| 1. |
- Fredriksson, Anders, et al.
(författare)
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Running wheel activity restores MPTP-induced functional deficits
- 2011
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Ingår i: Journal of neural transmission. - Wien : Springer Science and Business Media LLC. - 0300-9564 .- 1435-1463. ; 118:3, s. 407-420
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Tidskriftsartikel (refereegranskat)abstract
- Wheel-running and treadmill running physical exercise have been shown to alleviate parkinsonism in both laboratory and clinical studies. MPTP was administered to C57/BL6 mice using two different procedures: (a) administration of a double-dose regime (MPTP 2 × 20 or 2 × 40 mg/kg, separated by a 24-h interval), vehicle (saline 5 ml/kg) or saline (vehicle 2 × 5 ml/kg), and (b) administration of a single-dose weekly regime (MPTP 1 × 40 mg/kg) or saline (vehicle 1 × 5 ml/kg) repeated over 4 consecutive weeks. For each procedure, two different physical exercise regimes were followed: (a) after the double-dose MPTP regime, mice were given daily 30-min periods of wheel-running exercise over 5 consecutive days/week or placed in a cage in close proximity to the running wheels for 3 weeks. (b) Mice were either given wheel-running activity on 4 consecutive days (30-min periods) or placed in a cage nearby for 14 weeks. Behavioral testing was as follows: (a) after 3 weeks of exercise/no exercise, mice were tested for spontaneous motor activity (60 min) and subthreshold l-Dopa (5 mg/kg)-induced activity. (b) Spontaneous motor activity was measured on the fifth day during each of the each of the first 5 weeks (Tests 1–5), about 1 h before injections (first 4 weeks), and continued on the 5th days of the 6th to the 14th weeks (Tests 6–14). Subthreshold l-Dopa (5 mg/kg)-induced activity was tested on the 6th, 8th, 10th, 12th and 14th weeks. (b) Mice from the single-dose MPTP weekly regime were killed during the 15th week and striatal regions taken for dopamine analysis, whereas frontal and parietal cortex and hippocampus were taken for analysis of brain-derived neurotrophic factor (BDNF). It was shown that in both experiments, i.e., the double-dose regime and single-dose weekly regime of MPTP administration, physical activity attenuated markedly the MPTP-induced akinesia/hypokinesia in both the spontaneous motor activity and restored motor activity completely in subthreshold l-Dopa tests. Running wheel activity attenuated markedly the loss of dopamine due to repeated administrations of MPTP. BDNF protein level in the parietal cortex was elevated by the MPTP insult and increased further by physical exercise. Physical running wheel exercise alleviated both the functional and biomarker expressions of MPTP-induced parkinsonism.
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| 3. |
- Garcia, Danilo, 1973, et al.
(författare)
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The Dark Side of the Affective Profiles: Differences and Similarities in Psychopathy, Machiavellianism, and Narcissism
- 2015
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Ingår i: Sage Open. - : SAGE Publications. - 2158-2440. ; 5:4, s. 1-14
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Tidskriftsartikel (refereegranskat)abstract
- The affective profiles model is based on the combination of individuals’ experience of high/low positive affect and high/low negative affect: self-fulfilling, high affective, low affective, and self-destructive. We used the profiles as the backdrop for the investigation of individual differences in malevolent character traits (i.e., the Dark Triad: psychopathy, Machiavellianism, and narcissism). A total of 1,000 participants (age: M = 31.50 SD = 10.27, 667 males and 333 females), recruited through Amazons’ Mechanical Turk (MTurk), responded to the Positive Affect Negative Affect Schedule and the Dark Triad Dirty Dozen. Individuals with a high affective profile reported higher degree of narcissism than those with any other profile, and together with individuals with a self-destructive profile, also higher degree of Machiavellianism and psychopathy than individuals with a low affective and self-fulfilling profile. Males scored higher in Machiavellianism and psychopathy. Together with earlier findings, our results show that while individuals in both the self-fulfilling and high affective profiles are extrovert and self-directed, only those in the high affective profile express an immature and malevolent character (i.e., high levels of all Dark Triad traits). Conversely, individuals in the self-fulfilling profile have earlier reported higher levels of cooperativeness and faith. More importantly, the unique association between high levels of positive emotions and narcissism and the unified association between negative emotions to both psychopathy and Machiavellianism imply a dyad rather than a triad of malevolent character traits.
