Papers read

 1972
- Microchemisch en histochemisch onderzoek van de hypofyse achterkwab in de rat na activering. Vergadering Sectie Vergelijkende Endocrinologie, Ned. Ver. v. Endocrinologie, Amsterdam, April 22, 1972.
- Changes in enzyme activities of the neurohypophysis after influencing the HNS of the rat. IVth British Dutch Endocrine Meeting, Hull, September 4 7, 1972.

1973
- Lysosomale enzymactiviteitsveranderingen in de neurohypofyse van de rat tijdens activering van het hypothalamus neurohypofyse systeem. 14e Federatieve Vergadering van medisch biologische verenigingen, Groningen, April 266 28, 1973.
- Does the hypothalamo neurohypophyseal system play a role in gestation length or the course of parturition? 8th Int. Summer School of Brain Research, Baarn, June 25 29, 1973.

1974
- On a role of the pituicytes in the release phenomena of the hypothalamo neurohypophyseal system of the rat. Fachbereich Biologie (Prof.dr. Ch. Pilgrim), Universität Regensburg, December 14, 1974.
- The microisolation of pituicytes and axonal endings from the rat neural lobe. 15e Federatieve Vergadering van medisch biologische verenigingen, Nijmegen, April 17 20, 1974.

1975
- Cellular localization of the neurohypophyseal acid phosphatase activity increase following water deprivation of the rat. 16e Federatieve Vergadering van medisch biologische verenigingen, Utrecht, April 2 4, 1975.

1976
- Glia/neuron interactions in the rat neurohypophysis. 17e Federatieve Vergadering van medisch biologische verenigingen. Amsterdam, April 21 23, 1976.
- How are pituicytes involved in neurohypophyseal secretion? Medical Research Council Laboratories (Dr. R. Balázs), Carshalton, June 15, 1976.
- How are pituicytes involved in neurohypophyseal secretion? Department of Anatomy (Dr. B.T. Pickering), University of Bristol, Bristol, June 16, 1976.
- Acid phosphatase in rat neurohypophyseal fractions enriched for neurosecretosomes and pituicytes. Vth Int. Congress of Endocrinology, Hamburg, July 18 24, 1976.
- Microchemie van de ratteneurohypofyse. Symposium "Neurosecretie", Ned. Ver. v. Celbiologie, Amsterdam, December 17, 1976.

1977
- G.J. Boer, Biochemie in de neuroendocrinologie. Cursus Neuroendocrinologie, post academisch onderwijs. Biologische Raad van de KNAW, Amsterdam, August 8 12, 1977.

1978
- Fixation of neuropeptides in polyacrylamide slab gels after electrofocussing. 19e Vergadering van medisch wetenschappelijke verenigingen, Rotterdam, March 29 31, 1978.
- Postnatal brain development in the absence of vasopressin. VIIth Dutch British Endocrine Meeting, Maastricht, August 30 September 2, 1978.
- How are pituicytes involved in neurohypophysial secretion? Workshop organized by IBRO and ESN "Neuronal Secretion in Physiological and Pathological States", Antwerpen, September 11 14, 1978.
- Hersenontwikkeling in afwezigheid van vasopressine. Vergadering werkgroep "Hormonen en hersenfuncties", Amsterdam, October 2, 1978.
- Vasopressine ne de ontwikkeling van de hersenen van de rat. Colloquium Endocrinologie, Erasmus Universiteit Rotterdam, November 10, 1978.
- Specificiteit in neuropeptiden immunocytochemie. Werkgroep "Cytofotometrie en Cytometrie", Ned. ver. v. Celbiologie, Rijswijk, December 1, 1978.

