Naresh Kumar - Academia.edu (original) (raw)

Papers by Naresh Kumar

Research paper thumbnail of Effect of Acute Moderate Exercise on Cognitive Event-Related Potentials N100, P200, N200, and Interpeak Latencies

Background: Effect of acute moderate exercise on cognition has been studied recently, although th... more Background: Effect of acute moderate exercise on cognition has been studied recently, although there are controversial reports in this context. This is the reason we performed this study, to observe the effect of acute moderate exercise on the cognitive functions of persons having a sedentary lifestyle, by measuring the latencies of event-related potentials N100, P200, N200, and the inter-peak latencies N100-P200, P200-N200, and N200-P300. Materials and Methods: Sixty right-handed participants (34 males, 26 females) of age group 15-30 years, having a sedentary lifestyle, were recruited for the study. A baseline recording of event-related potentials was conducted and then they were subjected to acute moderate exercise (60-80% of the maximum load of effort during exercise, where 100%=200-Age), again the recording was carried out using the paired student's 't' test, to compare the present values with the initial values. Results: After performing the exercise there was a significant decrease in the latency of wave N1 and P2 of females for both frequent and rare stimuli. A significant decrease in the latency was seen in wave N2 with rare stimulus in both females and males. While, for frequent stimulus a significant decrease was seen only in females. Also the N2-P3 interpeak latency significantly decreased in males, while there was no significant decrease in females. Conclusion: There was a definite role of exercise in enhancing the cognitive functions as evidenced by its effect on the latencies of event-related potentials N100, P200, N200, and interpeak latencies.

Research paper thumbnail of Effect of duration of fluoride exposure on the reproductive system in male rabbits

The study was conducted in the Department of Physiology in collaboration with the Department of P... more The study was conducted in the Department of Physiology in collaboration with the Department of Pathology after approval by the Institutional Animal Ethical Committee. Thirty healthy, adult New Zealand white male rabbits were used for the study. All the rabbits were of the same age group, with a weight range of 1.5-2.5 kg. The rabbits were housed in a well-ventilated animal house

Research paper thumbnail of EFFECTS OF SODIUM FLUORIDE ON THE ELECTROCARDIOGRAM OF MALE RABBITS

Effects of fluoride (F) on electrocardiogram (ECG) values were determined in ten healthy adult ma... more Effects of fluoride (F) on electrocardiogram (ECG) values were determined in ten healthy adult male New Zealand white rabbits. After the initial ECG values were measured, the rabbits were administered 20 mg NaF/kg body weight by oral intubation for two months, and the new ECG values were determined. There was a significant (p<0.001) decrease in the R-R interval (duration between the peaks of two consecutive R waves of ECG) and P-R interval (duration from the starting of P wave to the starting of QRS complex in ECG), while significant (p<0.001) increases in the mean heart rate and corrected QT intervals were observed compared to the initial baseline values. The results indicate that F adversely affects the ECG in male rabbits.

Research paper thumbnail of Knowledge of Swine Flu among Health Care Workers and General Population of Haryana, India during 2009 Pandemic

Research paper thumbnail of A Questionnaire Based Survey from First Year M.B.B.S. Students About Teaching Learning Methods of Physiology in Private Medical College

Background-Time to time evaluation of medical curriculum by experts is the routine practice in me... more Background-Time to time evaluation of medical curriculum by experts is the routine practice in medical education. However the student's perception and opinion about the teaching-learning methodology is equally important because it is meant for them. So, evaluation of teaching-learning methodology by the students in a medical college may further help in modification and construction of the medical curriculum. Considering these facts the present study is undertaken. Objectives-To understand the preferences and perception of medical students about the current methods of teaching and learning, aids used for teaching and also the qualities of the teacher influencing them. Materials and Methods: A detailed structured questionnaire was given to 100 students of 1st year in a our institution. Descriptive statistics were used for analysis of data. Frequency was expressed as percentage. Results-A total of 100 students (54 % males and 46% females) participated in this study. The most preferred teaching method was small group discussion (57%) while practical was the least preferred (18%). The most preferred learning method was tutorials (49%) and quiz programme (42%) while student seminar was the least preferred (9%).The most preferred modality of teaching aid was found to be Black board preferred by 34% students followed by Over Head projector (OHP) and PowerPoint Presentation(PPT). The most influencing quality of the teacher was the ability to teach (42%) and knowledge(38%) followed by enthusiasm(31%), while the personality was least preferred (6%). Conclusion-The results generated in this study suggests that students prefers active learning which should be student centered. Also the traditional chalk and board method with a blend PPT and quiz programme is appealing to the students. So, by using various methods appreciated by the students the teaching and learning of physiology can be made effective , interesting and enjoyable .

