Psykologisk forskning med fokus på hjärnan
Psychological research focused on the brain.

Research themes

In the Fischer Lab we study different aspects of emotional, social, and cognitive information processing, and how age, gender, genetics, personality, and sleep deprivation affect these processes. In this research experimental psychological behavioral methodology is combined with brain activation techniques such as PET, Near-infrared spectroscopy (NIRS) and fMRI.

Read more about some of our research themes.

Primary investigator

Håkan Fischer, Professor of Human Biological Psychology
Tel: +46-8-16 23 57

Collaborators at the Department of Psychology

Collaborators at other institutions and departments

  • Rebecca Addo, PhD Student, Västmanland Hospital.
  • Gerhard Andersson, Professor, Linköping University.
  • Artin Arshamian, Researcher, Karolinska Institutet.
  • John Axelsson, Associate Professor, Karolinska Institutet.
  • Dr Elina Birmingham, Simon Frazer University, Canada.
  • Fredrik Björklund, Professor, Lund University.
  • Magnus Boman, professor, SICS, KTH.
  • Carl-Johan Boraxbekk, Researcher, Umeå University.
  • Yvonne Brehmer, Researcher, Karolinska Institutet.
  • Lars Bäckman, Professor, Karolinska Institutet.
  • Erik Dahlqvist, Sociotar AB.
  • Natalie Ebner, Researcher, University of Florida, USA.
  • John Edens, Professor, Texas A&M University, USA.
  • Tomas Furmark, Professor, Uppsala University.
  • Joachim Gavazzeni, Researcher, Karolinska Institutet.
  • Martin Gumpert, Sociotar AB.
  • Marie Gustafsson Sendén, Researcher, Södertörns högskola, Stockholm.
  • Agneta Herlitz, Professor, Karolinska Institutet.
  • Benjamin Holding, PhD Student, Karolinska Institutet.
  • Katarina Howner, Researcher, Karolinska Institutet.
  • Anette Johansson, Löwenströmska Hospital, Upplands Väsby.
  • Kristina Johnell, Associate Professor, Karolinska Institutet.
  • Tomas Jonsson, Researcher, Karolinska Institutet.
  • Gregoria Kalpouzos, Researcher, Karolinska Institutet.
  • Göran Kecklund, Associate Professor, Stockholm University.
  • Marianne Kristiansson, Professor, Karolinska Institutet.
  • Francisco Lacerda, Professor, Stockholm University.
  • Martin Larsson, PhD Student, Karolinska Institutet.
  • Catharina Lavebratt, Associate Professor, Karolinska Institutet.
  • Mats Lekander, Professor, Stockholm University.
  • Olof Lindberg, Researcher, Karolinska Institutet.
  • Daniel Lundqvist, Researcher, Karolinska Institutet.
  • Stuart MacDonald, Professor, University of Victoria, Canada.
  • Dr Irena Makower, Evidens AB.
  • Gustav Nilsonne, Postdoc, Stockholm University.
  • Kent Nilsson, Professor, Västmanland Hospital.
  • Lars Nyberg, Professor, Umeå University.
  • Tom Palmstierna, Associate Professor, Karolinska Institutet.
  • Jonas Person, Karolinska Institutet.
  • Ninni Persson, Researcher, Karolinska Institutet.
  • Predrag Petrovic, Karolinska Institutet.
  • Tie Qiang Li, Associate Professor, Karolinska Institutet.
  • Anna Rieckmann, Researcher, Umeå University.
  • Bart Rypma, Associate Professor, University of Texas at Dallas, USA.
  • Johanna Schwarz, Researcher, Stockholm University.
  • Sofia Sjöberg, Hogrefe Publishing.
  • Tina Sundelin, Researcher, Karolinska Institutet.
  • Joakim Svärd, Researcher, Karolinska Institutet.
  • Karolina Sörman, Postdoc, Karolinska Institutet.
  • Jari Tihonen, Professor, Karolinska Institutet.
  • Fredrik Ullén, Karolinska Institutet.
  • Lars-Olof Wahlund, Professor, Karolinska Institutet.
  • Hui-Xin Wang, Professor, Stressforskningsinstitutet, Stockholm University.
  • Katja Werheid, Professor, Humboldt Universität, Germany.
  • Lars Westberg, Researcher, Gothenburg University.
  • Maryam Ziaei, University of Queensland, Australia.
  • Torbjörn Åkerstedt, Professor Emeritus, Karolinska Institutet.
  • Cecilia Åslund, Researcher, Västmanland Hospital.