1979
- Neuropeptiden en hersenontwikkeling. Vergadering Ned. Ver. v. Endocrinologie, Academisch Ziekenhuis Utrecht, March 17, 1979.
- Problemen van specificiteit in de immunocytochemie. Cursus Neurochemie, Universiteit van Utrecht, June 12, 1979.
- Neuropeptides and brain development. VIIth Meeting of the Int. Soc. for Neurochemistry, Jerusalem, Israel, September 2 6, 1979.
- Brain development in the absence of vasopressin. Medical Research Council, Developmental Neurobiology Unit (Dr. R. Balázs), London, October 2, 1979.
- Neuropeptides in rat brain development. XIth Int. Summer School of Brain Research `Adaptive Capabilities of the Nervous System', Amsterdam, August 13 17, 1979.

1980
- Peptides and brain development. 21st Dutch Federative Meeting, Nijmegen, April 9 11, 1980.
- Identification of tissue antigens as part of a serum specificity test for immunocytochemistry. EMBO practical course `Immunocytochemistry and its applications in brain research', Amsterdam, May 27 30, 1980.
- Regulation of brain growth by neurotransmitters, hormones and neurohormones. Neurochemie 1980, Ver. Exp. Klin. Neurochemie, Utrecht, June 4, 1980.
- Vasopressin release from Accurel in vitro and in vivo. AKZO Research Centre, Arnhem, November 28, 1980.

1981
- Vasopressin release from Accurel in vitro and in vivo II, AKZO Research Centre, Arnhem, June 2, 1981.
- Brain development of the Brattleboro diabetes insipidus rat. Int. Symp. on the Brattleboro rat, Hanover, NH, USA, September 5 7, 1981.
- Neuropeptides and brain development: the Brattleboro rat as a model. Department of Anatomy, University of Rochester (Dr. D.M. Gash), Rochester, NY, USA, September 15, 1981.
- Hersenfuncties en de betekenis van neuropeptiden. PAO cursus "Nieuwe ontwikkelingen in de neuroendocrinologie", Vrije Universiteit, Amsterdam, October 3, 1981.
- Toepassingsmogelijkheden en gevaren van neuropeptiden. PAO cursus "Nieuwe ontwikkelingen in de neuroendocrinologie", Vrije Universiteit, Amsterdam, October 3, 1981.

1982
- Vasopressin release from Accurel in vitro and in vivo, AKZO Research Centre, Arnhem, February 4, 1982.
- Neuropeptides and brain development. Medical School, University of Rochester, Rochester, NY, USA, February 22, 1982.
- Vasopressin and the developing brain. Dept. of Anatomy, University of Rochester (Dr. D.M. Gash), Rochester, NY, USA, February 24, 1982.
- Long term effects on brain and behavior of early treatments with neuropeptides. Int. Workshop on `Application of Behavioral Pharmacology in Toxicology', Capri, Italy, April 26 28, 1982.

1983
- Effecten van neuropeptiden in de groei en ontwikkeling van de hersenen. FUNGO Werkgemeenschap "Ontwikkeling en Veroudering Zenuwstelsel en Gedrag", Amsterdam, February 4, 1983.
- Vasopressin, a factor in brain development? Dept. of Anatomy, University of Rochester (Dr. D.M. Gash), Rochester, NY, USA, July 1, 1983.

1984
- A new controlled drug delivery device based on Accurel polypropylene; studies with vasopressin. Massachusetts Institute of Technology (Prof.dr. R.S. Langer), Dept. of Nutrition and Food Science, Boston, MA, USA, January 16, 1984.
- Vasopressin and brain development. Vth Annual Neuropeptide Winterconference, Breckenridge, CO, USA, January 18 21, 1984.
- A role for vasopressin in brain development. National Institute of Health (Dr. G.E. Handelmann), Washington DC, January 23, 1984.
- Neuropeptides in development, IXth Anglo Dutch Endocrine Meeting, Leeds, September 12 14, 1984.
- Groei en ontwikkeling van de hersenen. College cyclus "Groei en Ontwikkeling", Fac. Geneeskunde, Universiteit van Amsterdam, January 12, 1984.

