Publications
- Daunizeau J, Stephan KE, Friston KJ (2012) Stochastic Dynamic Causal Modelling of fMRI data: Should we care about neural noise? NeuroImage, in press.
- Schofield T, Penny W, Stephan KE, Crinion J, Thompson AJ, Price C, Leff A (2012) Changes in auditory feedback connections determine the severity of speech processing deficits after stroke. Journal of Neuroscience 32: 4260 - 4270.
PubMed
- Stephan KE, Roebroeck A (2012) A short history of causal modeling of fMRI data. NeuroImage, in press.
- Friston KJ, Daunizeau J, Stephan KE (2012) Model selection and gobbledygook: Response to Lohmann et al. NeuroImage, in press.
- Friston KJ, Shiner T, FitzGerald T, Galea JM, Adams R, Brown H, Dolan RJ, Moran R, Stephan KE, Bestmann S (2012) Dopamine, affordance and active inference. PLoS Computational Biology 8: e1002327.
PLoS Computational Biology
- Schmidt A, Bachmann R, Kometer M, Csomor PA, Stephan KE, Seifritz E, Vollenweider FX (2012) Mismatch negativity encoding of prediction errors predicts S-ketamine-induced cognitive impairments. Neuropsychopharmacology 37: 865–875.
PubMed
- Friston KJ, Bastos A, Litvak V, Stephan KE, Fries P, Moran RJ (2012) DCM for complex-valued data: cross-spectra, coherence and phase-delays. NeuroImage 59: 439-455.
PubMed
- Chen CC, Kiebel SJ, Kilner JM, Ward NS, Stephan KE, Wang WJ, Friston KJ (2012) A dynamic causal model for evoked and induced responses. NeuroImage 59: 340-348.
PubMed
- Daunizeau J, Preuschoff K, Friston KJ, Stephan KE (2011) Optimizing experimental design for comparing models of brain function. PLoS Computational Biology 7: e1002280.
PLoS Computational Biology
- Dima D, Stephan KE, Roiser JP, Friston KJ, Frangou S (2011) Effective Connectivity during Processing of Facial Affect: Evidence for Multiple Parallel Pathways. Journal of Neuroscience 31: 14378-14385.
PubMed
- Moran RJ, Jung F, Kumagai T, Endepols H, Graf R, Dolan RJ, Friston KJ, Stephan KE, Tittgemeyer M (2011) Dynamic causal models and physiological inference: a validation study using isoflurane anaesthesia in rodents. PLoS One 6: e22790.
PLoS One
- Moran RJ, Symmonds M, Stephan KE, Friston KJ, Dolan RJ (2011) An in vivo assay of synaptic function mediating human cognition. Current Biology 21: 1320–1325.
PubMed
- Brodersen KH, Schofield TM, Leff AP, Ong CS, Lomakina EI, Buhmann JM, Stephan KE (2011) Generative embedding for model-based classification of fMRI data. PLoS Computational Biology 7: e1002079.
PLoS Computational Biology
- Li B, Daunizeau J, Stephan KE, Penny W, Hu D, Friston K (2011) Generalised filtering and stochastic DCM for fMRI. NeuroImage 58: 442-457.
PubMed
- Daunizeau J, David, O, Stephan KE (2011) Dynamic Causal Modelling: A critical review of the biophysical and statistical foundations. NeuroImage 58: 312-322.
PubMed
- O'Daly OG, Joyce D, Stephan KE, Murray RM, Shergill SS (2011) Functional magnetic resonance imaging investigation of the amphetamine sensitization model of schizophrenia in healthy male volunteers. Arch Gen Psychiatry 68: 545-554.
PubMed
- Mathys C, Daunizeau J, Friston KJ, Stephan KE (2011) A Bayesian foundation for individual learning under uncertainty. Frontiers in Human Neuroscience 5: 39.
Frontiers in Human Neuroscience
- Friston KJ, Li B, Daunizeau J, Stephan KE (2011) Network discovery with DCM. NeuroImage 56: 1202–1221.
PubMed
- Brodersen KH, Haiss F, Ong CS, Jung F, Tittgemeyer M, Buhmann JM, Weber B, Stephan KE (2011) Model-based feature construction for multivariate decoding. NeuroImage 56: 601-615.
