Power spectrum scale invariance identifies prefrontal dysregulation in paranoid schizophrenia
Theory and experimental evidence suggest that complex living systems function close to the boundary of chaos, with erroneous organization to an improper dynamical range (too stiff or chaotic) underlying system‐wide dysregulation and disease. We hypothesized that erroneous organization might therefor...
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| Published in | Human brain mapping Vol. 33; no. 7; pp. 1582 - 1593 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
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Hoboken
Wiley Subscription Services, Inc., A Wiley Company
01.07.2012
Wiley-Liss John Wiley & Sons, Inc |
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| Abstract | Theory and experimental evidence suggest that complex living systems function close to the boundary of chaos, with erroneous organization to an improper dynamical range (too stiff or chaotic) underlying system‐wide dysregulation and disease. We hypothesized that erroneous organization might therefore also characterize paranoid schizophrenia, via optimization abnormalities in the prefrontal‐limbic circuit regulating emotion. To test this, we acquired fMRI scans from 35 subjects (N = 9 patients with paranoid schizophrenia and N = 26 healthy controls), while they viewed affect‐valent stimuli. To quantify dynamic regulation, we analyzed the power spectrum scale invariance (PSSI) of fMRI time‐courses and computed the geometry of time‐delay (Poincaré) maps, a measure of variability. Patients and controls showed distinct PSSI in two clusters (k1: Z = 4.3215, P = 0.00002 and k2: Z = 3.9441, P = 0.00008), localized to the orbitofrontal/medial prefrontal cortex (Brodmann Area 10), represented by β close to white noise in patients (β ≈ 0) and in the pink noise range in controls (β ≈ −1). Interpreting the meaning of PSSI differences, the Poincaré maps indicated less variability in patients than controls (Z = −1.9437, P = 0.05 for k1; Z = −2.5099, P = 0.01 for k2). That the dynamics identified Brodmann Area 10 is consistent with previous schizophrenia research, which implicates this area in deficits of working memory, executive functioning, emotional regulation and underlying biological abnormalities in synaptic (glutamatergic) transmission. Our results additionally cohere with a large body of work finding pink noise to be the normal range of central function at the synaptic, cellular, and small network levels, and suggest that patients show less supple responsivity of this region. Hum Brain Mapp, 2011. © 2011 Wiley‐Liss, Inc. |
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| AbstractList | Theory and experimental evidence suggest that complex living systems function close to the boundary of chaos, with erroneous organization to an improper dynamical range (too stiff or chaotic) underlying system-wide dysregulation and disease. We hypothesized that erroneous organization might therefore also characterize paranoid schizophrenia, via optimization abnormalities in the prefrontal-limbic circuit regulating emotion. To test this, we acquired fMRI scans from 35 subjects (N = 9 patients with paranoid schizophrenia and N = 26 healthy controls), while they viewed affect-valent stimuli. To quantify dynamic regulation, we analyzed the power spectrum scale invariance (PSSI) of fMRI time-courses and computed the geometry of time-delay (Poincaré) maps, a measure of variability. Patients and controls showed distinct PSSI in two clusters (k(1) : Z = 4.3215, P = 0.00002 and k(2) : Z = 3.9441, P = 0.00008), localized to the orbitofrontal/medial prefrontal cortex (Brodmann Area 10), represented by β close to white noise in patients (β ≈ 0) and in the pink noise range in controls (β ≈ -1). Interpreting the meaning of PSSI differences, the Poincaré maps indicated less variability in patients than controls (Z = -1.9437, P = 0.05 for k(1) ; Z = -2.5099, P = 0.01 for k(2) ). That the dynamics identified Brodmann Area 10 is consistent with previous schizophrenia research, which implicates this area in deficits of working memory, executive functioning, emotional regulation and underlying biological abnormalities in synaptic (glutamatergic) transmission. Our results additionally cohere with a large body of work finding pink noise to be the normal range of central function at the synaptic, cellular, and