Conference presentations 2018

Månsson, K.N.T., Cortes, S.D., Lin, T., Fischer, H., & Ebner,  N.C. (2018). Neuroplasticity after acute and repeated exposure to oxytocin: a multi-site MRI analysis. OHBM Annual Meeting, Singapore. [Poster]

Fischer,  H., Cortes, D.S.,  Laukka, P., Månsson, K.N.T., & Ebner, N.C. (2018). Single-dose intranasal oxytocin administration is associated with larger amygdala grey matter volume in younger, but smaller volume in older adult. The 11th Annual Meeting of the Social & Affective Neuroscience Society, New York, USA. [Poster]

Cortes, D.S., Månsson, K.N.T., Laukka, P., Ebner, N.C., & Fischer, H. (2018). Single-dose intranasal oxytocin administration induces brain activity reductions to negative socioemotional stimuli in younger and older adults. The 11th Annual Meeting of the Social & Affective Neuroscience Society, New York, USA. [Poster]

Månsson, K.N.T., Wager, T.D., Isacsson,N., Kolbeinsson, Ö., Andersson, G., Fischer, H., & Furmark, T. (2018). Brain Before Behavior: Temporal dynamics in the treatment of social anxiety - Neural changes occur early and precede clinical improvement. The 11th Annual Meeting of the Social & Affective Neuroscience Society, New York, USA. [Poster]

Månsson,  K.N.T., Garrett, D., Wiegert, S., Manzouri, A., Furmark, T., & Fischer, H. (2018). Affective brain signal variability separates social anxiety disorder patients from healthy individuals. The 73rd Annual Meeting of the Society of Biological Psychiatry, New York, USA. [Poster]

Månsson,K.N.T., Lindqvist, D., Wolkowitz, O., Nilsonne, G., Isung, J., Svanborg, C., Yang, L., Boraxbekk, C.J., Fischer, H., Lavebratt, C., & Furmark, T. (2018). Can psychological treatment slow down cellular aging in social anxiety disorder? An intervention study evaluating changes in telomere length and telomerase activity. The 73rd Annual Meeting of the Society of Biological Psychiatry, New York, USA. [Poster]

Månsson, K.N.T., Wager, T.D., Isacsson,N., Kolbeinsson, Ö., Andersson, G., Fischer,H., & Furmark, T. (2018). Brain Before Behavior: Temporal dynamics in the treatment of social anxiety - Neural changes occur early and precede clinical improvement. The 73rd Annual Meeting of the Society of Biological Psychiatry, New York, USA. [Poster]

Cortes, D.S., Månsson, K.N.T., Laukka, P., Ebner, N.C., & Fischer, H. (2018). Single-dose intranasal oxytocin administration reduced brain activity to negative emotion displays in younger and older men and women. Consortium of European Research on Emotion (CERE), Glasgow (Scotland), April 4-5. [Poster]



Hovey, D., Henningsson, S., Cortes Sanchez, D., Bänziger, T., Zettergren, A., Melke, J., Fischer, H., Laukka, P., & Westberg, L. (Accepted). Emotion recognition associated with polymorphism in oxytocinergic pathway gene ARNT2. Social Cognitive and Affective Neuroscience. doi:10.1093/scan/nsx141

Åkerstedt, T., Lekander, M., Nilsonne, G., Tamm, S.,  d’Onofrio, P., Kecklund, G., Fischer, H., & Schwarz, J. (accepted). The effect of late night short sleep on polysomnography – the relation to age and gender. Journal of Sleep Research, 2017 Oct 30. doi: 10.1111/jsr.12626. [Epub ahead of print]

Holding, B., Laukka, P., Fischer, H., Bänziger, T., Axelsson, J., & Sundelin, T. (2017). Multimodal emotion recognition is resilient to insufficient sleep: Results from cross-sectional and experimental studies. Sleep, 40(11), zsx145. doi: 10.1093/sleep/zsx145.

Tamm, S., Nilsonne, G., Schwarz, J., Lamm, C., Kecklund, G., Petrovic, P., Fischer, H., Åkerstedt, T., & Lekander, M. (2017). The effect of sleep restriction on empathy for pain: An fMRI study in younger and older adults. Scientific Reports, 7:12236. doi:10.1038/s41598-017-12098-9.