PubMed
- Moran RJ, Stephan KE, Dolan RJ, Friston KJ (2011) Consistent spectral predictors for dynamic causal models of steady state responses. NeuroImage 55: 1694-1708.
PubMed
- Daunizeau J, den Ouden HEM, Pessiglione M, Kiebel SJ, Stephan KE, Friston KJ (2010) Observing the observer (I): Meta-Bayesian models of learning and decision-making. PLoS ONE 5: e15554.
PLoS ONE
- Daunizeau J, den Ouden HEM, Pessiglione M, Kiebel SJ, Friston KJ, Stephan KE (2010) Observing the observer (II): Deciding when to decide. PLoS ONE 5: e15555.
PLoS ONE
- Marreiros AC, Stephan KE, Friston K (2010) Dynamic causal modeling. Scholarpedia 5(7): 9568.
Scholarpedia
- Friston K, Stephan KE, Li B, Daunizeau J (2010) Generalised filtering. Mathematical Problems in Engineering 2010: 621670.
Mathematical Problems in Engineering
- Stephan KE, Friston KJ (2010) Analyzing effective connectivity with fMRI. Wiley Interdisciplinary Reviews: Cognitive Science 1: 446-459.
Wiley Interscience
- Penny WD, Stephan KE, Daunizeau J, Joao M, Friston K, Schofield T, Leff AP (2010) Comparing Families of Dynamic Causal Models. PLoS Computational Biology 6: e1000709.
PLoS Computational Biology
- den Ouden HEM, Daunizeau J, Roiser JP, Friston KJ, Stephan KE (2010) Striatal prediction error modulates cortical coupling. Journal of Neuroscience 30: 3210-3219.
PubMed
- Roiser JP, Stephan KE, den Ouden HEM, Friston KJ, Joyce EM (2010) Adaptive and aberrant reward prediction signals in the human brain. NeuroImage 50: 657-664.
PubMed
- Guitart-Masip M, Bunzeck N, Stephan KE, Dolan RJ, Düzel E (2010) Contextual novelty changes reward representations in the striatum. Journal of Neuroscience 30: 1721-1726.
PubMed
- Stephan KE, Penny WD, Moran RJ, den Ouden HEM, Daunizeau J, Friston KJ (2010) Ten simple rules for Dynamic Causal Modelling. NeuroImage 49: 3099-3109.
PubMed
- Kasess CH, Stephan KE, Weissenbacher A, Pezawas L, Moser E, Windischberger C (2010) Multi-Subject Analyses with Dynamic Causal Modeling. NeuroImage 49: 3065-3074.
PubMed
- Allen P, Stephan KE, Mechelli A, Day F, Ward N, Dalton J, Williams S, McGuire P (2010) Cingulate activity and fronto-temporal connectivity in people with prodromal signs of psychosis. NeuroImage 49: 947-955.
PubMed
- Stephan KE, Kasper L, Brodersen KH, Mathys C (2009) Funktionelle und effektive Konnektivität. Klinische Neurophysiologie 40: 222-232.
Thieme eJournals
- Garrido MI, Kilner JM, Kiebel SJ, Stephan KE, Baldeweg T, Friston KJ (2009)
Repetition suppression and plasticity in the human brain. NeuroImage 48: 269-279.
PubMed
- Stephan KE, Tittgemeyer M, Knösche TR, Moran RJ, Friston KJ (2009)
Tractography-based priors for dynamic causal models. NeuroImage 47: 1628-1638.
PubMed
- Schofield TM, Iverson P, Kiebel SJ, Stephan KE, Kilner JM, Friston KJ, Crinion JT, Price CJ, Leff AP (2009) Changing meaning causes coupling changes within higher levels of the cortical hierarchy. Proceedings of the National Academy of Sciences 106: 11765-11770.
PubMed
- Tegnér J, Compte A, Auffray C, An G, Cedersund G, Clermont G, Gutkin B, Oltvai ZN, Stephan KE, Thomas R, Villoslada P (2009) Computational Disease Modeling – Fact or Fiction? BMC Systems Biology 3: 56.
PubMed
- Stephan KE, Penny WD, Daunizeau J, Moran RJ, Friston KJ (2009)
Bayesian model selection for group studies. NeuroImage 46: 1004-1017.
PubMed
- Stephan KE, Friston KJ, Frith CD (2009)
Dysconnection in schizophrenia: From abnormal synaptic plasticity to failures of self-monitoring.
