zero-phase bandpass butterworth filter Search Results


10-500 hz fourth-order zero-phase butterworth filter  (MathWorks Inc)
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MathWorks Inc 10-500 hz fourth-order zero-phase butterworth filter
10 500 Hz Fourth Order Zero Phase Butterworth Filter, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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10-500 hz fourth-order zero-phase butterworth filter - by Bioz Stars, 2026-03
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butterworth zero-phase filter  (MathWorks Inc)
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MathWorks Inc butterworth zero-phase filter
( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to <t>Butterworth</t> filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007
Butterworth Zero Phase Filter, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/butterworth zero-phase filter/product/MathWorks Inc
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butterworth zero-phase filter - by Bioz Stars, 2026-03
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fourth-order zero phase butterworth low-pass digital filter  (MathWorks Inc)
90
MathWorks Inc fourth-order zero phase butterworth low-pass digital filter
( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to <t>Butterworth</t> filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007
Fourth Order Zero Phase Butterworth Low Pass Digital Filter, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/fourth-order zero phase butterworth low-pass digital filter/product/MathWorks Inc
Average 90 stars, based on 1 article reviews
fourth-order zero phase butterworth low-pass digital filter - by Bioz Stars, 2026-03
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4th order zero-phase butterworth filter matlab filtfilt  (MathWorks Inc)
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MathWorks Inc 4th order zero-phase butterworth filter matlab filtfilt
( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to <t>Butterworth</t> filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007
4th Order Zero Phase Butterworth Filter Matlab Filtfilt, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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6th order zero-phase butterworth infinite impulse response (iir) band-pass filter  (MathWorks Inc)
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MathWorks Inc 6th order zero-phase butterworth infinite impulse response (iir) band-pass filter
( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to <t>Butterworth</t> filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007
6th Order Zero Phase Butterworth Infinite Impulse Response (Iir) Band Pass Filter, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
https://www.bioz.com/result/6th order zero-phase butterworth infinite impulse response (iir) band-pass filter/product/MathWorks Inc
Average 90 stars, based on 1 article reviews
6th order zero-phase butterworth infinite impulse response (iir) band-pass filter - by Bioz Stars, 2026-03
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digital filters  (MathWorks Inc)
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MathWorks Inc digital filters
( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to <t>Butterworth</t> filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007
Digital Filters, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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digital filters - by Bioz Stars, 2026-03
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zero-phase 4th order butterworth iir filter  (MathWorks Inc)
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MathWorks Inc zero-phase 4th order butterworth iir filter
( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to <t>Butterworth</t> filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007
Zero Phase 4th Order Butterworth Iir Filter, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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zero-phase 4th order butterworth iir filter - by Bioz Stars, 2026-03
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fourth-order zero-phase shift butterworth filter  (MathWorks Inc)
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MathWorks Inc fourth-order zero-phase shift butterworth filter
( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to <t>Butterworth</t> filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007
Fourth Order Zero Phase Shift Butterworth Filter, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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third-order zero-phase-lag butterworth filter  (MathWorks Inc)
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MathWorks Inc third-order zero-phase-lag butterworth filter
( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to <t>Butterworth</t> filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007
Third Order Zero Phase Lag Butterworth Filter, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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3 rd order zero-phase butterworth filter  (MathWorks Inc)
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MathWorks Inc 3 rd order zero-phase butterworth filter
( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to <t>Butterworth</t> filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007
3 Rd Order Zero Phase Butterworth Filter, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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zero phase shift butterworth filters  (Brainvision Inc)
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Brainvision Inc zero phase shift butterworth filters
( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to <t>Butterworth</t> filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007
Zero Phase Shift Butterworth Filters, supplied by Brainvision Inc, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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zero phase shift butterworth filters - by Bioz Stars, 2026-03
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matlab version 6.5  (MathWorks Inc)
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MathWorks Inc matlab version 6.5
( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to <t>Butterworth</t> filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007
Matlab Version 6.5, supplied by MathWorks Inc, used in various techniques. Bioz Stars score: 90/100, based on 1 PubMed citations. ZERO BIAS - scores, article reviews, protocol conditions and more
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Image Search Results


( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to Butterworth filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007

Journal: eLife

Article Title: A highly tunable dopaminergic oscillator generates ultradian rhythms of behavioral arousal

doi: 10.7554/eLife.05105

Figure Lengend Snippet: ( A and B ) Ambulatory activity recorded by telemetry implants across multiple days (left) and averaged over 24 hr (right). Traces represent 2-hr recursive smoothing (black) of the underlying raw DATa (dark grey; SEM envelope, light grey). Areas in yellow indicate lights on. ( C ) Amplitude spectral density in the ultradian range (2–8 hr) is significantly different between Slc6a3 −/− mice and their wildtype littermates revealing a loss of the ultradian component (mean ± SEM; N = 10; F 1,18 = 26.40, **p < 0.0001, ANOVA). ( D ) Although the temporal pattern of locomotion differs between genotypes there is no significant difference in daily activity averaged over multiple days (mean ± SEM; N = 10, F 1,18 = 0.1793, ANOVA). ( E – G ) Addition of Meth to the drinking water of C57BL/6 mice lengthens the night-time activity bouts in a concentration-dependent manner. Averaged daily locomotor activity of individual mice at different Meth concentrations ( G ) derived from the time-span indicated by colored bars next to the representative actogram ( F ) and subjected to Butterworth filtering. The three night-time activity peaks before treatment (white triangles), transform to 2 peaks after exposure to the highest concentration (black triangles). The night-time bout lengthening is also reflected in the reduction of ultradian amplitude spectral density in the 1 to 5-hr range ( E , mean ± SEM, N = 7; F 2,20 = 8.08, p < 0.005, repeated measures ANOVA; *p < 0.05, **p < 0.01, post-hoc Bonferroni). White asterisks (in E ) indicate cage changes. DOI: http://dx.doi.org/10.7554/eLife.05105.007

Article Snippet: Low pass filtering (1-hr cut-off) of raw data was conducted using a Butterworth zero-phase filter ( ) in Matlab.

Techniques: Activity Assay, Concentration Assay, Derivative Assay