1985
- Neuropeptidergic effects on brain development to be expected on the basis of knowledge in behavioral teratology. Winter Neuropeptide Conference, Breckenridge, CO, USA, January 23 26, 1985.
- Vasopressin and brain development. VA Medical Center (Dr. D.M. Dorsa), Seattle, USA, January 28, 1985.
- Vasopressin and brain development. Laboratory of Neuroendocrinology (Dr. B.S. McEwen), Rockefeller University, NY, USA, January 31, 1985.
- Development of transplanted vasopressin neurons in the vasopressin deficient brain of young Brattleboro rats. 26th Dutch Federation Meeting, April 11 12, 1985.
- A new controlled drug delivery system for peptides; application and potentialities. Population Council, Rockefeller University (Dr. K. Sundaram), New York, USA, October 31, 1985.

1986
- Release of peptides from Accurel polypropylene fiber devices: a new controlled drug delivery technique. Symposium "Endogene peptiden en hun toedieningsvormen", Leiden, November 28, 1986.
- Overleving van vasopressine neuronen in hypothalame transplantaten in jonge vasopressine deficiënte Brattleboro ratten. Meeting MEDIGON group "Development and Aging of the Nervous Systen and Behavior", Amsterdam, October 12, 1986.

1987
- Biochemical aspects underlying the effects of drugs on the developing brain. 39ste Herhalingscursus Kindergeneeskunde, Amsterdam, May 11 15, 1987.
- Transplantation of central neurons and regeneration of central dysfunction. Minisymposium Dutch Soc. Exp. Clin. Neurochemistry, Utrecht, August 26 28, 1987.
- Neuropeptides and functional neuroteratology. 15th Int. Summer School of Brain Research, Amsterdam, August 31 September 4, 1987.
- Controlled peptide delivery using Accurel polymers. Symposium `Disposition and delivery of peptide drugs', Leiden, September 5 6, 1987.
- Vasopressin and its possible function in brain development. ENA/RPS Neuroscience Symposium `Central neuropeptides: from gene to behaviour', Paris, October 26 27, 1987.
- Transplantatie in de hersenen als mogelijkheid tot centrale regeneratie'. Afd. Neurologie en Neurochirurgie (Prof.dr. H. Carton), Univ. Ziekenhuis Gasthuisberg, Leuven, October 8, 1987.

1988
- Funktionele neuroteratologie van het vasopressine en noradrenaline systeem bij de rat. Neurochemiedag, Dutch Soc. Exp. Clin. Neurochemistry, Amsterdam, January 29, 1988.
- Vasopressine en de ontwikkeling van de biochemische organisatie van perifere en centrale vasopressine systemen. DWGM Medigon `Ontwikkeling en veroudering zenuwstelsel en gedrag', Utrecht, February 12, 1988.
- De toekomst van hersenweefseltransplantatie bij de ziekte van Parkinson, Merck Sharp & Dohme B.V., Minisymposium `De therapeutische benadering van de ziekte van Parkinson: medicatie of chirurgie, Amsterdam, April 11, 1988.
- De toekomst van hersenweefseltransplantatie bij de ziekte van Parkinson. Bijeenkomst Neurologenvereniging, Paterswolde, May 31, 1988.
- Inleiding tot de hersenweefseltransplantatie. Bijeenkomst Werkgroep 'Parkinson en Transplantatie', Amsterdam, June 16, 1988.
- Exogene beïnvloeding van het gedrag experimentele aspecten. Workshop Klinische Teratologie, Oudkerk, October 7, 1988.
- Onderzoek naar hersenceltransplantatie. Najaarsvergadering Parkinson Patiënten Vereniging, Bunnik, October 10, 1988.
- De Brattleboro rat als model voor de studie van de waterhuishouding en vasopressine. Instituut voor Epilepsiebestrijding "Meer en Bosch" (Prof.dr. H. Meinardi) Heemstede, October 31, 1988.
- Nieuwe basale aspecten van de toepassing van transplantatie bij Parkinson, Vergadering werkgroep Parkinson en Transplantatie, Amsterdam, December 7, 1988.

