An AC constant-response method for electrophysiological measurements of spectral sensitivity functions
A number of methods have been used in the past to measure spectral sensitivity ( S(λ)) functions of electric responses in the visual system. We present here a microcomputer-based, AC, constant-response method for automatic on-line measurement of S(λ) in cells with or without a sustained tonic respon...
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| Published in: | Journal of neuroscience methods Vol. 68; no. 2; pp. 203 - 210 |
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| Main Authors: | , , , |
| Format: | Journal Article |
| Language: | English |
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Amsterdam
Elsevier B.V
01-10-1996
Elsevier Science |
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| Abstract | A number of methods have been used in the past to measure spectral sensitivity (
S(λ)) functions of electric responses in the visual system. We present here a microcomputer-based, AC, constant-response method for automatic on-line measurement of
S(λ) in cells with or without a sustained tonic response. It is based on feedback adjustment of light intensity to obtain constant peak-to-peak amplitudes of response to a flickering stimulus as the spectrum is scanned between 300 and 700 nm in 4 nm steps. It combines the advantages of: (1) on-line presentation of
S(λ) curves; (2) constant light adaptation; (3) sampling of many points; and (4) fast data collection time. The system can be applied to sensitivity or threshold (e.g.,
S(λ), dark adaptation, receptive field) measurements of any electrically recorded visual response. |
|---|---|
| AbstractList | A number of methods have been used in the past to measure spectral sensitivity (S( lambda )) functions of electric responses in the visual system. We present here a microcomputer-based, AC, constant-response method for automatic on-line measurement of S( lambda ) in cells with or without a sustained tonic response. It is based on feedback adjustment of light intensity to obtain constant peak-to-peak amplitudes of response to a flickering stimulus as the spectrum is scanned between 300 and 700 nm in 4 nm steps. It combines the advantages of: (1) on-line presentation of S( lambda ) curves; (2) constant light adaptation; (3) sampling of many points; and (4) fast data collection time. The system can be applied to sensitivity or threshold (e.g., S( lambda ), dark adaptation, receptive field) measurements of any electrically recorded visual response. A number of methods have been used in the past to measure spectral sensitivity ( S(λ)) functions of electric responses in the visual system. We present here a microcomputer-based, AC, constant-response method for automatic on-line measurement of S(λ) in cells with or without a sustained tonic response. It is based on feedback adjustment of light intensity to obtain constant peak-to-peak amplitudes of response to a flickering stimulus as the spectrum is scanned between 300 and 700 nm in 4 nm steps. It combines the advantages of: (1) on-line presentation of S(λ) curves; (2) constant light adaptation; (3) sampling of many points; and (4) fast data collection time. The system can be applied to sensitivity or threshold (e.g., S(λ), dark adaptation, receptive field) measurements of any electrically recorded visual response. |
| Author | DeVoe, R.D. Schoeps, C. Ventura, D.F. de Souza, J.M. |
| Author_xml | – sequence: 1 givenname: J.M. surname: de Souza fullname: de Souza, J.M. email: johns@usp.br organization: Department of Experimental Psychology, Institute of Psychology, University of São Paulo, Av. Prof. Mello Moraes 1721, São Paulo 05508-900, Brazil – sequence: 2 givenname: R.D. surname: DeVoe fullname: DeVoe, R.D. organization: School of Optometry, Indiana University, 800 East Atwater, Bloomington, IN 47405, USA – sequence: 3 givenname: C. surname: Schoeps fullname: Schoeps, C. organization: Flexsys Engenharia, São Paulo, Brazil – sequence: 4 givenname: D.F. surname: Ventura fullname: Ventura, D.F. organization: Department of Experimental Psychology, Institute of Psychology, University of São Paulo, Av. Prof. Mello Moraes 1721, São Paulo 05508-900, Brazil |
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| Cites_doi | 10.1007/BF00696346 10.1007/BF00694142 10.1007/BF00190398 10.1007/BF00657606 10.1007/BF01338560 10.1007/BF00299270 10.1007/BF00191414 |