small network levels, and suggest that patients show less supple responsivity of this region.Theory and experimental evidence suggest that complex living systems function close to the boundary of chaos, with erroneous organization to an improper dynamical range (too stiff or chaotic) underlying system-wide dysregulation and disease. We hypothesized that erroneous organization might therefore also characterize paranoid schizophrenia, via optimization abnormalities in the prefrontal-limbic circuit regulating emotion. To test this, we acquired fMRI scans from 35 subjects (N = 9 patients with paranoid schizophrenia and N = 26 healthy controls), while they viewed affect-valent stimuli. To quantify dynamic regulation, we analyzed the power spectrum scale invariance (PSSI) of fMRI time-courses and computed the geometry of time-delay (Poincaré) maps, a measure of variability. Patients and controls showed distinct PSSI in two clusters (k(1) : Z = 4.3215, P = 0.00002 and k(2) : Z = 3.9441, P = 0.00008), localized to the orbitofrontal/medial prefrontal cortex (Brodmann Area 10), represented by β close to white noise in patients (β ≈ 0) and in the pink noise range in controls (β ≈ -1). Interpreting the meaning of PSSI differences, the Poincaré maps indicated less variability in patients than controls (Z = -1.9437, P = 0.05 for k(1) ; Z = -2.5099, P = 0.01 for k(2) ). That the dynamics identified Brodmann Area 10 is consistent with previous schizophrenia research, which implicates this area in deficits of working memory, executive functioning, emotional regulation and underlying biological abnormalities in synaptic (glutamatergic) transmission. Our results additionally cohere with a large body of work finding pink noise to be the normal range of central function at the synaptic, cellular, and small network levels, and suggest that patients show less supple responsivity of this region. Theory and experimental evidence suggest that complex living systems function close to the boundary of chaos, with erroneous organization to an improper dynamical range (too stiff or chaotic) underlying system-wide dysregulation and disease. We hypothesized that erroneous organization might therefore also characterize paranoid schizophrenia, via optimization abnormalities in the prefrontal-limbic circuit regulating emotion. To test this, we acquired fMRI scans from 35 subjects (N = 9 patients with paranoid schizophrenia and N = 26 healthy controls), while they viewed affect-valent stimuli. To quantify dynamic regulation, we analyzed the power spectrum scale invariance (PSSI) of fMRI time-courses and computed the geometry of time-delay (Poincaré) maps, a measure of variability. Patients and controls showed distinct PSSI in two clusters (k1: Z = 4.3215, P = 0.00002 and k2: Z = 3.9441, P = 0.00008), localized to the orbitofrontal/medial prefrontal cortex (Brodmann Area 10), represented by [beta] close to white noise in patients ([beta] [asymptotically =] 0) and in the pink noise range in controls ([beta] [asymptotically =] -1). Interpreting the meaning of PSSI differences, the Poincaré maps indicated less variability in patients than controls (Z = -1.9437, P = 0.05 for k1; Z = -2.5099, P = 0.01 for k2). That the dynamics identified Brodmann Area 10 is consistent with previous schizophrenia research, which implicates this area in deficits of working memory, executive functioning, emotional regulation and underlying biological abnormalities in synaptic (glutamatergic) transmission. Our results additionally cohere with a large body of work finding pink noise to be the normal range of central function at the synaptic, cellular, and small network levels, and suggest that patients show less supple responsivity of this region. Hum Brain Mapp, 2011. © 2011 Wiley-Liss, Inc. [PUBLICATION ABSTRACT] Theory and experimental evidence suggest that complex living systems function close to the boundary of chaos, with erroneous organization to an improper dynamical range (too stiff or chaotic) underlying system‐wide dysregulation and disease. We hypothesized that erroneous organization might therefore also characterize paranoid schizophrenia, via optimization abnormalities in the prefrontal‐limbic circuit regulating emotion. To test this, we acquired fMRI scans from 35 subjects ( N = 9 patients with paranoid schizophrenia and N = 26 healthy controls), while they viewed affect‐valent stimuli. To quantify