Nilsonne, G., Tamm, S., Schwarz, J., Almeida, R., Fischer, H., Kecklund, G., Lekander, M., Fransson, P., & Åkerstedt, T. (2017). Intrinsic brain connectivity after partial sleep deprivation in young and older adults: Results from the Stockholm Sleepy Brain study. Scientific Reports, 7:9422. doi: 10.1038/s41598-017-09744-7

Persson, N., Lavebratt, C., Ebner, N.C., & Fischer, H. (2017). Influence of DARPP-32 gene variation on BOLD activation to happy faces. Social Cognitive and Affective Neuroscience, 12(10), 1658-1667. doi: 10.1093/scan/nsx089

Syrjänen, E., Liuzza, M.T., Fischer, H., & Olofsson, J.K. (2017). Do valenced odors and trait body odor disgust affect evaluation of emotion in dynamic faces? Perception, 46(12), 1412-1426. doi: 10.1177/0301006617720831

Lundqvist, D., Svärd, J., Michelgård Palmquist, Å., Fischer, H., & Svenningsson, P. (2017). Patients With Parkinson's Disease Display a Dopamine Therapy Related Negative Bias and an Enlarged Range in Emotional Responses to Facial Emotional Stimuli. Neuropsychology, 31(6), 605-612. doi: 10.1037/neu0000371

Cortes, D.S., Laukka, P., Lindahl, C., & Fischer, H. (2017). Memory for faces and voices varies as a function of sex and expressed emotion. PLOS ONE, 12(6): e0178423. doi: 10.1371/journal.pone.0178423

Persson, N., Persson, J., Lavebratt, C., & Fischer, H. (2017). Effects of DARPP-32 genetic variation on prefrontal cortex volume and episodic memory performance. Frontiers in Neuroscience, 11:244. doi: 10.3389/fnins.2017.00244

Schwarz, J.F.A., Åkerstedt, T., Lindberg, E., Gruber, G., Fischer, H., & Theorell-Hagloew, J. (2017). Age affects sleep microstructure more than sleep macrostructure. Journal of Sleep Research, 26(3), 277-287. doi: 10.1111/jsr.12478


Holding, J.B.C., Laukka, P., Fischer, H., Axelsson, J., Sundelin T. (2016). Total sleep deprivation does not impact emotion categorisation in dynamic stimuli. Journal of Sleep Research, 25, 152-152.

Gerhardsson, A., Åkerstedt, T., Axelsson, J., Fischer, H., Kecklund, G., Lekander, M., Schwarz. J. (2016). The effect of sleep loss on emotional working memory. Journal of Sleep Research, 25, 17-18.

Schwarz, J., Gerhardsson, A., Van Leeuwen, W., Fischer, H., Lekander, M., Kecklund, G., Axelsson, J., Akerstedt., T. (2016). The effect of sleep loss on the response to acute psychosocial stress in young and elderly. Journal of Sleep Research, 25, 48-48.

Åkerstedt, T., Lekander, M., Nilsonne, G., Fischer, H., Kecklund, G., d'Onofrio, P., Gruber, G., Schwarz, J. (2016). Women sleep better and have a stronger response to late night curtailed sleep than men, particularly in older individuals-effects on polysomnographical sleep. Journal of Sleep Research, 25, 156-156.

Westberg, L., Henningsson, S., Zettergren, A., Svärd, J., Hovey, D., Lin, T., Ebner, N.C., & Fischer, H. (2016). Variation in the oxytocin receptor gene is associated with face recognition and its neural correlates. Frontiers in Behavioral Neuroscience, 10:178. doi: 10.3389/fnbeh.2016.00178

Nilsonne, G., Tamm, S., Schwarz, J., Almeida, R., Fischer, H., Kecklund, G., Lekander, M., Fransson, P., & Åkerstedt, T. (in press). Intrinsic brain connectivity after partial sleep deprivation in young and older adults: Results from the Stockholm Sleepy Brain study. BioRxiv, 073494. doi: 10.1101/073494

Szymkowicz, S.M., Persson, J., Lin, T., Fischer, H., & Ebner, N.C. (2016). Hippocampal brain volume is associated with faster facial emotion identification in older adults: preliminary results. Frontiers in Aging Neuroscience, 8:203. doi: 10.3389/fnagi.2016.00203

