Cognitive Neuroscience Laboratory

The cognitive neuroscience laboratory (CNL) through its multidisciplinary approach studies the neural underpinnings of human behavior, primarily using 128 channel dense EEG, Evoked Potentials, functional Near Infrared Spectroscopy (fNIRS) and functional transcranial Doppler (fTCD).

The cognitive neuroscience research group targets to ascertain the role of yoga as a mind-body intervention in regulating the neural processes influencing cognition pertaining to various mental states. Recent studies from this group with f-MRI & dense array EEG has identified increased activity of cortical areas associated with working memory, and attention following cyclic meditation. Also, an interesting observation of better performance in an attention based task despite having lesser Oxy-hemoglobin levels in pre-frontal cortex of meditators has been reported.

This group focuses on understanding the default mode network in yoga practicing population and are exploring the mechanisms of enhancing the process of cognition in elderly populations with yoga practices.


  • Understanding the basic neural processes that underlie complex higher-order cognitive operations
  • Understanding the functional and neural mechanisms of cognitive processes related to yoga practices
  • Understand event related potentials [ERPs] while performing attention tasks related to yoga practices

Research Facilities

  • 128 Channel Electro Encephalogram (EEG)
  • 64 Channel Functional Near Infrared Spectroscopy (fNIRS)
  • Functional Transcranial Doppler Sonography (fTCD)
  • 16 Chanel Evoked Potential system



  1. Bhargav, H., Nagendra, H. R., Gangadhar, B. N., and Nagarathna, R. (2014). Frontal Hemodynamic responses to high frequency yoga breathing in schizophrenia: a functional near-infrared spectroscopy study. Frontiers in Psychiatry, 5 (29):1-6.
  2. Carlos V. R., Deepeshwar, S., Sanjay, K., Bhargav, H., Manjunath, K., and Nagendra, H. R. (2014). Resting state functional near infrared spectroscopy. Health Care Exchanges (PAHCE), 2013 Pan American, pp. 1-1. IEEE, 20131-1.


3. Telles, S., Deepeshwar S., Naveen, K. V., and Subramanya, P, (2014). Long Latency Auditory Evoked Potentials during Meditation. Clinical EEG and Neuroscience, [In press].

  1. Deepeshwar, S., Telles, S. (2013). Auditory Information Processing During Meditation Based on Evoked Potential Studies. Journal of Neurology and Psychology, 1(2):7.
  2. Delgado-Pastor, L. C., Perakakis, P, Subramanya, P, Telles, S, and Vila, J. (2013). Mindfulness (Vipassana) meditation: Effects on P3b event-related potential and heart rate variability. International Journal of Psychophysiology, S0167-8760(13):00214-6.
  3. Tripathi, S., and Nagarathna, R. (2011).  Clinical round up: Selected treatment option for Bronchitis. Journal of Alternative & Complementary Medicine, 17 (6):349-353.
  4. Kumar,S., Nagendra, H.R., Naveen,K.V.,Manjunath, N. K. and Telles, S. (2010).Brainstem auditory-evoked potentials in two meditative mental states. International Journal of Yoga, 3(2):37-41.
  5. Subramanya, P., and Telles,S. (2009). Changes in midlatency auditory evoked potentials following two yoga based relaxation techniques. Clinical EEG and Neuroscience, 40(3):190- 195.
  6. Joshi,M. ,and Telles,S.(2009). A nonrandomized non-naïve, comparative study of the ef- fects of kapalabhati and breath awareness on  event-related potentials in trained yoga prac- titioners. Journal of Alternative and Complementary Medicine, 15(3):281-285
  7. Sarang, S. P., and Telles, S. (2006). Changes in P300 following two yoga relaxation techniques. International Journal of Neuroscience, 116(12):1419-1430.
  8. Raghuraj, P., and Telles,S. (2004).Right Uninostril yoga breathing influences ipsilateral com-ponents of middle latency auditory evoked potentials. Neurological Sciences, 25(5):274- 280.
  9. Telles, S., and Naveen, K.V. (2004).Changes in middle latency auditory evoked potentials during meditation. Psychological Reports, 94 (2):398-400.
  10. Manjunath, N. K., Srinivasa, R., Nirmala, K. S., Nagendra, H.R., Kumar, A., and Telles, S. (1998). Shorter latencies of middle latency auditory evoked potentials in congenitally blind compared to normal sighted subjects. International Journal of Neuroscience,        95(3-4): 173- 181.
  11. Naveen, K.V., Srinivas, R., Nirmala, K.S., Nagarathna, R., Nagendra, H. R., and Telles, S. (1998). Differences between congenitally blind and normally sighted subjects in the P1 component           of middle latency auditory evoked potentials. Perceptual and Motor Skills, 86(3Pt2):1192-1194.
  12. Telles, S., Nagarathna, R., Nagendra, H. R. and Desiraju, T. (1994). Alterations in auditory middle latency evoked potentials during meditation on a meaningful symbol-‘OM’. Inter- national Journal of Neuroscience,76(1-2):87-93.
  13. Telles,  S., and Desiraju,T.(1993).Recording of auditory middle latency evoked potentials during the practice of meditation with the syllable ‘OM’. Indian Journal of Medical Research, 98(B):237-239.
  14. Telles,  S., Joseph , C., Venkatesh, S., and Desiraju, T. (1993).Alteration of auditory          middle latency evoked potentials during yogic consciously regulated breathing and attentive state of mind. International Journal of Psychophysiology,14(3):189-198.
  15. Raghavendra, B. R and Telles, S. (2013). Performance in attentional tasks following meditative focusing and focusing without meditation. Anscient Science of Life, 32(1): 49-53.