A comparison of synchronization filters in different auditory receptor organs

Measurements of the frequency dependence of synchronization of cochlear nerve fibers obtained in different auditory receptor organs are compared. These synchronization filter-functions are lowpass filter-functions and differ primarily in corner frequencies which we estimate to be (in kHz): 2.5 (cat), 1.1 (guinea pig), 0.48 (alligator-lizard tectorial fibers), 0.42 (tree frog), and 0.34 (alligator-lizard free-standing fibers). Some of this variation in corner frequency can be explained by temperature-dependent lowpass-filter mechanisms with a temperature factor of 2.6-3.3 for a change in temperature of 10 degrees C. However, factors in addition to temperature must be involved in producing the differences in corner frequency between cat and guinea pig fibers and between tectorial and free-standing fibers in the alligator lizard.

[1]  R. Fay.  Coding of information in single auditory-nerve fibers of the goldfish. , 1978, The Journal of the Acoustical Society of America.

[2]  J. E. Rose,et al.  Phase-locked response to low-frequency tones in single auditory nerve fibers of the squirrel monkey. , 1967, Journal of neurophysiology.

[3]  K L Magleby,et al.  A quantitative description of end‐plate currents , 1972, The Journal of physiology.

[4]  B Katz,et al.  The effect of temperature on the synaptic delay at the neuromuscular junction. , 1965, The Journal of physiology.

[5]  Alexander Joseph.  Book reviewDischarge patterns of single fibers in the cat's auditory nerve: Nelson Yuan-Sheng Kiang, with the assistance of Takeshi Watanabe, Eleanor C. Thomas and Louise F. Clark: Research Monograph no. 35. Cambridge, Mass., The M.I.T. Press, 1965 , 1967 .

[6]  P. M. Narins,et al.  Frequency and time domain comparison of low-frequency auditory fiber responses in two anuran amphibians , 1987, Hearing Research.

[7]  A. Palmer,et al.  Phase-locking in the cochlear nerve of the guinea-pig and its relation to the receptor potential of inner hair-cells , 1986, Hearing Research.

[8]  D. H. Johnson,et al.  The relationship between spike rate and synchrony in responses of auditory-nerve fibers to single tones. , 1980, The Journal of the Acoustical Society of America.

[9]  Frequency Coding in the Inner Ear of Anuran Amphibians , 1938 .

[10]  Murray B. Sachs,et al.  Response Properties of Neurons in the Avian Auditory System: Comparisons with Mammalian Homologues and Consideration of the Neural Encoding of Complex Stimuli , 1980 .

[11]  M. Kordas,et al.  An attempt at an analysis of the factors determining the time course of the end‐plate current , 1972, The Journal of physiology.

[12]  T. F. Weiss,et al.  Stages of degradation of timing information in the cochlea: A comparison of hair-cell and nerve-fiber responses in the alligator lizard , 1988, Hearing Research.

[13]  C. Stevens,et al.  The kinetics of transmitter release at the frog neuromuscular junction , 1972, The Journal of physiology.

[14]  R. Fay,et al.  Phase-locking in goldfish saccular nerve fibres accounts for frequency discrimination capacities , 1978, Nature.

[15]  D. Anderson,et al.  Quantitative model for the effects of stimulus frequency upon synchronization of auditory nerve discharges. , 1973, The Journal of the Acoustical Society of America.

[16]  C. Stevens,et al.  Voltage clamp analysis of acetylcholine produced end‐plate current fluctuations at frog neuromuscular junction , 1973, The Journal of physiology.

[17]  Frequency dependence of synchronization of cochlear nerve fibers in the alligator lizard: Evidence for a cochlear origin of timing and non-timing neural pathways , 1988, Hearing Research.

[18]  A. Ryan,et al.  Neural phase-locking properties in the absence of cochlear outer hair cells , 1981, Hearing Research.

[19]  E D Young,et al.  Discharge patterns of single fibers in the pigeon auditory nerve. , 1974, Brain research.