Sörman, K., Nilsonne, G., Howner, K., Tamm, S., Caman, S., Wang, H.X., Edens, J.F., Lilienfeld, S.O., Petrovic, P., Fischer, H., & Kristiansson, M. (2016). Reliability and Construct Validity of the Psychopathic Personality Inventory-Revised in a Non-Criminal Sample of Swedish Males. PLOS ONE, 11(6):e0156570. doi: 10.1371/journal.pone.0156570

Furmark, T., Marteinsdottir, I., Frick, A., Heurling, K., Tillfors, M., Appel, L., Antoni, G., Hartvig, P., Fischer, H., Långström, B., Eriksson, E., & Fredrikson, M. (2016). Serotonin Synthesis Rate and the Tryptophan Hydroxylase-2 G-703T Polymorphism in Social Anxiety Disorder. Journal of Psychopharmacology, 30(10), 1028-1035. doi: 10.1177/0269881116648317

Ebner, N.C., Chen, H., Porges, E., Lin, T., Fischer, H., Feifel, D., & Cohen, R.A. (2016). Oxytocin’s Effect on Resting-State Functional Connectivity Varies by Age and Sex. Psychoneuroendocrinology, 69, 50-59. doi: 10.1016/j.psyneuen.2016.03.013

Karlsson, S., Henningsson, S., Hovey, D., Zettergren, A., Jonsson, L., Sanchez Cortes, D., Melke, J., Fischer, H., Laukka, P., & Westberg, L. (2016). Social memory associated with estrogen receptor polymorphisms in women. Social Cognitive and Affective Neuroscience, 11(6) 877-883. doi: 10.1093/scan/nsw010

Persson, N., Lavebratt, C., & Fischer, H. (2016). Pulse Pressure magnifies the effect of COMTVal158Met on 15 years episodic memory trajectories. Frontiers in Aging Neuroscience, 8:34. doi: 10.3389/fnagi.2016.00034

Ziaei, M., & Fischer, H. (2016). Emotion and Aging: The impact of emotion on attention, memory, and face recognition in late adulthood ( Ziaei & Fischer, 2016 (696 Kb) , PDF). In J. R. Absher & J. Cloutier (Eds.), Neuroimaging Personality, Social Cognition, and Character. Academic Press. (ISBN: 9780128011669)


Rypma, B., Fischer, H., Riekmann, A., Hubbard, N.A., Nyberg, L., & Bäckman, L. (2015). Dopamine D1 Binding Potential Predicts Fusiform BOLD Activity during Face-Recognition Performance. Journal of Neuroscience, 35(44), 14702-14707. doi: 10.1523/JNEUROSCI.1298-15.2015

Henningsson, S., Zettergren, A., Hovey, D., Jonsson, L., Svärd, J., Cortes, D.S., Melke, J., Ebner, N.C., Laukka, P., Fischer, H., & Westberg, L. (2015). Association between polymorphisms in NOS3 and KCNH2 and social memory. Frontiers in Neuroscience, 9:393. doi: 10.3389/fnins.2015.00393

Ebner, N.C., Horta, M., Lin, T., Feifel, D., Fischer, H., & Cohen, R.A. (2015). Oxytocin modulates meta-mood as a function of age and sex. Frontiers in Aging Neuroscience, 7, 175. doi: 10.3389/fnagi.2015.00175

Gerhardsson, A., Högman, L., & Fischer, H. (2015). Viewing distance matters to perceived intensity of facial expressions. Frontiers in Psychology, Emotion Science, 6, 944. doi: 10.3389/fpsyg.2015.00944

Harmat, L., de Manzano, Ö., Theorell, T., Högman, L., Fischer, H., & Ullén, F. (2015). Physiological correlates of psychological flow during computer game playing. International Journal of Psychophysiology, 97(1), 1-7. doi: 10.1016/j.ijpsycho.2015.05.001

Persson, J., Rieckmann, A., Kalpouzos, G., Fischer, H., & Bäckman, L. (2015). Influences of a DRD2 polymorphism on updating of long-term memory representations and caudate BOLD activity: Magnification in aging. Human Brain Mapping, 36(4), 1325-1334. doi: 10.1002/hbm.22704


Ebner, N.C., & Fischer, H. (2014). Studying the Various Facets of Emotional Aging: An Introduction to the Current Frontiers Research Topic. Front. Psychol., 5, 1007. doi: 10.3389/fpsyg.2014.01007

Ebner, N.C., & Fischer, H. (2014). Emotion and Aging: Evidence from Brain and Behavior. Front. Psychol., 5, 996. doi: 10.3389/fpsyg.2014.00996

