PMID: 9163927May 1, 1997Paper

Directionality of auditory nerve fiber responses to pure tone stimuli in the grassfrog, Rana temporaria. I. Spike rate responses

Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology
M B Jørgensen, J Christensen-Dalsgaard

Abstract

We studied the directionality of spike rate responses of auditory nerve fibers of the grassfrog, Rana temporaria, to pure tone stimuli. All auditory fibers showed spike rate directionality. The strongest directionality was seen at low frequencies (200-400 Hz), where the spike rate could change by up to nearly 200 spikes s-1, with sound direction. At higher frequencies the directional spike rate changes were mostly below 100 spikes s-1. In equivalent dB SPL terms (calculated using the fibers' rate-intensity curves) the maximum directionalities were up to 15 dB at low frequencies and below 10 dB at higher frequencies. Two types of directional patterns were observed. At frequencies below 500 Hz relatively strong responses were evoked by stimuli from the ipsilateral (+90 degrees) and contralateral (-90 degrees) directions while the weakest responses were evoked by stimuli from frontal (0 degree or +30 degrees) or posterior (-135 degrees) directions. At frequencies above 800 Hz the strongest responses were evoked by stimuli from the ipsilateral direction while gradually weaker responses were seen as the sound direction shifted towards the contralateral side. At frequencies between 500 and 800 Hz both directional patterns were seen. ...Continue Reading

Citations

Dec 29, 2005·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Calvin C K Ho, Peter M Narins
Nov 9, 2007·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Taffeta M ElliottDarcy B Kelley
Jun 26, 1998·Hearing Research·J Christensen-DalsgaardM Kanneworff
Feb 18, 2011·Journal of Neurophysiology·Jakob Christensen-DalsgaardCatherine E Carr
Feb 8, 2014·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Michael S CaldwellMark A Bee
Sep 8, 2005·Brain Research Bulletin·Jakob Christensen-Dalsgaard, Morten Kanneworff
Jul 28, 2016·Current Opinion in Neurobiology·Catherine E Carr, Jakob Christensen-Dalsgaard
Feb 4, 2021·Journal of Neurophysiology·Jakob Christensen-DalsgaardCatherine E Carr

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