Pattern reversal visual evoked potentials in healthy adults of central India. Nepal MedColl J 2012; 14 (2) : 75-79.
5. Schmidt Neilsen K. scaling in biology: the consequence of size. J Exp Zool 1975;194: 284-307
6. YasuhiroKaneda Y, Nakayama H, Kagawa K, Furuta N, Ikuta T: Sex differences invisual evoked potential and electroencephalogram of healthy adults. Tokushima J The J of medical investigations 1996; 43 (3-4) : 143-157.
7. B. K. Mahajan. Methods in Biostatistics. 7th Edition.