Sörman, K., Edens, J.F., Smith, S.T., Svensson, O., Howner, K., Kristiansson, M., & Fischer, H. (2014). Forensic Mental Health Professionals' Perceptions of Psychopathy: A Prototypicality Analysis of the Comprehensive Assessment of Psychopathic Personality in Sweden. Law and Human Behavior. doi: 10.1037/lhb0000072

Svärd, J., Fischer, H., & Lundqvist, D. (2014). Adult age-differences in subjective impression of emotional faces are reflected in emotion-related attention and memory tasks. Frontiers in Psychology, 5, 423. doi: 10.3389/fpsyg.2014.00423

Salami, A., Rieckmann, A., Fischer, H., & Bäckman, L. (2014). A multivariate analysis of age-related differences in functional networks supporting conflict resolution. NeuroImage, 86, 150-163. doi: 10.1016/j.neuroimage.2013.08.002

Frick, A., Gingnell, M., Marquand, A.F., Howner, K., Fischer, H., Kristiansson, M., Williams, S.C.R., Fredrikson, M., & Furmark, T. (2014). Classifying social anxiety disorder using multivoxel pattern analyses of brain function and structure. Behavioural Brain Research, 259, 330-335. doi: 10.1016/j.bbr.2013.11.003


Frick, A., Howner, K., Fischer, H., Ågren, T.,  Kristiansson, M., & Furmark, T. (2013). Altered fusiform connectivity during processing of fearful faces in social phobia. Translational Psychiatry, 3, e312. doi: 10.1038/tp.2013.85

Ebner, N.C., Maura, G.M., Macdonald, K., Westberg, L., & Fischer, H. (2013). Oxytocin and Socioemotional Aging-Current Knowledge and Future Trends. Frontiers in Human Neuroscience, 7, 487. doi: 10.3389/fnhum.2013.00487

Lundqvist, D., Svärd, J., & Fischer, H. (2013). Age-related differences in sensitivity to emotional facial stimuli but age-independent association between arousal ratings and visual search efficiency. Psychological Topics : Psihologijske Teme, 22(2), 271-286.

Lovén, J., Svärd, J., Ebner, N.C., Herlitz, A., & Fischer, H. (2013). Face Gender Modulates Women's Brain Activity during Face Encoding. Social Cognitive and Affective Neuroscience. Epub 2013 June 13. PubMed:

Ebner, N.C., Johnson, M.R., Rieckmann, A., Durbin, K.A., Johnson, M.K., & Fischer, H. (2013). Processing own-age vs. other-age faces: Neuro-behavioral correlates and effects of emotion. NeuroImage, 78, 363-71. doi: 10.1016/j.neuroimage.2013.04.029

Frick, A., Howner, K., Fischer, H., Fristed Eskildsen, S., Kristiansson, M., & Furmark, T. (2013). Cortical Thickness Alterations in Social Anxiety Disorder. Neuroscience Letters, 536, 52-5. Epub 2013 Jan 14.


Rieckmann, A., Karlsson, S., Fischer, H., & Bäckman, L. (2012). Increased Bilateral Frontal Connectivity during Working Memory in Young Adults under the Influence of a Dopamine D1 Receptor Antagonist. The Journal of Neuroscience, 32(48), 17067-17072. doi: 10.1523 ​/JNEUROSCI.1431-12.2012

Svärd, J., Wiens, S., & Fischer, H. (2012). Superior recognition performance for happy masked and unmasked faces in both younger and older adults. Front. Psychology, 3, 520. doi: 10.3389/fpsyg.2012.00520

Kalpouzos, G., Fischer, H., Rieckmann, A., MacDonald, S.W., & Bäckman, L. (2012). Impact of negative emotion on the neural correlates of long-term recognition in younger and older adults. Front. Integr. Neurosci., 6:74. doi: 10.3389/fnint.2012.00074

Ebner, N.C., Johnson, M.K., & Fischer, H. (2012). Neural Mechanisms of Reading Emotions in Faces of Young and Older Adults. Frontiers in Emotion Science, 3:223. doi: 10.3389/fpsyg.2012.00223

Gavazzeni, J., Andersson, T., Bäckman, L., Wiens, S., & Fischer, H. (2012, April 16). Age, Gender, and Arousal in Recognition of Negative and Neutral Pictures 1 Year Later. Psychology and Aging. Advance online publication. doi: 10.1037/a0027946

Howner, K., Eskildsen, S.F., Fischer, H., Dierks, T., Wahlund, L.-O., Jonsson, T., Kristoffersen Wiberg, M., & Kristiansson, M. (2012). Thinner cortex in the temporal lobes in mentally disordered offenders with psychopathy. Psychiatry Research: Neuroimaging. Advance online publication. doi: 10.1016/j.pscychresns.2011.12.011.