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| 4. |
- Garcia, Danilo, 1973, et al.
(författare)
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Two different approaches to the affective profiles model : median splits (variable-oriented) and cluster analysis (person-oriented)
- 2015
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Ingår i: PeerJ. - : PeerJ Inc.. - 2167-8359. ; 3
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Tidskriftsartikel (refereegranskat)abstract
- Background: The notion of the affective system as being composed of two dimensions led Archer and colleagues to the development of the affective profiles model. The model consists of four different profiles based on combinations of individuals' experience of high/low positive and negative affect: self-fulfilling, low affective, high affective, and self-destructive. During the past 10 years, an increasing number of studies have used this person-centered model as the backdrop for the investigation of between and within individual differences in ill-being and well-being. The most common approach to this profiling is by dividing individuals' scores of self-reported affect using the median of the population as reference for high/low splits. However, scores just-above and just-below the median might become high and low by arbitrariness, not by reality. Thus, it is plausible to criticize the validity of this variable-oriented approach. Our aim was to compare the median splits approach with a person-oriented approach, namely, cluster analysis.Method: The participants (N = 2,225) were recruited through Amazons'Mechanical Turk and asked to self-report affect using the Positive Affect Negative Affect Schedule. We compared the profiles' homogeneity and Silhouette coefficients to discern differences in homogeneity and heterogeneity between approaches. We also conducted exact cell-wise analyses matching the profiles from both approaches and matching profiles and gender to investigate profiling agreement with respect to affectivity levels and affectivity and gender. All analyses were conducted using the ROPstat software.Results: The cluster approach (weighted average of cluster homogeneity coefficients = 0.62, Silhouette coefficients = 0.68) generated profiles with greater homogeneity and more distinctive from each other compared to the median splits approach (weighted average of cluster homogeneity coefficients = 0.75, Silhouette coefficients = 0.59). Most of the participants (n = 1,736, 78.0%) were allocated to the same profile (Rand Index =.83), however, 489 (21.98%) were allocated to different profiles depending on the approach. Both approaches allocated females and males similarly in three of the four profiles. Only the cluster analysis approach classified men significantly more often than chance to a self-fulfilling profile (type) and females less often than chance to this very same profile (antitype).Conclusions: Although the question whether one approach is more appropriate than the other is still without answer, the cluster method allocated individuals to profiles that are more in accordance with the conceptual basis of the model and also to expected gender differences. More importantly, regardless of the approach, our findings suggest that the model mirrors a complex and dynamic adaptive system.
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| 5. |
- Helldin, Lars, et al.
(författare)
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Experience of quality of life and attitude to care and treatment in patients with schizophrenia : Role of cross-sectional remission
- 2008
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Ingår i: International journal of psychiatry in clinical practice (Print). - : Informa UK Limited. - 1365-1501 .- 1471-1788. ; 12:2, s. 97-104
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Tidskriftsartikel (refereegranskat)abstract
- Objective The concept of cross-sectional remission was investigated in a sample of patients with schizophrenia. A total of 243 patients were tested for quality of life, burden and handicap, insight and satisfaction with the care provided in an epidemiological study. The question addressed was if remission is of importance for outcome. Methods Cross-sectional remission was defined by applying the symptom criteria of remission, where none of eight selected PANSS items should exceed 3 points. Out of 243 patients, 38% were in met cross-sectional remission. Quality of life was assessed with the MOS SF-36 and the Rosser Index. The Patients' understanding of their illness was assessed based on symptoms and disorder insight. Finally, attitudes to care and, health service were assessed by the UKU/Consumer Satisfaction Questionnaire and the Drug Attitude Inventory. Results Patients who were in cross-sectional remission reported higher quality of life and reduced burden related to the disorder, a greater level of insight into their symptoms and the illness, and a more positive attitude to treatment, including drugs. Conclusion This study implies that remission, here expressed in terms of cross-sectional remission, is of importance for patients' well-being. Patients who had no interference from symptoms in their daily functioning found their life better, had a superior insight and were more positive to treatment.
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| 7. |
- Jimmefors, Alexander, et al.
(författare)
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Locomotion (Empowering) and Assessment (Disempowering) Self-regulatory Dimensions as a Function of Affective Profile in High School Students.