1989
- Evaluatie Parkinson en Transplantatie, Meeting Medical Ethical Committee of Dutch National Health Council, The Hague, February 3, 1989.
- Neonatal vasopressin treatment of rat failed to impair diuresis and passive avoidance behavior in adulthood. Symp. Fundamental Clinical Pharmacology, Paris, March 2 3, 1989.

1990
- Transplantation of the clock. First Erasmus Winter School, Leiden, February 7-11, 1990.
- Anatomical and functional aspects of SCN grafting in rat. Dept. Anatomy and Cell Biology (Dr. M. Lehmann), Univ. of Cincinnati. Medical College Cincinnati, OH, March 14, 1990.
- Anatomical and functional aspects of SCN grafting. Dept. Neurobiology and Anatomy (Prof. Dr. D.M. Gash), University of Rochester, Rochester, NY, March 23, 1990.
- Brain development and the influence of chemicals and environment. In lecture series on "Plasticity of the nervous system", Neurosciences Amsterdam, Amsterdam, May 7, 1990.
- Lasting effects of early noradrenergic receptor occupation on brain noradrenaline turnover and on beta-receptors. Second Congress European Society for Developmental Pharmacology, Tremezzo, Italy, May 17-19, 1990.
- Grafting of fetal suprachiasmatic tissue in the brain of Brattleboro and arrythmic Wistar rat, Department of Anatomy (Prof. Dr. Y. Ibata), Kyoto Prefectural University of Medicine, Kyoto, Japan) September 13, 1990.
- Neuropeptides: a new class of neurotransmitters, a new class of functional teratogens. Satellite symposium of the 17th International Congress of CINP on Functional Neuroteratology of short-term exposure of drugs, Tokyo, Japan, September 16-18, 1990.
- Grafting of fetal suprachiasmatic tissue; explanations for the functional aspects in recovery of arhythmicity, Mitsubishi Kasei Institute of Life Sciences (Prof. Dr. I. Kamamura), Tokyo, Japan, September 17, 1990.
- Neurotransplantatie: basale studies en de mogelijkheden voor klinische toepassingen. Capita Selecta, Faculty of Medicine, Erasmus University, Rotterdam, November 28, 1990.

1991
- Blijvende effecten van geneesmiddelen op de hersenontwikkeling. Symposium van het Nederlands Natuur- en Geneeskundig Congres "Ontwikkeling en Veroudering van Hersenen", Amsterdam, The Netherlands, January 25, 1991.
- Transplantatie van de suprachiasmatische kern in het kader van circadiaan onderzoek. Meeting NWO deelwerkgemeenschap 'Ontwikkeling en Veroudering van Zenuwstelsel en Gedrag', Amsterdam, February 15, 1991.
- Functional significance of neurotransmitter/neuromodulator receptors in the ontogeny of the brain. 46ème Réunion de l'Association Française des Pharmacologistes, Tours, France, October 17-18, 1991.
- Legality of the use of fetal material for grafting; survey of the variety of European guidelines. Founding conference of the Network of European CNS Transplantation and Regeneration (NECTAR) Paris, France, May 10-11 (1991).

1992
- Proposal for NECTAR ethical guidelines for the retrieval and use of human embryonic and fetal donor tissue for experimental and clinical neurotransplantation and research. NECTAR conference, Milan, Italy, January 24-26 (1992).
- Developmental neurobiochemistry. European Graduate School of Child Neuropsychology, Duivendrecht, The Netherlands, October 1, 1992.

1993
- Functional neuroteratology. European Graduate School of Child Neuropsychology, Duivendrecht, The Netherlands, February 4.
- Drugs and functional neuroteratogenesis. Session Entwicklungsneuroendokrinologie, 37 Symposium Deutsche Gesellschaft für Endokrinologie, Berlin, March 3-6.
- Evaluation of ethical guidelines on the retrieval and use of human embryos or fetuses within NECTAR. NECTAR Meeting, Brussels, August 27-28.
- Developmental Neurobiology. European Graduate School of Child Neuropsychology, Duivendrecht, The Netherlands, September 16.
- Transplantation of the suprachiasmatic nucleus; functional aspects. Meeting of NWO werkgemeenschappen 'Development and Aging of CNS and Behavior' and 'Motor Behavior', Kerkrade, The Netherlands, December 9-10.