Schizophrenia Bulletin 35: 509-527.
PubMed
- Garrido MI, Kilner JM, Stephan KE, Friston KJ (2009)
The mismatch negativity: a review of underlying mechanisms.
Clinical Neurophysiology 120: 453-463.
PubMed
- den Ouden HEM, Friston KJ, Daw ND, McIntosh AR, Stephan KE (2009) A dual role for prediction error in associative learning. Cerebral Cortex 19: 1175-1185.
PubMed
- Chen CC, Henson RN, Stephan KE, Kilner JM, Friston KJ (2009)
Forward and backward connections in the brain: A DCM study of functional asymmetries. NeuroImage 45: 453-462.
PubMed
- Roiser JP, Stephan KE, den Ouden HEM, Barnes TRE, Friston KJ, Joyce EM (2009) Do patients with schizophrenia exhibit aberrant salience? Psychological Medicine 39: 199-209.
PubMed
- Heim S, Eickhoff SB, Ischebeck AK, Friederici AD, Stephan KE, Amunts K (2009) Effective connectivity of the left BA 44, BA 45, and inferior temporal gyrus during lexical and phonological decisions identified with DCM. Human Brain Mapping 30:392-402.
PubMed
- Moran RJ, Stephan KE, Seidenbecher T, Pape HC, Dolan RJ, Friston KJ (2009)
Dynamic causal models of steady-state responses. NeuroImage 44: 796-811.
PubMed
- Leff AP, Schofield AM, Stephan KE, Crinion JT, Friston KJ, Price CJ (2008) The cortical dynamics of intelligible speech. Journal of Neuroscience 28: 13209-13215.
PubMed
- Brodersen KH, Penny WD, Harrison LM, Daunizeau J, Ruff CC, Duzel E, Friston KJ, Stephan KE (2008)
Integrated Bayesian models of learning and decision making for saccadic eye movements.
Neural Networks 21: 1247-1260.
PubMed
- Allen P, Mechelli A, Stephan KE, Day F, Dalton J, Williams S, McGuire PK (2008) Frontotemporal interactions during overt verbal initiation and suppression. Journal of Cognitive Neuroscience 20: 1656-1669.
MIT Press Journals
- Garrido MI, Friston KJ, Kiebel SJ, Stephan KE, Baldeweg T, Kilner JM (2008) The functional anatomy of the MMN: A DCM study of the roving paradigm. NeuroImage 42: 936-944.
PubMed
- Stephan KE, Kasper L, Harrison LM, Daunizeau J, den Ouden HEM, Breakspear M, Friston KJ (2008) Nonlinear dynamic causal models for fMRI. NeuroImage 42: 649-662.
PubMed
- Moran RJ, Stephan KE, Kiebel SJ, Rombach N, O'Connor WT, Murphy KJ, Reilly RB, Friston KJ (2008) Bayesian estimation of synaptic physiology from the spectral responses of neural masses. NeuroImage 42: 272-284.
PubMed
- Stephan KE, Riera JJ, Deco G, Horwitz B (2008) The Brain Connectivity Workshops: Moving the frontiers of computational systems neuroscience. NeuroImage 42: 1-9.
PubMed
- Gobbelé R, Lamberty K, Stephan KE, Stegelmeyer U, Buchner H, Marshall JC, Fink GR, Waberski TD (2008) Temporal activation patterns of lateralized cognitive and task control processes in the human brain. Brain Research 1205: 81-90.
PubMed
- Grol MJ, Majdandzic J, Stephan KE, Verhagen L, Dijkerman C, Bekkering H, Verstraten FAJ, Toni I (2007) Parieto-frontal connectivity during visually-guided grasping. Journal of Neuroscience 27: 11877-11887.
PubMed
- Friston KJ, Stephan KE (2007) Free-energy and the brain. Synthese 159: 417-458.
PubMed
- Stephan KE, Weiskopf N, Drysdale PM, Robinson PA, Friston KJ (2007) Comparing hemodynamic models with DCM. NeuroImage 38: 387-401.
PubMed
- Moran, RJ, Kiebel SJ, Stephan KE, Reilly RB, Daunizeau J, Friston KJ (2007) A neural mass model of spectral responses in electrophysiology. NeuroImage 37: 706-720.