Research paper thumbnail of Effect of Acute Moderate Exercise on Cognitive Event-Related Potentials N100, P200, N200, and Interpeak Latencies

Background: Effect of acute moderate exercise on cognition has been studied recently, although th... more Background: Effect of acute moderate exercise on cognition has been studied recently, although there are controversial reports in this context. This is the reason we performed this study, to observe the effect of acute moderate exercise on the cognitive functions of persons having a sedentary lifestyle, by measuring the latencies of event-related potentials N100, P200, N200, and the inter-peak latencies N100-P200, P200-N200, and N200-P300. Materials and Methods: Sixty right-handed participants (34 males, 26 females) of age group 15-30 years, having a sedentary lifestyle, were recruited for the study. A baseline recording of event-related potentials was conducted and then they were subjected to acute moderate exercise (60-80% of the maximum load of effort during exercise, where 100%=200-Age), again the recording was carried out using the paired student's 't' test, to compare the present values with the initial values. Results: After performing the exercise there was a significant decrease in the latency of wave N1 and P2 of females for both frequent and rare stimuli. A significant decrease in the latency was seen in wave N2 with rare stimulus in both females and males. While, for frequent stimulus a significant decrease was seen only in females. Also the N2-P3 interpeak latency significantly decreased in males, while there was no significant decrease in females. Conclusion: There was a definite role of exercise in enhancing the cognitive functions as evidenced by its effect on the latencies of event-related potentials N100, P200, N200, and interpeak latencies.

Research paper thumbnail of Effect of duration of fluoride exposure on the reproductive system in male rabbits

The study was conducted in the Department of Physiology in collaboration with the Department of P... more The study was conducted in the Department of Physiology in collaboration with the Department of Pathology after approval by the Institutional Animal Ethical Committee. Thirty healthy, adult New Zealand white male rabbits were used for the study. All the rabbits were of the same age group, with a weight range of 1.5-2.5 kg. The rabbits were housed in a well-ventilated animal house

Research paper thumbnail of EFFECTS OF SODIUM FLUORIDE ON THE ELECTROCARDIOGRAM OF MALE RABBITS

Effects of fluoride (F) on electrocardiogram (ECG) values were determined in ten healthy adult ma... more Effects of fluoride (F) on electrocardiogram (ECG) values were determined in ten healthy adult male New Zealand white rabbits. After the initial ECG values were measured, the rabbits were administered 20 mg NaF/kg body weight by oral intubation for two months, and the new ECG values were determined. There was a significant (p<0.001) decrease in the R-R interval (duration between the peaks of two consecutive R waves of ECG) and P-R interval (duration from the starting of P wave to the starting of QRS complex in ECG), while significant (p<0.001) increases in the mean heart rate and corrected QT intervals were observed compared to the initial baseline values. The results indicate that F adversely affects the ECG in male rabbits.

Research paper thumbnail of Knowledge of Swine Flu among Health Care Workers and General Population of Haryana, India during 2009 Pandemic

Research paper thumbnail of A Questionnaire Based Survey from First Year M.B.B.S. Students About Teaching Learning Methods of Physiology in Private Medical College

Background-Time to time evaluation of medical curriculum by experts is the routine practice in me... more Background-Time to time evaluation of medical curriculum by experts is the routine practice in medical education. However the student's perception and opinion about the teaching-learning methodology is equally important because it is meant for them. So, evaluation of teaching-learning methodology by the students in a medical college may further help in modification and construction of the medical curriculum. Considering these facts the present study is undertaken. Objectives-To understand the preferences and perception of medical students about the current methods of teaching and learning, aids used for teaching and also the qualities of the teacher influencing them. Materials and Methods: A detailed structured questionnaire was given to 100 students of 1st year in a our institution. Descriptive statistics were used for analysis of data. Frequency was expressed as percentage. Results-A total of 100 students (54 % males and 46% females) participated in this study. The most preferred teaching method was small group discussion (57%) while practical was the least preferred (18%). The most preferred learning method was tutorials (49%) and quiz programme (42%) while student seminar was the least preferred (9%).The most preferred modality of teaching aid was found to be Black board preferred by 34% students followed by Over Head projector (OHP) and PowerPoint Presentation(PPT). The most influencing quality of the teacher was the ability to teach (42%) and knowledge(38%) followed by enthusiasm(31%), while the personality was least preferred (6%). Conclusion-The results generated in this study suggests that students prefers active learning which should be student centered. Also the traditional chalk and board method with a blend PPT and quiz programme is appealing to the students. So, by using various methods appreciated by the students the teaching and learning of physiology can be made effective , interesting and enjoyable .