PMID: 9447715Feb 3, 1998Paper

Frequency tuning, latencies, and responses to frequency-modulated sweeps in the inferior colliculus of the echolocating bat, Eptesicus fuscus

Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology
M FerragamoJames A Simmons

Abstract

Neurons in the inferior colliculus (IC) of the awake big brown bat, Eptesicus fuscus, were examined for joint frequency and latency response properties which could register the timing of the bat's frequency-modulated (FM) biosonar echoes. Best frequencies (BFs) range from 10 kHz to 100 kHz with 50% tuning widths mostly from 1 kHz to 8 kHz. Neurons respond with one discharge per 2-ms tone burst or FM stimulus at a characteristic latency in the range of 3-45 ms, with latency variability (SD) of 50 microseconds to 4-6 ms or more. BF distribution is related to biosonar signal structure. As observed previously, on a linear frequency scale BFs appear biased to lower frequencies, with 20-40 kHz overrepresented. However, on a hyperbolic frequency (linear period) scale BFs appear more uniformly distributed, with little overrepresentation. The cumulative proportion of BFs in FM1 and FM2 bands reconstructs a scaled version of the spectrogram of FM broadcasts. Correcting FM latencies for absolute BF latencies and BF time-in-sweep reveals a subset of IC cells which respond dynamically to the timing of their BFs in FM sweeps. Behaviorally, Eptesicus perceives echo delay and phase with microsecond or even submicrosecond accuracy and resolutio...Continue Reading

Citations

Nov 13, 2010·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·James A Simmons, Andrea Megela Simmons
Mar 31, 2010·Proceedings of the National Academy of Sciences of the United States of America·Shizuko HiryuHiroshi Riquimaroux
Apr 1, 1999·Annual Review of Physiology·E Covey, J H Casseday
Jun 26, 2009·Journal of Neurophysiology·Khaleel A Razak, Zoltan M Fuzessery
Oct 28, 2011·Journal of Neurophysiology·Asohan AmarasinghamStuart Geman
Jul 4, 2008·Journal of Neurophysiology·Xiaofeng Ma, Nobuo Suga
Jan 14, 2011·The Journal of Experimental Biology·Mary E Bates, James A Simmons
Sep 8, 2010·The Journal of the Acoustical Society of America·Kazuhiro GotoHiroshi Riquimaroux
Dec 13, 2005·The Journal of the Acoustical Society of America·Mark I Sanderson, James A Simmons
Jul 16, 2002·Hearing Research·Laura M HurleyGeorge D Pollak
Nov 19, 2003·The European Journal of Neuroscience·Steffen R Hage, Günter Ehret
Jan 22, 2005·The Journal of the Acoustical Society of America·Murat AytekinCynthia F Moss
Nov 8, 2008·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Sarah A StamperJames A Simmons
Oct 14, 2005·Journal of Neurophysiology·Kristin Kelly PorterJennifer M Groh
Sep 18, 2010·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Yossi YovelHans-Ulrich Schnitzler
Dec 15, 2012·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Andrea Megela Simmons
Aug 11, 2020·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·James A SimmonsAndrea Megela Simmons
Jun 16, 1999·Journal of Neurophysiology·M W OramB J Richmond
Apr 12, 2000·Journal of Neurophysiology·M I Sanderson, J A Simmons
Oct 9, 2019·The Journal of the Acoustical Society of America·Jinhong LuoJames A Simmons
Feb 18, 2021·PLoS Computational Biology·Chen MingJames A Simmons
Jun 29, 2021·PLoS Computational Biology·Adarsh Chitradurga AchuthaDieter Vanderelst
May 1, 2007·Journal of Chemical Neuroanatomy·Raphael Pinaud, Claudio V Mello
Sep 9, 2021·Journal of Neurophysiology·Michaela WarneckeAndrea Megela Simmons

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