Galvanic Response Graph Skin Response Readings
Each reading is graphed, while peaks are highlighted and an average is calculated to smooth out the values.Transcribed image text: Galvanic Skin Response (Electrodermal Activity) Within a Polygraph Using BIOPAC 7. This setup measures GSR every 50 milliseconds. One lead sends current while the other measures the difference. Two leads are attached to two fingertips. Galvanic skin response readings are simply the measurement of electrical resistance through the body.
The Blood Volume pulse sensor uses photoplethysmography to detect the blood pressure in the extremities.2 Professor, Department of Physiology, RKDF Medical College and Research Centre, Bhopal, INDIA.A Self-paced Relaxation Response Detection System Based on Galvanic Skin Response Analysis. The Blood Volume Pulse Sensor. Increased GSR indicates a heightened sympathetic nervous system arousal. This will open a graph below.1 Assistant Professor, Department of Physiology, Government Medical College, Nagpur, Maharashtra, INDIA.A graph of Galvanic Skin Response (GSR) skin conductance over a 27-minute period during an experiment. NeuLog galvanic skin response logger sensor NUL-217 The NeuLog GSR sensor can be used for any science experiment which utilizes the natural galvanic skin response (skin conductance) in the fields of Biology, Physiology, Psychology, etc. To see the data from this visualization as text, click here.
Results: It was found that the GSR in subjects doing Rajyoga meditation (mean GSR = 34.63) was significantly less (p<0.0001) than the GSR in control subjects not doing Rajyoga meditation (mean GSR=46.6). GSR was recorded using standard instrument. Methods: This cross-sectional study was conducted on 30 subjects doing Rajyoga meditation since more than 6 months and 30 age-matched control subjects not doing Rajyoga meditation. Objective: To evaluate and compare the effect of Rajyoga meditation on GSR. This study was designed to assess the effect of Rajyoga meditation on GSR. Galvanic Skin Response (GSR) is one of the physiological indicators of autonomic nervous system balance and mental status.
Meditation is now considered a method of choice to relieve stress. 1 Stress is the most substantial risk factor for many diseases today. Stress is a ‘non-specific response of the body to any noxious stimuli’, and the stress response is associated with a heightened sympathetic nervous activity.
This takes one into a state of absorption in bliss, peace and happiness through positive thinking. Rajyoga is said to be a practice or art of uniting or linking the mind with God by focusing attention on Him as an incorporeal being of light and thinking of his divine qualities. Philosophy of Rajyoga- The word ‘Yoga’ means ‘to unite’. 2 Various types of Meditation are 1- Transcendental meditation, 2- Vipassana meditation, 3- Zazen meditation, 4- Rajyoga meditation.
GSR measurements also form part of the “lie detector” tests used all over the world. It refers to the voltage measured between two electrodes placed on the skin (on two fingertips) which fluctuates with the emotional state like stress, anxiety. 3 Galvanic skin response (GSR): It is a method of capturing the autonomic nerve responses as a parameter of sweat gland function. It is done at least for 20 minutes. Method of Rajyoga meditation involves: Sitting in a comfortable position with eyes open, Visualising a point of light at the centre of forehead like shining star, thinking about the seven inner qualities of the self namely- peace, love, happiness, purity, power, knowledge, bliss and feel them. It is said to be awareness of the self and absorption of one’s mind in loving and purposeful consciousness of God and his divine attributes.
Thirty subjects aged between 35-50 years, practising regularly Rajyoga (Rajyoga Meditators) for more than six months, daily at least for one hour were included in the study. 4Study design: Cross-sectional study. It creates a shift in the relative conductance of a small electrical current, which runs over the skin between the two electrodes. Exposure to external stimuli causes changes in sweat gland secretion.
Number of physiological markers is used to assess stress like GSR, Blood Pressure (BP), Heart Rate, Respiratory Rate, etc. It is difficult to manage stress, and it is difficult to measure the stress levels. Chronic stress is detrimental to both physical and mental health and is a risk factor for hypertension, Diabetes Mellitus, Coronary Artery Disease, Inflammatory Bowel Disease, Gastro-oesophageal Reflux disease, back pain, depression, anxiety disorders etc. * Statistically highly significantStress provokes body’s “fight or flight” response and causes secretion of adrenaline. It was found that the GSR (Conductance) in subjects doing Rajyoga meditation (mean GSR = 34.63) was significantly less (p<0.0001) than the GSR in control subjects not doing Rajyoga meditation (mean GSR=46.6) as indicated in Table 2.Readings are in µS.
5 GSR is used to assess the balance between sympathetic and parasympathetic arms of ANS. But parasympathetic part relaxes and stabilises the body in the steady state. Sympathetic branch of ANS mobilises the body’s resources for action under stress.
6 Meditation causes tilting of autonomic balance from sympathetic to parasympathetic and reduces the galvanic skin conductance. It increases galvanic skin conductance which is picked up during GSR. 6As stress level increases, sympathetic over activity causes sweat gland to increase secretion. It is a method of capturing the autonomic nerve responses as a parameter of sweat gland function.
Found that during meditation, meditation practitioners showed a small but statistically significant reduction in heart rate and GSR compared to the control group. After the meditation sessions practised for one month, subjects showed physiological relaxation response indicated by a significant decrease in GSR, and they also showed improved cognition. Found that the galvanic skin conductance decreases due to the practice of meditation. Decrease conductance, which reaches its maximum during sleep. 7Johnson and Lubin in their research found that states of relaxation are accompanied by high skin resistance i.e.
11 The study limitation is cross-sectional collection of data which can only reflect the GSR values in study groups with no cause and effect relationship establishment. It may be due to the sympathetic activation in meditation practitioners in response to stress was lesser due to changes attributed to the head ganglion of autonomic nervous system (hypothalamus) by regular practice of meditation. Also found a significant decrease in GSR in Rajyoga meditation practitioners as compared to non-practitioners.
It can become an adjuvant with drug therapy to treat various psychosomatic and lifestyle related disorders.
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