dynamic regulation, we analyzed the power spectrum scale invariance (PSSI) of fMRI time‐courses and computed the geometry of time‐delay (Poincaré) maps, a measure of variability. Patients and controls showed distinct PSSI in two clusters ( k 1 : Z = 4.3215, P = 0.00002 and k 2 : Z = 3.9441, P = 0.00008), localized to the orbitofrontal/medial prefrontal cortex (Brodmann Area 10), represented by β close to white noise in patients (β ≈ 0) and in the pink noise range in controls (β ≈ −1). Interpreting the meaning of PSSI differences, the Poincaré maps indicated less variability in patients than controls ( Z = −1.9437, P = 0.05 for k 1 ; Z = −2.5099, P = 0.01 for k 2 ). That the dynamics identified Brodmann Area 10 is consistent with previous schizophrenia research, which implicates this area in deficits of working memory, executive functioning, emotional regulation and underlying biological abnormalities in synaptic (glutamatergic) transmission. Our results additionally cohere with a large body of work finding pink noise to be the normal range of central function at the synaptic, cellular, and small network levels, and suggest that patients show less supple responsivity of this region. Hum Brain Mapp, 2011. © 2011 Wiley‐Liss, Inc. Theory and experimental evidence suggest that complex living systems function close to the boundary of chaos, with erroneous organization to an improper dynamical range (too stiff or chaotic) underlying system‐wide dysregulation and disease. We hypothesized that erroneous organization might therefore also characterize paranoid schizophrenia, via optimization abnormalities in the prefrontal‐limbic circuit regulating emotion. To test this, we acquired fMRI scans from 35 subjects (N = 9 patients with paranoid schizophrenia and N = 26 healthy controls), while they viewed affect‐valent stimuli. To quantify dynamic regulation, we analyzed the power spectrum scale invariance (PSSI) of fMRI time‐courses and computed the geometry of time‐delay (Poincaré) maps, a measure of variability. Patients and controls showed distinct PSSI in two clusters (k1: Z = 4.3215, P = 0.00002 and k2: Z = 3.9441, P = 0.00008), localized to the orbitofrontal/medial prefrontal cortex (Brodmann Area 10), represented by β close to white noise in patients (β ≈ 0) and in the pink noise range in controls (β ≈ −1). Interpreting the meaning of PSSI differences, the Poincaré maps indicated less variability in patients than controls (Z = −1.9437, P = 0.05 for k1; Z = −2.5099, P = 0.01 for k2). That the dynamics identified Brodmann Area 10 is consistent with previous schizophrenia research, which implicates this area in deficits of working memory, executive functioning, emotional regulation and underlying biological abnormalities in synaptic (glutamatergic) transmission. Our results additionally cohere with a large body of work finding pink noise to be the normal range of central function at the synaptic, cellular, and small network levels, and suggest that patients show less supple responsivity of this region. Hum Brain Mapp, 2011. © 2011 Wiley‐Liss, Inc. Theory and experimental evidence suggest that complex living systems function close to the boundary of chaos, with erroneous organization to an improper dynamical range (too stiff or chaotic) underlying system-wide dysregulation and disease. We hypothesized that erroneous organization might therefore also characterize paranoid schizophrenia, via optimization abnormalities in the prefrontal-limbic circuit regulating emotion. To test this, we acquired fMRI scans from 35 subjects (N = 9 patients with paranoid schizophrenia and N = 26 healthy controls), while they viewed affect-valent stimuli. To quantify dynamic regulation, we analyzed the power spectrum scale invariance (PSSI) of fMRI time-courses and computed the geometry of time-delay (Poincaré) maps, a measure of variability. Patients and controls showed distinct PSSI in two clusters (k(1) : Z = 4.3215, P = 0.00002 and k(2) : Z = 3.9441, P = 0.00008), localized to the orbitofrontal/medial prefrontal cortex (Brodmann Area 10), represented by β close to white noise in patients (β ≈ 0) and in the pink noise range in controls (β ≈ -1). Interpreting the meaning of PSSI differences, the Poincaré maps indicated less variability in patients than controls (Z = -1.9437, P = 0.05 for k(1) ; Z = -2.5099, P = 0.01 for k(2) ). That the dynamics identified Brodmann Area 10 is consistent with previous schizophrenia research, which implicates this area in deficits of working memory, executive functioning, emotional regulation and underlying biological abnormalities in synaptic (glutamatergic) transmission. Our results additionally cohere with a large body of work finding pink noise to be the normal range of central function at the synaptic, cellular, and small network levels, and suggest that patients show less supple responsivity of this region. |