Rieckmann, A., Karlsson, S., Fischer, H., Nyberg, L., & Bäckman, L. (2011). Caudate dopamine D1 receptor density is associated with individual differences in fronto-parietal connectivity during working memory. Journal of Neuroscience, 31, 14284-14290.

Johnell, K., & Fischer, H. (2011). Dopaminergic and serotonergic drug use: A nationwide register-based study of over 1 300 000 older people. PLoS One, 6(8):e23750. Epub 2011 Aug 15.

Howner, K., Fischer, H., Dierks, T., Federspiel, A., Wahlund, L.-O., Jonsson, T., Kristoffersen Wiberg, M., & Kristiansson, M. (2011). Brain Processing of Fearful Facial Expression in Mentally Disordered Offenders. Journal of Behavioral and Brain Science, 1, 115-123. doi: 10.4236/jbbs.2011.13016

Brehmer, Y., Rieckmann, A., Bellander, M., Westerberg, H., Fischer, H., & Bäckman, L. (2011). Neural correlates of training-related working-memory gains in old age. NeuroImage, 58, 1110-1120. Epub 2011 Jul 2.

Rieckmann, A., Karlsson, S., Karlsson, P., Brehmer, Y., Fischer, H., Farde, L., Nyberg, L., & Bäckman, L. (2011). Dopamine D1 receptor associations within and between dopaminergic pathways in younger and elderly adults: Links to cognitive performance. Cerebral Cortex, 21, 2023-2032. Epub 2011 Jan 21.

Bäckman, L., Karlsson, S., Fischer, H., Karlsson P, Brehmer Y, Rieckmann A, Macdonald S.W.S., Farde L, Nyberg L. (2011). Dopamine D1 Receptors and Age Differences in Brain Activation During Working Memory. Neurobiology of Aging, 32(10), 1849-1856.


Wahlund, K., Sörman, K., Gavazzeni, J., Fischer, H., & Kristiansson, M. (2010). Attenuated subjective ratings and skin conductance responses to neutral and negative pictures in non-psychopathic mentally disordered offenders with various diagnoses. Psychiatry Research, 180, 30-34.

Werheid, K., Gruno, M., Kathmann, N., Fischer, H., Almqvist, O., & Winblad, B. (2010). Biased recognition of positive faces on normal aging and amnestic mild cognitive impairment. Psychology and Aging, 25, 1-15.

Rieckmann, A., Fischer, H., & Bäckman, L. (2010). Activation in striatum and medial-temporal lobe during sequence learning in younger and older adults: Relations to performance. NeuroImage, 50, 1303-1312.

Fischer, H., Nyberg, L., Karlsson, S., Karlsson, P., Brehmer, Y., Rieckmann, A., MacDonald, S.W.S., Farde, L., & Bäckman, L. (2010). Simulating Neurocognitive Aging: Effects of a Dopaminergic Antagonist on Brain Activity During Working Memory. Biological Psychiatry, 67, 575-580.

Fischer, H., Nyberg, L., & Bäckman, L. (2010). Age-related differences in brain regions supporting successful encoding of emotional faces. Cortex, 46, 490-497.

Gordh, T., Vinnars, B., Fischer, H., Blomberg, H., Modig, J., Fredrikson, M., & Hartvig, P. (2010). Brain activation due to postoperative pain from the right hand measured with regional cerebral blood flow using positron emission tomography. Scandinavian Journal of Pain, 2010, 1, 115–119.


Karlsson, S., Nyberg, L., Karlsson, P., Fischer, H., Thilers, P., MacDonald, S.W.S., Brehmer, Y., Rieckmann, A., Halldin, C., Farde, L., & Bäckman, L. (2009). Modulation of striatal dopamine D1 binding by cognitive processing. NeuroImage, 48, 398-404.

Wahlund, K., Kristiansson, M., Fischer, H., Dierks, T., Wahlund, L.-O., Kristoffersen-Wiberg, M., & Jonsson, T. (2009). Psychopathy and brain imaging-a litterature review with focus on functional magnetic resonance imaging. Läkartidningen, 6, 361-365.


