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http://hdl.handle.net/1903/6122
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| Title: | Dynamics of Neural Responses in Ferret Primary Auditory Cortex: I. Spectro-Temporal Response Field Characterization by Dynamic Ripple Spectra |
| Authors: | Depireux, Didier A.
Simon, J.Z.
Klein, David J.
Shamma, S.A. |
| Department/Program: | ISR
CAAR |
| Type: | Technical Report |
| Keywords: | neural systems, auditory cortex, spatial frequency, temporal frequency, separability, ripples, |
| Issue Date: | 1999 |
| Series/Report no.: | ISR; TR 1999-62
CAAR; TR 1999-3 |
| Abstract: | To understand the neural representation of broadband, dynamic sounds in Primary Auditory Cortex (AI), we characterize responses using the Spectro-Temporal Response Field (STRF). The STRF describes and predicts the linear response of neurons to sounds with rich spectro-temporal envelopes. It is calculated here from the responses to elementary "ripples," a family of sounds with drifting, sinusoidal, spectral envelopes--the complex spectro-temporal envelope of any broadband, dynamic sound can expressed as the linear sum of individual ripples. <p>The collection of responses to all elementary ripples is the spectro-temporal transfer function. Previous experiments using ripples with downward drifting spectra suggested that the transfer function is separable, i.e., it is reducible into a product of purely temporal and purely spectral functions. <p>Here we compare the responses to upward and downward drifting ripples, assuming separability within each direction, to determine if the total bi-di... |
| URI: | http://hdl.handle.net/1903/6122 |
| Appears in Collections: | Institute for Systems Research Technical Reports
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| TR_99-62.pdf | | 529Kb | Adobe PDF | 35 | View/Open |
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