| Author | Rubin, Denis Mujica-Parodi, Lilianne R. Strey, Helmut H. Radulescu, Anca R. |
| AuthorAffiliation | 2 Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, New York 11794‐3690 1 Department of Biomedical Engineering, Stony Brook University School of Medicine, Stony Brook, New York 11794‐5281 3 Department of Psychiatry, Stony Brook University School of Medicine, Stony Brook, New York 11794‐8101 |
| AuthorAffiliation_xml | – name: 2 Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, New York 11794‐3690 – name: 3 Department of Psychiatry, Stony Brook University School of Medicine, Stony Brook, New York 11794‐8101 – name: 1 Department of Biomedical Engineering, Stony Brook University School of Medicine, Stony Brook, New York 11794‐5281 |
| Author_xml | – sequence: 1 givenname: Anca R. surname: Radulescu fullname: Radulescu, Anca R. organization: Department of Biomedical Engineering, Stony Brook University School of Medicine, Stony Brook, New York 11794-5281 – sequence: 2 givenname: Denis surname: Rubin fullname: Rubin, Denis organization: Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, New York 11794-3690 – sequence: 3 givenname: Helmut H. surname: Strey fullname: Strey, Helmut H. organization: Department of Biomedical Engineering, Stony Brook University School of Medicine, Stony Brook, New York 11794-5281 – sequence: 4 givenname: Lilianne R. surname: Mujica-Parodi fullname: Mujica-Parodi, Lilianne R. email: lmujicaparodi@gmail.com organization: Department of Biomedical Engineering, Stony Brook University School of Medicine, Stony Brook, New York 11794-5281 |
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Achermann P, K 2002; 17 2002; 15 2002; 52 2010; 18 2005; 134 2002; 13 2004; 161 1976 2003; 58 2001; 48 1996; 70 2003; 94 1998; 275 1974; 19 1996; 34 2003; 12 2007; 28 2001; 410 1974; 45 2006; 63 2009; 51 2000 1997; 96 2000; 57 1993; 70 2008; 29 1999; 14 2000; 97 1997; 56 2009; 166 2007; 3 1998; 95 2001; 56 2003; 41 2007; 27 2004; 101 2004; 43 1995; 52 2006; 97 1996; 19 2005; 112 2002; 7 1999; 68 2007 2006 1999; 21 2008; 57 1993 2008; 99 2002 1996; 91 2001; 22 2008; 50 2008; 165 1998; 134 2007; 57 1995; 5 1994; 43 2001; 21 2004; 98 2010; 44 2009; 35 2007; 118 2009; 30 2005; 162 1963; 11 1997; 71 1997; 37 2002; 23 2005; 51 2000; 140 1988; 23 2008; 46 1999; 76 2009; 5 1996; 153 2008; 212 2009; 4 2008; 254 2003; 62 2010; 50 2003; 23 1998; 79 e_1_2_7_3_1 e_1_2_7_9_1 e_1_2_7_7_1 e_1_2_7_60_1 e_1_2_7_83_1 Olney JW (e_1_2_7_65_1) 1994; 43 e_1_2_7_17_1 e_1_2_7_62_1 e_1_2_7_81_1 e_1_2_7_15_1 e_1_2_7_41_1 e_1_2_7_64_1 e_1_2_7_13_1 e_1_2_7_43_1 e_1_2_7_66_1 e_1_2_7_85_1 e_1_2_7_11_1 e_1_2_7_45_1 e_1_2_7_68_1 e_1_2_7_47_1 e_1_2_7_89_1 e_1_2_7_26_1 e_1_2_7_49_1 e_1_2_7_28_1 e_1_2_7_90_1 Doble M (e_1_2_7_23_1) 2007; 3 e_1_2_7_73_1 e_1_2_7_50_1 e_1_2_7_71_1 e_1_2_7_92_1 Kauffman SA (e_1_2_7_40_1) 1993 e_1_2_7_25_1 e_1_2_7_31_1 e_1_2_7_52_1 e_1_2_7_77_1 e_1_2_7_33_1 e_1_2_7_54_1 e_1_2_7_75_1 e_1_2_7_21_1 e_1_2_7_35_1 e_1_2_7_56_1 e_1_2_7_37_1 e_1_2_7_58_1 e_1_2_7_79_1 e_1_2_7_39_1 e_1_2_7_6_1 e_1_2_7_4_1 e_1_2_7_80_1 e_1_2_7_8_1 e_1_2_7_18_1 e_1_2_7_84_1 e_1_2_7_16_1 Cordes D (e_1_2_7_22_1) 2001; 22 e_1_2_7_61_1 e_1_2_7_82_1 e_1_2_7_2_1 e_1_2_7_14_1 e_1_2_7_42_1 e_1_2_7_63_1 e_1_2_7_88_1 e_1_2_7_12_1 e_1_2_7_44_1 e_1_2_7_86_1 e_1_2_7_10_1 e_1_2_7_46_1 e_1_2_7_67_1 e_1_2_7_48_1 e_1_2_7_69_1 e_1_2_7_29_1 American Psychiatric Association (e_1_2_7_5_1) 2000 Ward L (e_1_2_7_87_1) 2002 e_1_2_7_91_1 e_1_2_7_72_1 e_1_2_7_51_1 e_1_2_7_70_1 First MB (e_1_2_7_27_1) 2002 e_1_2_7_30_1 e_1_2_7_53_1 e_1_2_7_76_1 e_1_2_7_24_1 e_1_2_7_32_1 e_1_2_7_55_1 e_1_2_7_74_1 Cohen H (e_1_2_7_19_1) 1998; 134 e_1_2_7_34_1 e_1_2_7_57_1 e_1_2_7_20_1 e_1_2_7_36_1 e_1_2_7_59_1 e_1_2_7_78_1 e_1_2_7_38_1 |
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| Title | Power spectrum scale invariance identifies prefrontal dysregulation in paranoid schizophrenia |
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