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| Keywords | Electrophysiology Spectral sensitivity Color vision Insect Experimental automation Eye Visual system Arthropoda Insecta Photoreceptor Measurement method Invertebrata |
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| References | Laughlin, Hardie (BIB7) 1978; 128 Menzel (BIB9) 1974; 93 Autrum, Von Zwehl (BIB1) 1964; 48 Maksimov (BIB8) 1988; 2 de Souza, DeVoe, Ventura (BIB3) 1993; 34 Laughlin (BIB6) 1973; 84 de Souza, Menzel, Ventura (BIB4) 1985; 18 Zettler, Järvilehto (BIB12) 1973; 85 de Souza, Ventura, DeVoe (BIB5) 1994; 35 de Souza, Hertel, Ventura, Menzel (BIB2) 1992; 170 Peitsch, Fietz, Hertel, de Souza, Ventura, Menzel (BIB11) 1992; 170 Menzel, Ventura, Hertel, de Souza, Greggers (BIB10) 1986; 158 de Souza (10.1016/0165-0270(96)00076-3_BIB5) 1994; 35 Peitsch (10.1016/0165-0270(96)00076-3_BIB11) 1992; 170 Laughlin (10.1016/0165-0270(96)00076-3_BIB6) 1973; 84 Autrum (10.1016/0165-0270(96)00076-3_BIB1) 1964; 48 de Souza (10.1016/0165-0270(96)00076-3_BIB4) 1985; 18 Menzel (10.1016/0165-0270(96)00076-3_BIB10) 1986; 158 Laughlin (10.1016/0165-0270(96)00076-3_BIB7) 1978; 128 de Souza (10.1016/0165-0270(96)00076-3_BIB2) 1992; 170 de Souza (10.1016/0165-0270(96)00076-3_BIB3) 1993; 34 Maksimov (10.1016/0165-0270(96)00076-3_BIB8) 1988; 2 Zettler (10.1016/0165-0270(96)00076-3_BIB12) 1973; 85 Menzel (10.1016/0165-0270(96)00076-3_BIB9) 1974; 93 |
| References_xml | – volume: 18 start-page: 633A year: 1985 ident: BIB4 article-title: Improved spectral sensitivity measurements in bee photoreceptors made with the constant-response method publication-title: Braz. J. Med. Biol. Res. contributor: fullname: Ventura – volume: 2 start-page: 5 year: 1988 end-page: 9 ident: BIB8 article-title: Approximation of visual absorption spectra publication-title: Sensornye Sistemy contributor: fullname: Maksimov – volume: 93 start-page: 337 year: 1974 end-page: 346 ident: BIB9 article-title: Spectral sensitivity of monopolar cells in the bee lamina publication-title: J. Insect Physiol. contributor: fullname: Menzel – volume: 158 start-page: 165 year: 1986 end-page: 177 ident: BIB10 article-title: Spectral sensitivity of photoreceptors in insect compound eyes: Comparison of species and methods publication-title: J. Comp. Physiol. 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A doi: 10.1007/BF01338560 contributor: fullname: Menzel – volume: 48 start-page: 357 year: 1964 ident: 10.1016/0165-0270(96)00076-3_BIB1 article-title: Die spektrale Empfindlichkeit einzelner Sehzellen des Bienenauges publication-title: Z. Vergl. Physiol. doi: 10.1007/BF00299270 contributor: fullname: Autrum – volume: 170 start-page: 267 year: 1992 ident: 10.1016/0165-0270(96)00076-3_BIB2 article-title: Response properties of stained monopolar cells in the honeybee lamina publication-title: J. Comp. Physiol. A doi: 10.1007/BF00191414 contributor: fullname: de Souza – volume: 2 start-page: 5 year: 1988 ident: 10.1016/0165-0270(96)00076-3_BIB8 article-title: Approximation of visual absorption spectra publication-title: Sensornye Sistemy contributor: fullname: Maksimov |
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| Snippet | A number of methods have been used in the past to measure spectral sensitivity (
S(λ)) functions of electric responses in the visual system. We present here a... A number of methods have been used in the past to measure spectral sensitivity (S(lambda)) functions of electric responses in the visual system. We present... A number of methods have been used in the past to measure spectral sensitivity (S( lambda )) functions of electric responses in the visual system. We present... |
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| SubjectTerms | Animals Bees Biological and medical sciences Color vision Electrophysiology Experimental automation Fundamental and applied biological sciences. Psychology General aspects and techniques. Study of several systematic groups. Models Insect Invertebrates Miscellaneous techniques Photoreceptor Cells - physiology Sensitivity and Specificity Spectral sensitivity Techniques Visual Cortex - physiology |
| Title | An AC constant-response method for electrophysiological measurements of spectral sensitivity functions |
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