- 2014
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Ingår i: International Journal of School and Cognitive Psychology. - : OMICS Publishing Group. - 2469-9837. ; 2:1
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Tidskriftsartikel (refereegranskat)abstract
- The purpose of the present study was to examine high school adolescent pupils’ self-regulatory strategies in relation to psychological well-being and subjective well-being (i.e., temporal life satisfaction and affect) using the affective profiles model as the backdrop for the analysis. Participants were categorized into Self-fulfilling (high positive, low negative), High affective (high positive, high negative), Low affective (low positive, low negative) and Self-destructive (low positive, high negative) profiles according to their responses on the Positive Affect and Negative Affect Schedule. The participants also self-reported self-regulation (“assessment” and “locomotion”),temporal life satisfaction (past, present and future) and psychological well-being (e.g. Self-acceptance,environmental mastery, personal growth). Self-fulfilling adolescents, in contrast to Self-destructive adolescents, expressed high levels of temporal life satisfaction and psychological well-being. The self-regulatory “locomotion” dimension was associated to high positive affect profiles, higher life satisfaction and psychological well-being whereas the self-regulatory “assessment” dimension was associated with high negative affect profiles, lesser life satisfaction and psychological well-being. Taken together, the well-being outcomes linked to the “locomotion” dimension seem to contribute to an upward ‘spiral of empowerment’, reinforcing approaching or agentic behavior; while the outcome linked to the “assessment” dimension appear to consist of a downward ‘spiral of disempowerment’ or inaction.
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| 8. |
- Karilampi, Ulla, et al.
(författare)
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Verbal learning in schizopsychotic outpatients and healthy volunteers as a function of cognitive performance levels
- 2007
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Ingår i: Archives of clinical neuropsychology. - : Oxford University Press (OUP). - 0887-6177 .- 1873-5843. ; 22:2, s. 161-174
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE The aim was to analyze and compare neurocognitive test profiles related to different levels of verbal learning performance among schizopsychotic patients and healthy volunteers. METHOD A single-center patient cohort of 196 participants was compared with an equal-sized volunteer group to form three cognitive subgroups based on the shared verbal learning performance. RESULTS 43.9% of the patients had normal learning ability. Despite this, all patients underperformed the volunteers on all subtests with the exception of working memory, and, for those with high learning ability, even verbal facility. All patients also presented equally poor visuomotor processing speed/efficacy. CONCLUSION A global neurocognitive retardation of speed-related processing in schizophrenia is suggested.
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| 9. |
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| 10. |
- Mousavi, Fariba, et al.
(författare)
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Swedish high-school pupils’ attitudes towards drugs in relation to drug usage, impulsiveness and other risk factors
- 2014
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Ingår i: PeerJ. - : PeerJ. - 2167-8359. ; 2, s. e410-
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Tidskriftsartikel (refereegranskat)abstract
- Background. Illicit drug use influences people’s lives and elicits unwanted behaviour. Current research shows that there is an increase in young people’s drug use in Sweden. The aim was to investigate Swedish high-school pupils’ attitudes, impulsiveness and gender differences linked to drug use. Risk and protective factors relative to drug use were also a focus of interest.Method. High school pupils (n = 146) aged 17–21 years, responded to the Adolescent Health and Development Inventory, Barratt Impulsiveness Scale and Knowledge, and the Attitudes and Beliefs. Direct logistic, multiple regression analyses, and Multivariate Analysis of Variance were used to analyze the data.Results. Positive Attitudes towards drugs were predicted by risk factors (odds ratio = 37.31) and gender (odds ratio = .32). Risk factors (odds ratio = 46.89), positive attitudes towards drugs (odds ratio = 4.63), and impulsiveness (odds ratio = 1.11) predicted drug usage. Risk factors dimensions Family, Friends and Individual Characteristic were positively related to impulsiveness among drug users. Moreover, although boys reported using drugs to a greater extent, girls expressed more positive attitude towards drugs and even reported more impulsiveness than boys.Conclusion. This study reinforces the notion that research ought to focus on gender differences relative to pro-drug attitudes along with testing for differences in the predictors of girls’ and boys’ delinquency and impulsiveness. Positive attitudes towards drugs among adolescents seem to be part of a vicious circle including risk factors, such as friendly drug environments (e.g., friends who use drugs) and unsupportive family environments, individual characteristics, and impulsiveness.
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