MacDonald, S.W.S., Sandblom, J., Fischer, H., & Bäckman, L. (2008). Increased Response-Time Variability is Associated with Reduced Inferior Parietal Activation During Episodic Recognition in Aging. Journal of Cognitive Neuroscience, 20, 779-786.

Gavazzeni, J., Wiens, S., & Fischer, H. (2008). Age effects to negative arousal differ for self-report and electrodermal activity. Psychophysiology, 45, 148-151.


Fischer, H., Sandblom, J., Nyberg, L., Herlitz, A., & Bäckman, L. (2007). Brain activation while forming memories of fearful and neutral faces in women and men. Emotion, 4, 767-773.


Wik, G., Fischer, H., Bragée, B., Kristiansson, M., & Fredrikson, M. (2006). Retrosplenial cortical deactivation during painful stimulation of patients with fibromyalgia. International Journal of Neuroscience, 116, 1-8.


Fischer, H., Sandblom, J., Gavazzeni, J., Fransson, P., Wright, C.I., & Bäckman, L. (2005). Age-differential patterns of brain activation during perception of angry faces. Neuroscience letters, 386, 99-104.

Wright, C.I., McMullin, K., Martis, B., Fischer, H., & Rauch, S.L. (2005). Brain correlates of negative visuospatial priming in healthy children. Psychiatry Research, 139(1), 41-52.


Fischer, H., Fransson, P., Wright, C.I., & Bäckman, L. (2004). Enhanced occipital and anterior cingulate activation in men but not in women during exposure to aversive same-sex faces. Cognitive, Affective and Behavioral Neuroscience, 4(3), 326-334.

Fischer, H., Sandblom, J., Herlitz, A., Fransson, P., Wright, C.I., & Bäckman, L. (2004). Sex- differential brain activation during exposure to female and male faces. NeuroReport, 15(2), 235-238.


Wik, G., Fischer, H., Bragée, B., Kristiansson, M., & Fredrikson, M. (2003). Retrosplenial cortical activation in the fibromyalgia syndrome. NeuroReport, 14(4), 619-621.

Wright, C.I., Martis, B., Schwartz, C., Shin, L.M., Fischer, H., McMullin, K., & Rauch, S.L. (2003). Novelty responses and differential effects of order in the amygdala, substantia innominata and inferior temporal cortex. NeuroImage, 18(3), 660-669. doi: 10.1016/S1053-8119(02)00037-X

Fischer, H., Wright, C.I., Whalen, P.J., McInerney, S.C., Shin, L.M., & Rauch, S.L. (2003). Brain habituation during repeated exposure to fearful and neutral faces: A Functional MRI study. Brain Research Bulletin, 59(5), 387-392.


Fischer, H., Andersson, J.L.R., Furmark, T., Wik, G., & Fredrikson, M. (2002). Right-sided human prefrontal brain activation during fear conditioning acquisition. Emotion, 2(3), 233-241.

Pissiota, A., Frans, Ö., Fernandez, M., von Knorring, L., Fischer, H., & Fredrikson, M. (2002). Neurofunctional correlates of post traumatic stress disorder: A PET symptom provocation study. European Archives of Psychiatry and Clinical Neuroscience, 252(2), 68-75.

Furmark, T., Tillfors, M., Marteinsdottir, I., Fischer, H., Pissiota, A., & Fredrikson, M. (2002). Common changes in cerebral blood flow in patients with social phobia reated with citalopram or cognitive-behavioral therapy. Archives of General Psychiatry, 59(5), 425-433.

Wright, C.I., Martis, B., Shin, L.M., Fischer, H., & Rauch, S.L. (2002). Enhanced amygdala responses to emotional versus neutral schematic facial expression. NeuroReport, 13(6), 785-790.


Tillfors, M., Furmark, T., Marteinsdottir, I., Fischer, H., Pissiota, A., & Fredrikson, M. (2001). Cerebral blood flow in social phobics during stressful speaking tasks: A PET-study. American Journal of Psychiatry, 158(8), 1220-1226.

Fischer, H., Tillfors, M., Furmark, T., & Fredrikson, M. (2001). Dispositional pessimism and amygdala activity: A PET study in healthy volunteers. NeuroReport, 12(8), 1635-1638.