1994
- The (non-synaptic) role of neurotransmitters in brain development. Graduate School Neurosciences Amsterdam, The Netherlands, January 14.
- Transplantation of the SCN, present results and future steps, Lab. Physiology, University of Leiden, The Netherlands, February 11.
- Prenatal poisoning, European Graduate School of Child Neuropsychology, Duivendrecht, The Netherlands, April 28.
- De ontwikkelingen na de eerste implantaties bij Parkinson patiënten, Parkinson Patiënten Vereniging, Bunnik, The Netherlands, May 28.
- Neural or neurohumoral recovery of circadian activity by SCN grafting in SCN-lesioned rat, 5th Int. Symp. Neural Transplantation. Chaternay-Malabry, France, June 25-29.
- The key issues of embryonic and fetal tissue transplantation, a response for the discussion, Int. Symp. on Ethics in Medicine & Reproductive Medicine, Paris, France, July 6-8.
- Developmental Neurobiochemistry, European Graduate School of Child Neuropsychology, Duivendrecht, The Netherlands, September 16.
- Functional transplantation of the biological clock in rats, Division of Surgical Research, Hospital Center of the University of Vaudois (CHUV), Lausanne, December 7.
- Ethical issues in brain grafts of embryonic cells. European Multidiciplinary Workshop on 'Ethical Aspects of Brain Research', Rome, Italy, December 15-17.

1995
- Ethical guidelines of NECTAR for neurotransplantation and the state of the art within the EU, Symposium 'Neurotransplantation als neuartiges Therapie-konzept bei Morbus Parkinson: Klinisch-wissenschaftliche und ethisch-moralische Aspekte', Hannover, January 28-29.
- The (non-synaptic) role of neurotransmitters in brain development. Graduate School Neurosciences Amsterdam, The Netherlands, January 31.
- Introduction to Controversies in the Neuroscience 2 "Gentherapie: een positieve ontwikkeling voor de neurologische patiënt". Amsterdam, Februari 16.
- Prenatal poisoning, European Graduate School of Child Neuropsychology, Duivendrecht, The Netherlands, March 2.
- Ex vivo gene delivery to fetal transplants. NECTAR Subgroup on Gene Therapy, Veyrier du Lac, June 26-27.
- Developmental Neurobiochemistry, European Graduate School of Child Neuropsychology, Duivendrecht, The Netherlands, September 15.
- Ethical aspects of grafting in Huntington's disease, NECTAR Annual General Meeting, Maastricht, October 27-29.

1996
- The (non-synaptic) role of neurotransmitters in brain development, Graduate School Neurosciences Amsterdam, Amsterdam, The Netherlands, February.
- Developmental Toxicology, European Graduate School of Child Neurophychology, Duivendrecht, The Netherlands, March 14.
- Developmental neurochemistry, European Graduate School of Child Neuropsychology, Duivendrecht, The Netherlands, September.
- The self-restraining ethical guidelines of NECTAR for the clinical neurotransplantation investigations, Cognitio Humana - Dynamik des Wissens und der Werte, XVII German Congress for Philosophy, Leipzig, Germany, September.

1997
- The (non-synaptic) role of neurotransmitters in brain development, Graduate School Neurosciences Amsterdam, Amsterdam, The Netherlands, February.
- Developmental Toxicology, European Graduate School of Child Neurophychology, Duivendrecht, The Netherlands, March.
- The use of human fetal tissue for medical purposes, National Health Council Meeting, Utrecht, June.
- Developmental neurochemistry, European Graduate School of Child Neuropsychology, Duivendrecht, The Netherlands, September.
- The use of embryonal and fetal brain tissue allo- and xenografts in human: the practice of the risk-benefit ratio ethical approach, First World Conference on Ethics codes in Medicine and Biotechnology, Freiburg, Germany, October.