PubMed
- Kumar S, Stephan KE, Warren JD, Friston KJ, Griffiths TD (2007) Hierarchical processing of auditory objects in humans. PLoS Computational Biology 3: e100.
PubMed
- Garrido MI, Kilner JM, Kiebel SJ, Stephan KE, Friston KJ (2007) Dynamic causal modelling of evoked potentials: A reproducibility study. NeuroImage 36: 571-580.
PubMed
- Griffiths TD, Kumar S, Warren JD, Stewart L, Stephan KE, Friston KJ (2007) Approaches to the cortical analysis of auditory objects. Hearing Research 229: 46-53.
PubMed
- Stephan KE, Marshall JC, Penny WD, Friston KJ, Fink GR (2007) Inter-hemispheric integration of visual processing during task-driven lateralization. Journal of Neuroscience 27: 3512-3522.
PubMed
- Manjaly ZM, Bruning N, Neufang S, Stephan KE, Brieber S, Marshall JC, Kamp-Becker I, Remschmidt H, Herpertz-Dahlmann B, Konrad K, Fink GR (2007) Neurophysiological correlates of relatively enhanced local visual search in autistic adolescents. NeuroImage 35: 283-291.
PubMed
- Stephan KE, Harrison LM, Kiebel SJ, David O, Penny WD, Friston KJ (2007) Dynamic causal models of neural system dynamics: current state and future extensions. Journal of Biosciences 32: 129-144.
PubMed
- Harrison LM, Stephan KE, Rees G, Friston KJ (2007) Extra-classical receptive field effects measured in striate cortex with fMRI. NeuroImage 34: 1199-1208.
PubMed
- Stephan KE, Fink GR, Marshall JC (2007) Mechanisms of hemispheric specialization: insights from analyses of connectivity. Neuropsychologia 45: 209-228.
PubMed
- Pleger B, Blankenburg F, Ruff CC, Bestmann S, Wiech K, Stephan KE, Capilla A, Friston KJ, Dolan RJ (2006) Neural coding of tactile decisions in human prefrontal cortex. Journal of Neuroscience 26: 12596-12601.
PubMed
- Wiech K, Kalisch R, Weiskopf N, Pleger B, Stephan KE, Dolan RJ (2006) Anterolateral prefrontal cortex mediates the analgesic effect of expected and perceived control over pain. Journal of Neuroscience 26: 11501-11509.
PubMed
- Rounis E, Stephan KE, Lee L, Siebner HR, Pesenti A, Friston KJ, Rothwell JC, Frackowiak RSJ (2006)
Acute changes in fronto-parietal activity following rTMS over the dorsolateral prefrontal cortex in a cued reaction time task. Journal of Neuroscience 26: 9629-9638.
PubMed
- Kalisch R, Korenfeld E, Stephan KE, Weiskopf N, Seymour B, Dolan RJ (2006) Context-dependent human extinction memory is mediated by a ventromedial prefrontal and hippocampal network. Journal of Neuroscience 26: 9503-9511.
PubMed
- Hesse MD, Thiel CM, Stephan KE, Fink GR (2006) The left parietal cortex and motor intention: an event-related fMRI study. Neuroscience 140: 1209-1221.
PubMed
- Stephan KE, Baldeweg T, Friston KJ (2006) Synaptic plasticity and dysconnection in schizophrenia. Biological Psychiatry 59: 929-939.
PubMed
- Stephan KE, Mattout J, David O, Friston KJ (2006) Models of functional neuroimaging data. Current Medical Imaging Reviews 2: 15-34
Bentham Science Publishers
- Smith APR, Stephan KE, Rugg MD, Dolan RJ (2006) Task and content modulate amygdala-hippocampal connectivity in emotional retrieval. Neuron 49: 631-638.
PubMed
- Pleger B, Blankenburg F, Bestmann S, Ruff CC, Wiech K, Stephan KE, Friston KJ, Dolan RJ (2006)
Repetitive transcranial magnetic stimulation-induced changes in sensorimotor coupling parallel improvements of somatosensation in humans.
Journal of Neuroscience 26: 1945-1952.
PubMed
- Singer T, Seymour B, O’Doherty J, Stephan KE, Dolan RJ, Frith CD (2006) Empathic neural responses are modulated by the perceived fairness of others. Nature 439: 466-469.
