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  • Ranjan Batra, PhD

    batra, r NEW

    Director, Graduate Program in Clinical Anatomy
    Associate Professor, Neurobiology and Anatomical Sciences
    Associate Professor, Otolaryngology and Communicative Sciences
    Office: R737-2
    Phone: (601) 984-1652
    E-mail: rbatra@umc.edu

    Education

    • BSc - University of Guelph, Guelph, ON, Canada 1976, Honours Biophysics
    • PhD - Syracuse University, Syracuse, NY, 1983, Neuroscience. Dissertation title: "Efferent Control of Visual Processing in the Lateral Eye of the Horseshoe Crab." Advisor: Robert B. Barlow, Jr., PhD
    • Postdoctoral Associate - Department of Anatomy, University of Connecticut Health Center, Farmington, CT, 1983-86. Mentor: Shigeyuki Kuwada, PhD

    Teaching responsibilities

    • Course Director for Essentials of Anatomy
    • Instructor for Medical Gross Anatomy
    • Lecturer for Neurobiology
    • Lecturer for Foundations of Neuroscience
    • Lecturer for Introduction to Problems in Clinical Anatomy

    Selected publications

    Reviews, chapters and books

    • Batra, R. (2014) Inferior Colliculus. In: Encyclopedia of the Neurological Sciences, 2nd Ed., M. Aminoff and R.B. Daroff eds. Academic Press, San Diego, pg. 692-694.
    • Batra, R. (2003) Inferior Colliculus. In: Encyclopedia of the Neurological Sciences, 1st Ed., M. Aminoff and R.B. Daroff eds. Academic Press, San Diego, pg. 653-656
    • Batra R., Fitzpatrick D.C. (2002) Monaural and binaural processing in the ventral nucleus of the lateral lemniscus: a major source of inhibition to the inferior colliculus. Hearing Res 168:90-97, 2002.
    • Kuwada, S., Batra, R., Fitzpatrick, D. (1997) Neural processing of binaural temporal cues. In: Binaural and Spatial Hearing in Real and Virtual Environments, R.H. Gilke and T.R. Anderson eds. Lawrence Erlbaum Associates, Mahwah, NJ, pg. 399-425.
    • Batra, R. (1993) Interaural temporal coding of complex high-frequency sounds: a transformation in the inferior colliculus? In: Sensory Research: Multimodal Perspective, R.T. Verrillo ed. Lawrence Erlbaum Assoc. Inc., Hillsdale, NJ, pg. 141-150.
    • Batra, R. (1983) Efferent control of visual processing in the lateral eye of the horseshoe crab. Special Report, ISR-S-22, Syracuse University. 