1998
- The (non-synaptic) role of neurotransmitters in brain development, Graduate School Neurosciences Amsterdam, Amsterdam, The Netherlands, February.
- Developmental Toxicology, European Graduate School of Child Neurophychology, Duivendrecht, The Netherlands, March.
- Developmental neurochemistry, European Graduate School of Child Neuropsychology, Duivendrecht, The Netherlands, September
- Personal identity and neurotransplantation, XV European Conference on Ethics and Mental Health, Rome, Italy, October.
- Molecular and Cellular strategies to stimulate regeneration in the peripheral and central nervous system, Graduate School Nijmegen, Nijmegen, The Netherlands,

1999
- Prenatal poisoning, European Graduate School for Child Neurophysiology, Duivendrecht, The Netherlands,
- Neurotransplantation, Graduate School Neurosciences Amsterdam, Amsterdam, The Netherlands, February.
- Attitude towards medical ethics in the Netherlands, Meeting on Medical ethics in the media, Center for Health Ethics, Evangelischen Akademie, Loccum, Germany,
- Statement on the possibilities of cell cloning in neurotransplantation as repair surgery, Meeting on Cloning, Institute of Health Ethics Maastricht and Rathenau Institute Amsterdam, Maasticht, The Netherlands, April,
- Neurotransplantation, Concluding Conference of Brain ELSA (Ethical, legal and social aspects of brain research), Paris, France, May
- An ethical view on cloning, Discussion Meeting on Cloning, Humanistic League Groningen and Rathenau Institute Amsterdam, Groningen, The Netherlands, June
- Developmental neurochemistry, European Graduate School of Child Neuropsychology, Duivendrecht, The Netherlands, September
- Brain development and functional teratology, APO Course Psychiatry, Academic Medical Center, Amsterdam, The Netherlands,

2000
- Sham surgery in EFTT trials in Parkinson’s disease, Workshop EC BIOMED project ‘Ethical guidance on the use of human embryonic and fetal tissue transplantation’, Barcelona, Spain, January
- Prenatal poisoning, European Graduate School for Child Neurophysiology, Duivendrecht, The Netherlands,
- Recommendations for the ethical guidance in EFTT - requirements of pre-clinical and clinical studies, Workshop EC BIOMED project ‘Ethical guidance on the use of human embryonic and fetal tissue transplantation’, Amsterdam, The Netherlands, October
- Brain development and functional teratology, APO Course Psychiatry, Academic Medical Center, Amsterdam, The Netherlands,
- Neurotransplantation, what to expect? 4th Dutch Endo-Neuro Meeting, Doorwerth, The Netherlands, June 5-7.
- Ex vivo and in vivo viral vector-mediated NT-3 gene transfer promotes the regenerative effects of Schwann cell-containing implants used as bridge to repair transected rat spinal cord, 11th NECTAR Meeting, Hannover, September 15-17.
- Therapy for damage to the nervous system with a little help from cells and genes?, Autumn Meeting ‘Revalidation in the year 2000' of the Netherlands Institute for Psychology, Nijmegen-Berg en Dal, The Netherlands, November 17-18.
- Viral vector-mediated expression of neurotrophins in the rat spinal cord lesion model, EKN 30th Anniversary Meeting, Beerse, Belgium, December 8.

2001
- Strategies to repair the injured brain: genetic therapies and nerve transplantation, Graduate School Neuroscience Amsterdam, Amsterdam, The Netherlands, February 21.
- Clinical neurotransplantation, an update on the ethical issues, 7th World Congress of Biological Psychiatry, Berlin, Germany, July 1-6.
- Neurotransplantation, the use of fetal brain tissue and stem cells, Fronteiras da Biomedicina, Transpantes de celulas fetais e tecidos embriondrios, Ponta Delgada, Azores, Portugal, September, 20-22