Whalen, P.J., Shin, L.M., McInerney, S.C., Fischer, H., Wright, C.I., & Rauch, S.L. (2001). A functional MRI study of human amygdala responses to facial expressions of fear vs. anger. Emotion, 1(1), 70-83.

Wright, C.I., Fischer, H., Whalen, P.J., McInerney, S.C., Shin, L.M., & Rauch, S.L. (2001). Differential prefrontal cortex and amygdala habituation to repeatedly presented emotional facial stimuli. NeuroReport, 12 (2), 379-383.

Fernandes, M., Pissiota, A., Frans, Ö., von Knorring, L., Fischer, H., & Fredrikson, M. (2001). Brain function in a patient with torture related posttraumatic stress disorder before and after fluoxetine treatment. Neuroscience Letters, 297(2), 101-104.


Hart, A.J., Whalen, P.J., Shin, L.M., McInerney, S.C., Fischer, H., & Rauch, S.L. (2000). Differential responses in the human amygdala to racial outgroup versus ingroup face stimuli. NeuroReport, 11(11), 2351-2355.

Fischer, H., Andersson, J.L.R., Furmark, T., & Fredrikson, M. (2000). Fear conditioning and brain activity: A positron emission tomography study in humans. Behavioral Neuroscience, 114(4), 671-680.

Fischer, H., Furmark, T., Wik, G., & Fredrikson, M. (2000). Brain representation of habituation to repeated complex visual stimulation studied with PET. NeuroReport, 11(1), 123-126.


Wik, G., Fischer, H., Finer, B., Bragee, B., & Fredrikson, M. (1999). Functional anatomy of hypnotic analgesia: A PET study of patients with fibromyalgia. European Journal of Pain, 3(1), 7-12.

Fredrikson, M., Wik, G., & Fischer, H. (1999). Higher hypothalamic and hippocampal neural activity in type A than type B women. Personality and Individual Differences, 26(2), 265-270. doi: 10.1016/S0191-8869(98)00127-5


Fischer, H., Andersson, J.L.R., Furmark, T., & Fredrikson, M. (1998). Brain correlates of an unexpected panic attack: A human positron emission tomographic study. Neuroscience Letters, 251(2), 137-140.


Imamura, K., Richter, H., Fischer, H., Lennerstrand, G., Franzén, O., Rydberg, A., Andersson, J., Scgneider, H., Onoe, H., Watanabe, Y., & Långström, B. (1997). Reduced activity in the extrastriate visual dcortex of individuals with strabismic amblyopia. Neuroscience Letters, 225(3), 173-176.

Fredrikson, M., Furmark, T., Tillfors Olsson, M., & Fischer, H. (1997). Functional neuroanatomical correlates of electrodermal activity: A positron emission tomography study. Psychophysiology 35(2), 179-185.

Wik, G., Fredrikson, M., & Fischer, H. (1997). Evidence of altered cerebral blood-flow relationships in acute phobia. International Journal of Neuroscience, 91(3-4), 253-263.

Fredrikson, M., Fischer, H., & Wik, G. (1997). Cerebral blood flow during anxiety provocation. Journal of Clinical Psychiatry, 58, Suppl 16, 16-21.

Furmark, T., Fischer, H., Wik, G., Larsson, M., & Fredrikson, M. (1997). The amygdala and individual differences in human fear conditioning. NeuroReport, 8(18), 3957-3960.

Fischer, H., Wik, G., & Fredrikson, M. (1997). Extraversion, Neuroticism and brain function: A PET study of personality. Personality and Individual Differences, 23(2), 345-352. doi: 10.1016/S0191-8869(97)00027-5


Wik, G., Fredrikson, M., & Fischer, H. (1996). Cerebral correlates of anticipated fear: A PET study of specific phobia. International Journal of Neuroscience, 87(3-4), 267-276.

Fischer, H., Wik, G., & Fredrikson, M. (1996). Functional neuroanatomy of robbery re-experience: Affective memories studied with PET. NeuroReport, 7(13), 2081-2086.

Fredrikson, M., Annas, P., Fischer, H., & Wik, G. (1996). Gender and age differences in the prevalence of specific fears and phobias. Behavior Research and Therapy, 34(1), 33-39.


Fredrikson, M., Wik, G., Fischer, H., &Andersson, J. (1995). Affective and attentive neural networks in humans: A PET-study of Pavlovian conditioning. NeuroReport, 7(1), 97-101.