    Peer-reviewed papers

    • Batra, R. (2006) Responses of neurons in the ventral nucleus of the lateral lemniscus to sinusoidally amplitude modulated tones. J Neurophysiol 96: 2388-2398.
    • Kuwada, S., Fitzpatrick, D.C., Batra, R., Ostapoff, E.-M. (2006) Sensitivity to interaural time differences in the dorsal nucleus of the lateral lemniscus of the unanesthetized rabbit: comparison with other structures. J Neurophysiol 95: 1309-1322.
    • Batra, R., Yin, T.C.T. (2004) Cross-correlation by neurons of the medial superior olive: a reexamination. JARO  5: 238-252.
    • Oliver, D.L., Beckius, G.E., Bishop, D.C., Loftus, W.C., Batra, R. (2003) Topography of interaural temporal disparity coding in projections of medial superior olive to inferior colliculus. J Neurosci 23: 7438 -7449.
    • Batra, R., Fitzpatrick D.C. (2002). Processing of interaural temporal disparities in the medial division of the ventral nucleus of the lateral lemniscus. J Neurophysiol 88: 666-675, 2002.
    • Fitzpatrick D.C., Kuwada S., Batra R. (2002) Transformations of ITD processing between the superior olivary complex and inferior colliculus. Hearing Res 168: 79-89, 2002.
    • Kuwada S., Anderson J.S., Batra R., Fitzpatrick D.C., Teissier N., D'Angelo W. (2002) Sources of the scalp-recorded amplitude-modulation following response. J Am Acad Audiol 13: 188-204.
    • Fitzpatrick, D.C., Kuwada, S., Batra, R. (2000) Neural sensitivity to interaural time differences: beyond the Jeffress model. J Neurosci 20: 1605-1615.
    • Batra, R., Fitzpatrick, D.C. (1999) Discharge patterns of neurons in the ventral nucleus of the lateral lemniscus of the unanesthetized rabbit. J Neurophysiol 82: 1097-1113.
    • Fitzpatrick, D.C., Kuwada, S., Kim, D.O., Parham, K., Batra, R. (1999) Responses of neurons to click-pairs as simulated echoes: auditory nerve to auditory cortex. J Acoust Soc Am 106:3460-3472.
    • Beckius, G.E., Batra, R., Oliver, D.L. (1999) Axons from anteroventral cochlear nucleus that terminate in medial superior olive of cat: observations related to delay lines. J Neurosci 19: 3146-3161.
    • Kuwada, S., Batra, R. (1999) Coding of sound envelopes by inhibitory rebound in neurons of the superior olivary complex in the unanesthetized rabbit. J Neurosci 19: 2273-2287.
    • Batra, R., Kuwada, S., Fitzpatrick, D.C. (1997) Sensitivity to interaural temporal disparities of low- and high-frequency neurons in the superior olivary complex: I. Heterogeneity of responses. J Neurophysiol 78: 1222-1236.
    • Batra, R., Kuwada, S., Fitzpatrick, D.C. (1997) Sensitivity to interaural temporal disparities of low- and high-frequency neurons in the superior olivary complex: II. Coincidence detection. J Neurophysiol 78: 1237-1247.
    • Kuwada, S., Batra, R., Yin, T.C.T., Oliver, D.L., Haberly, L.B., Stanford, T.R. (1997) Intracellular recordings in response to monaural and binaural stimulation of neurons in the inferior colliculus of the cat. J Neurosci 17: 7565-7581.
    • Batra, R., Fitzpatrick, D.C. (1997) Neurons sensitive to interaural temporal disparities in the medial part of the ventral nucleus of the lateral lemniscus. J Neurophysiol (Rapid Comm.)  78: 511-515.
    • Fitzpatrick, D.C., Batra, R., Stanford, T.R., Kuwada S. (1997) A neuronal population code for sound localization. Nature 388: 871-874.
    • Fitzpatrick, D.C., Kuwada, S., Batra, R., Trahiotis, C. (1995) Neural responses to simple, simulated echoes in the auditory brainstem of the unanesthetized rabbit. J Neurophysiol 74: 2469-2486.
    • Feng, J.J., Kuwada, S., Ostapoff, E.-M., Batra, R., Morest, D.K. (1994) A physiological and structural study of neuron types in the cochlear nucleus. I. Intracellular responses to acoustic stimulation and current injection. J Comp Neurol 346: 1-18.
    • Batra, R., Kuwada, S., Stanford, T. R. (1993) High-frequency neurons in the inferior colliculus that are sensitive to interaural delays of amplitude-modulated tones: evidence for dual binaural influences. J Neurophysiol 70: 64-80.
    • Stanford, T. R., Kuwada S., Batra. R. (1992) A comparison of the interaural time sensitivity of neurons in the inferior colliculus and thalamus of the unanesthetized rabbit. J Neurosci 12: 3200-3216.
    • Batra, R., Barlow, R. B., Jr. (1990) Efferent control of temporal response properties of the Limulus lateral eye. J Gen Physiol 95: 229-244.
    • Batra, R., Kuwada, S., Stanford, T. R. (1989) Temporal coding of envelopes and their interaural delays in the inferior colliculus of the unanesthetized rabbit. J Neurophysiol 61: 257-268.
    • Kuwada, S., Batra, R., Stanford, T. R. (1989) Monaural and binaural response properties of neurons in the inferior colliculus of the rabbit: effects of sodium pentobarbital. J Neurophysiol 61: 269-282.
    • Kuwada, S., Stanford, T. R., Batra, R. (1987) Interaural phase sensitive units in the inferior colliculus of the unanesthetized rabbit. Effects of changing frequency. J Neurophysiol 57: 1338-1360.
    • Batra, R., Kuwada, S., Maher, V. L. (1986) The frequency-following response to continuous tones in humans. Hearing Res 21: 167-177.
    • Kuwada, S., Batra, R., Maher, V. L. (1986) Scalp potentials of normal and hearing-impaired subjects in response to sinusoidally amplitude-modulated tones. Hearing Res 21: 179-192.
    • Batra, R., Chamberlain, S. C. (1985) Central connections of Limulus ventral photoreceptors revealed by intracellular staining. J Neurobiol 16: 435-441.

    Previous academic appointments

    • 1999-2005 - Assistant Professor, Department of Anatomy, University of Mississippi Medical Center, Jackson, MS
    • 1993-99 - Assistant Professor in Residence, Department of Anatomy, University of Connecticut Health Center, Farmington, CT
    • 1986-93 - Instructor in Residence, Department of Anatomy, University of Connecticut Health Center, Farmington, CT 1993