PubMed
- Baldeweg T, Wong D, Stephan KE (2006) Nicotinic modulation of human auditory sensory memory: evidence from mismatch negativity potentials. International Journal of Psychophysiology 59: 49-58.
PubMed
- Stephan KE, Penny WD, Marshall JC, Fink GR, Friston KJ (2005) Investigating the functional role of callosal connections with dynamic causal models. Annals of the New York Academy of Sciences 1064:16-36.
PubMed
- Wiech K, Seymour B, Kalisch R, Stephan KE, Koltzenburg M, Driver J, Dolan RJ (2005) Modulation of pain processing in hyperalgesia by cognitive demand. NeuroImage 27: 59-69.
PubMed
- Eickhoff SB, Stephan KE, Mohlberg H, Grefkes C, Fink GR, Amunts K, Zilles K (2005) A new SPM toolbox for combining probabilistic cytoarchitectonic maps and functional imaging data. NeuroImage 25: 1325-1335.
PubMed
- Manjaly ZM, Marshall JC, Stephan KE, Gurd JM, Zilles K, Fink GR (2005) Context-dependent interactions of left posterior inferior frontal gyrus in a local visual search task unrelated to language. Cognitive Neuropsychology 22: 292-305.
Cognitive Neuropsychology
- Schürmann M, Hesse MD, Stephan KE, Saarelaa M, Zilles K, Hari R, Fink GR (2005) Yearning to yawn: the neural basis of contagious yawning. NeuroImage 24: 1260-1264.
PubMed
- Dyhrfjeld-Johnsen J, Maier J, Schubert D, Staiger J, Luhmann HJ, Stephan KE, Kötter R (2005)
CoCoDat: A database system for organizing and selecting quantitative data on single neurons and neuronal microcircuitry. Journal of Neuroscience Methods 141: 291-308.
PubMed
- Rowe JB, Stephan KE, Friston KJ, Frackowiak RSJ, Passingham RE (2005) The prefrontal cortex shows context-specific changes in effective connectivity to motor or visual cortex during the selection of action or colour. Cerebral Cortex 15: 85-95.
PubMed
- Friston KJ, Stephan KE, Lund TE, Morcom A, Kiebel S (2005) Mixed-effects and fMRI studies. NeuroImage 24: 244-252.
PubMed
- Stephan KE (2004) On the role of general system theory for functional neuroimaging. Journal of Anatomy 205: 443-470.
PubMed
- Penny WD, Stephan KE, Mechelli A, Friston KJ (2004) Modelling functional integration: a comparison of structural equation and dynamic causal models. NeuroImage 23: S264-274.
PubMed
- Giessing C, Thiel CM, Stephan KE, Rösler F, Fink GR (2004) Visuospatial attention: How to measure effects of infrequent, unattended events in a blocked stimulus design. NeuroImage 23: 1370-1381.
PubMed
- Stephan KE, Harrison LM, Penny WD, Friston KJ (2004) Biophysical models of fMRI responses. Current Opinion in Neurobiology 14: 629-635.
PubMed
- Penny WD, Stephan KE, Mechelli A, Friston KJ (2004b) Comparing dynamic causal models. NeuroImage 22: 1157-1172.
PubMed
- Kötter R, Stephan KE (2003) Network participation indices: characterizing component roles for information processing in neural networks. Neural Networks 16: 1261-1275.
PubMed
- Stephan KE, Marshall JC, Friston KJ, Rowe JB, Ritzl A, Zilles K, Fink GR (2003)
Lateralized cognitive processes and lateralized task control in the human brain. Science 301: 384-386.
PubMed
- Manjaly ZM, Marshall JC, Stephan KE, Gurd JM, Zilles K, Fink GR (2003) In search of the hidden: an fMRI study with implications for the study of patients with autism and with acquired brain injury. NeuroImage 19: 674-683.
PubMed
- Dyhrfjeld-Johnsen J, Stephan KE, Maier J, Luhmann H, Kötter R (2003) Guiding the modeller: organizing and selecting experimental data for single cell models using the CoCoDat database. Neurocomputing 52-54: 239-245.
ScienceDirect
- Toni I, Rowe JB, Stephan KE, Passingham RE (2002) Changes of cortico-striatal effective connectivity during visuo-motor learning. Cerebral Cortex 12: 1040-1047.
