PMID: 9163928May 1, 1997Paper

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

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

Abstract

We studied the directionality of spike timing in the responses of single auditory nerve fibers of the grass frog, Rana temporaria, to tone burst stimulation. Both the latency of the first spike after stimulus onset and the preferred firing phase during the stimulus were studied. In addition, the directionality of the phase of eardrum vibrations was measured. The response latency showed systematic and statistically significant changes with sound direction at both low and high frequencies. The latency changes were correlated with response strength (spike rate) changes and were probably the result of directional changes in effective stimulus intensity. Systematic changes in the preferred firing phase were seen in all fibers that showed phaselocking (i.e., at frequencies below 500-700 Hz). The mean phase lead for stimulation from the contralateral side was approximately 140 degrees at 200 Hz and decreased to approximately 100 degrees at 700 Hz. These phaseshifts correspond to differences in spike timing of approximately 2 ms and 0.4 ms respectively. The phaseshifts were nearly independent of stimulus intensity. The phase directionality of eardrum vibrations was smaller than that of the nerve fibers. Hence, the strong directional ph...Continue Reading

Citations

Oct 14, 2004·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·G M KlumpP M Narins
Dec 29, 2005·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Calvin C K Ho, Peter M Narins
Jun 26, 1998·Hearing Research·J Christensen-DalsgaardM Kanneworff
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 12, 2013·Annual Review of Neuroscience·Tatyana O Sharpee
Feb 4, 2021·Journal of Neurophysiology·Jakob Christensen-DalsgaardCatherine E Carr
Sep 29, 2021·The Journal of Experimental Biology·G CapshawC E Carr

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