 |
||||
|
||||
|
||||
|
||||
The Journal of Neuroscience, March 1, 2006, 26(9):2499-2512; doi:10.1523/JNEUROSCI.3731-05.2006
Previous Article | Next Article
Behavioral/Systems/Cognitive
Stimulus-Dependent Auditory Tuning Results in Synchronous Population Coding of Vocalizations in the Songbird Midbrain
Sarah M. N. Woolley, Patrick R. Gill, andFrédéric E. Theunissen Helen Wills Neuroscience Institute and Department of Psychology, University of California, Berkeley, Berkeley, California 94720
Correspondence should be addressed to Sarah M. N. Woolley, Department of Psychology, Columbia University, 406 Schermerhorn Hall, 1190 Amsterdam Avenue, New York, NY 10027. Email: sw2277{at}columbia.edu
Physiological studies in vocal animals such as songbirds indicate that vocalizations drive auditory neurons particularly well. But the neural mechanisms whereby vocalizations are encoded differently from other sounds in the auditory system are unknown. We used spectrotemporal receptive fields (STRFs) to study the neural encoding of song versus the encoding of a generic sound, modulation-limited noise, by single neurons and the neuronal population in the zebra finch auditory midbrain. The noise was designed to match song in frequency, spectrotemporal modulation boundaries, and power. STRF calculations were balanced between the two stimulus types by forcing a common stimulus subspace. We found that 91% of midbrain neurons showed significant differences in spectral and temporal tuning properties when birds heard song and when birds heard modulation-limited noise. During the processing of noise, spectrotemporal tuning was highly variable across cells. During song processing, the tuning of individual cells became more similar; frequency tuning bandwidth increased, best temporal modulation frequency increased, and spike timing became more precise. The outcome was a population response to song that encoded rapidly changing sounds with power and precision, resulting in a faithful neural representation of the temporal pattern of a song. Modeling responses to song using the tuning to modulation-limited noise showed that the population response would not encode song as precisely or robustly. We conclude that stimulus-dependent changes in auditory tuning during song processing facilitate the high-fidelity encoding of the temporal pattern of a song.
Key words: song; MLd; inferior colliculus; neural coding; spike train; single unit
Received Sept. 2, 2005; revised Jan. 20, 2006; accepted Jan. 22, 2006.
Correspondence should be addressed to Sarah M. N. Woolley, Department of Psychology, Columbia University, 406 Schermerhorn Hall, 1190 Amsterdam Avenue, New York, NY 10027. Email: sw2277{at}columbia.edu
This article has been cited by other articles:
C. P. Billimoria, B. J. Kraus, R. Narayan, R. K. Maddox, and K. Sen
Invariance and Sensitivity to Intensity in Neural Discrimination of Natural Sounds
J. Neurosci., June 18, 2008; 28(25): 6304 - 6308.
[Abstract] [Full Text] [PDF]
P. Gill, S. M. N. Woolley, T. Fremouw, and F. E. Theunissen
What's That Sound? Auditory Area CLM Encodes Stimulus Surprise, Not Intensity or Intensity Changes
J Neurophysiol, June 1, 2008; 99(6): 2809 - 2820.
[Abstract] [Full Text] [PDF]
N. A. Lesica and B. Grothe
Dynamic Spectrotemporal Feature Selectivity in the Auditory Midbrain
J. Neurosci., May 21, 2008; 28(21): 5412 - 5421.
[Abstract] [Full Text] [PDF]
T. O. Sharpee, K. D. Miller, and M. P. Stryker
On the Importance of Static Nonlinearity in Estimating Spatiotemporal Neural Filters With Natural Stimuli
J Neurophysiol, May 1, 2008; 99(5): 2496 - 2509.
[Abstract] [Full Text] [PDF]
A. Lak, E. Arabzadeh, and M. E. Diamond
Enhanced Response of Neurons in Rat Somatosensory Cortex to Stimuli Containing Temporal Noise
Cereb Cortex, May 1, 2008; 18(5): 1085 - 1093.
[Abstract] [Full Text] [PDF]
M. B. Ahrens, J. F. Linden, and M. Sahani
Nonlinearities and Contextual Influences in Auditory Cortical Responses Modeled with Multilinear Spectrotemporal Methods
J. Neurosci., February 20, 2008; 28(8): 1929 - 1942.
[Abstract] [Full Text] [PDF]
G. B. Christianson, M. Sahani, and J. F. Linden
The Consequences of Response Nonlinearities for Interpretation of Spectrotemporal Receptive Fields
J. Neurosci., January 9, 2008; 28(2): 446 - 455.
[Abstract] [Full Text] [PDF]
S. S. Shaevitz and F. E. Theunissen
Functional Connectivity Between Auditory Areas Field L and CLM and Song System Nucleus HVC in Anesthetized Zebra Finches
J Neurophysiol, November 1, 2007; 98(5): 2747 - 2764.
[Abstract] [Full Text] [PDF]
S. Andoni, N. Li, and G. D. Pollak
Spectrotemporal Receptive Fields in the Inferior Colliculus Revealing Selectivity for Spectral Motion in Conspecific Vocalizations
J. Neurosci., May 2, 2007; 27(18): 4882 - 4893.
[Abstract] [Full Text] [PDF]
S. Wohlgemuth and B. Ronacher
Auditory Discrimination of Amplitude Modulations Based on Metric Distances of Spike Trains
J Neurophysiol, April 1, 2007; 97(4): 3082 - 3092.
[Abstract] [Full Text] [PDF]
Y. E. Cohen, F. Theunissen, B. E. Russ, and P. Gill
Acoustic Features of Rhesus Vocalizations and Their Representation in the Ventrolateral Prefrontal Cortex
J Neurophysiol, February 1, 2007; 97(2): 1470 - 1484.
[Abstract] [Full Text] [PDF]
|
|
|
|
 |
|