PubMed
- Passingham RE, Stephan KE, Kötter R (2002) The anatomical basis for functional localization in the cortex. Nature Reviews Neuroscience 3: 606-616.
PubMed
- Kamper L, Bozkurt A, Nielsen P, Dyhrfjeld-Johnsen J, Stephan KE, Kötter R (2002) Modelling the influence of thalamo-cortical projections on prefrontal activity. Neurocomputing 44-46: 869-873.
ScienceDirect
- Bozkurt A, Kamper L, Stephan KE, Kötter R (2002) The structural basis of information transfer from medial temporal lobe to prefrontal cortex in the macaque monkey. Neurocomputing 44-46: 753-758.
ScienceDirect
- Rowe JB, Stephan KE, Friston KJ, Frackowiak RJS, Lees A, Passingham RE (2002) Attention to action in Parkinson's disease: impaired effective connectivity among frontal cortical regions. Brain 125: 276-289.
PubMed
- Parker GJM*, Stephan KE*, Barker GJ, Rowe JB, MacManus DG, Wheeler-Kingshott CAM, Ciccarelli O, Passingham RE, Spinks R, Lemon RN, Turner R (2002) (* These authors contributed equally to this work.) Initial demonstration of in vivo tracing of axonal connectivity in the macaque brain and comparison with the human brain using Diffusion Tensor Imaging and Fast Marching Tractography. NeuroImage 15: 797-809.
PubMed
- Stephan KE, Kamper L, Bozkurt A, Burns GAPC, Young MP, Kötter R (2001)
Advanced database methodology for the Collation of Connectivity data on the Macaque brain (CoCoMac).
Philosophical Transactions of the Royal Society London B: Biological Sciences 356: 1159-1186.
PubMed
- Kötter R, Stephan KE, Palomero-Gallagher N, Geyer S, Schleicher A, Zilles K (2001) Multimodal characterisation of cortical areas by multivariate analyses of receptor binding and connectivity data. Anatomy & Embryology 204: 333-350.
PubMed
- Stephan KE, Magnotta VA, White TJ, Arndt S, Flaum M, O'Leary DS, Andreasen NC (2001) Effects of Olanzapine on cerebellar functional connectivity in schizophrenia measured by fMRI during a simple motor task. Psychological Medicine 31: 1065-1078.
PubMed
- Burns GAPC, Stephan KE, Ludäscher B, Gupta A, Kötter R (2001) Towards a federated neuroscientific knowledge management system using brain atlases. Neurocomputing 38-40: 1633-1641.
ScienceDirect
- Kötter R, Hilgetag CC, Stephan KE (2001) Connectional characteristics of areas in Walker's map of primate prefrontal cortex. Neurocomputing 38-40: 741-746.
ScienceDirect
- Bozkurt A, Kamper L, Stephan KE, Kötter R (2001) Organization of primate amygdalo-prefrontal projections. Neurocomputing 38-40: 1135-1140.
ScienceDirect
- Northoff G, Richter A, Gessner M, Schlagenhauf F, Fell J, Baumgart F, Kaulisch T, Kötter R, Stephan KE, Leschinger A, Bargel B, Witzel T, Hinrichs H, Bogerts B, Scheich H, Heinze HJ (2000) Functional dissociation between medial and lateral orbitofrontal cortical spatiotemporal activation in negative and positive emotions: a combined fMRI/MEG study. Cerebral Cortex 10: 93-107.
PubMed
- Stephan KE, Zilles K, Kötter R (2000a) Coordinate-independent mapping of structural and functional data by Objective Relational Transformation (ORT). Philosophical Transactions of the Royal Society London B: Biological Sciences 355: 37-54.
PubMed
- Stephan KE, Hilgetag CC, Burns GAPC, O'Neill MA, Young MP, Kötter R (2000b) Computational analysis of functional connectivity between areas of primate cerebral cortex. Philosophical Transactions of the Royal Society London B: Biological Sciences 355: 111-126.
PubMed
- Stephan KE, Kötter R (1999) One cortex - many maps: an introduction to coordinate-independent mapping by Objective Relational Transformation (ORT). Neurocomputing 26-27: 1049-1054.
ScienceDirect
- Kötter R, Stephan KE (1997) Useless or helpful? The "limbic system" concept. Reviews in the Neurosciences 8: 139-145.
PubMed