2002
- Strategies to repair the injured brain: genetic therapies and nerve transplantation, Graduate School Neuroscience Amsterdam, Amsterdam, The Netherlands, February .
- The progress and problems of regeneration of spinal cord injury by gene therapy and cell implants, Symposium From Brain Plasticity to Neuronavigation, Gent, Belgium, 20 September 2002.
- An update of the NECTAR Guidelines for the use of prenatal tissues in vieuw of the use of stem cells, 13th NECTAR Meeting, Amsterdam, 12-14 December 2002
- The rationale for disease-dedicated core assessment protocols, 13th NECTAR Meeting, Amsterdam, 12-14 December 2002
- Stem cells, brain and society, Neurofederation Autumn Symposium “Stem Cells for and Stem Cells of The Brain”, Amsterdam, 16 December 2002

2003
- Strategies to repair the injured brain: genetic therapies and nerve transplantation, Graduate School Neuroscience Amsterdam, Amsterdam, The Netherlands, February 17 .
- GNeurotransplantation of fetal tissues, how and what? Meeting ‘Gender Democratic Labyrinth’, University of Maastricht, Maastricht, 14 February 2003
- The prospects for cellular and gene therapeutic strategies in brain repair, Symposium ‘Technical Medicine’, University of Twente, Enschede, 1 September 2003
- Cells, genes and scaffolds, repair options for the injured and degenerated nervous system, 13th Annual Meeting of the European Tissue Repair Society, Amsterdam, 21-23 September 2003
- Ethics surrounding the using stem cells for research and medicine, Hearing of the United European Left-Nordic Green Left (GUE-NGL) Group of the European Parliament, Brussels, 11 November 2003
- Gene transfer in models of spinal cord injury, 14th NECTAR Meeting, Amsterdam, 4-6 December 2003

2004
- Stamcellen voor hersenweefsel kan niet zonder embryo, Contribution at presentation of publication of M. Huijer and K. Horstman, Factor XX: Vrouwen, Eicellen en Genen, Uitgeverij Boom, Amsterdam, 26 May 2004
- The prospects for cellular and gene therapeutic strategies in brain repair, Symposium ‘Technical Medicine’, University of Twente, Enschede, 6 September 2004
- Wat kan de dwarslaesiepatient verwachten van de dierstudies? Waar wachten we eigenlijk op?, Schakeldag 2004, DON, Utrecht, 2 October 2004
- Closing words at the ‘Hersenpublieksdag’ entitled 'Hersenen, de slimste computer, over verbindingen en netwerken in de hersenen' of the Dutch Brain Foundation, Utrecht, 7 October 2004
- How to promote the interdisciplinary perspective of fMRI and other imaging techniques in Neuroscience NL?, Symposium ‘Applications of fMRI on neurocognitive and medical research, an interdisciplinary perspective’, Amsterdam, 9 November 2004
- EU and national legislation: a view and an update, 15th NECTAR Meeting, Brussels, 2-4 December 2004

2007
- BCN, TomTom and Tom Poes, BCN Newyears Meeting, Groningen, 1 February 2007
- Schade in het zenuwstelsel, recente en toekomstige ontwikkelingen voor herstel, NVON congres “Bron van Ontdekkingen”, Leiden, 23 March 2007
- Sham-controlled double-blind study design is the gold standard in human research but is it always acceptable in experimental gene transfer? A plea for Core Assessment Protocols, CLINIGENE/CONSERT think tank, The ethics of human clinical gene transfer: “On route to ethical recommendations for gene transfer clinical trials”, Geneva, Switserland, 2-3 April 2007

2011
- CAP rather than SHAM, Workshop on ethical and societal aspects of stem cell therapy in Parkinson's and Huntington's patients, Lund, Sweden, May 30-June 1 2011

2013
- Bioethical aspects of stem cell research and use, Workshop 'Mobilizing stem cells: production and tourism in the human stem cell economy', Lund, Sweden, 17 October 2013

2017
- Breingroei, fijngevoeliger dan je denkt, bijeenkomst Probus, Huizen, 7 February 2017

2018
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De fijne gevoeligheden van de hersenontwikkeling, de basis van blijvende functionele veranderingen. Rotary Club Weesp, 24 september 2018