Contact Details

Curriculum Vitae

PhD student

Current Research Projects

Inter- and intrahemispheric connectivity of the language system in subjects with auditory verbal hallucinations, investigated with DTI, MTI, fMRI and TMS.

Concurrent TMS-fMRI: Modulating resting state with TMS during fMRI acquisition

List of Publications

• de Weijer AD, Neggers SW, Diederen KM, Mandl RC, Kahn RS, Hulshoff Pol HE, Sommer IE
  Aberrations in the Arcuate Fasciculus are Associated with Auditory Verbal Hallucinations in Psychotic and in Non-psychotic Individuals
  Hum Brain Mapp 2011 Nov 23
• Slotema CW, Blom JD, de Weijer AD, Hoek HW, Sommer IE.
  Priming does not enhance the efficacy of 1 hertz repetitive transcranial magnetic stimulation for the treatment of auditory verbal hallucinations: results of a randomized controlled study.
  Brain Stimul. 2011 Oct 31.
• de Weijer AD, Mandl RC, Diederen KM, Neggers SW, Kahn RS, Hulshoff Pol HE, Sommer IE
  Microstructural alterations of the arcuate fasciculus in schizophrenia patients with frequent auditory verbal hallucinations
  Schizophr res. 2011 Aug; 130(1-3):68-77
• Diederen KM, Daalman K, de Weijer AD, Neggers SF, van Gastel W, Blom JD, Kahn RS, Sommer IE
  Auditory Hallucinations Elicit Similar Brain Activation in Psychotic and Nonpsychotic Individuals.
  Schizophr Bull. 2011 Apr 28.
• Daalman K, Boks MP, Diederen KM, de Weijer AD, Blom JD, Kahn RS, Sommer IE.
  The same or different? A phenomenological comparison of auditory verbal hallucinations in healthy and psychotic individuals.
  J Clin Psychiatry. 2011 Mar;72(3):320-5. 
• Slotema CW, Blom JD, de Weijer AD, Diederen KM, Goekoop R, Looijestijn J, Daalman K, Rijkaart AM, Kahn RS, Hoek HW, Sommer IE.
  Can Low-Frequency Repetitive Transcranial Magnetic Stimulation Really Relieve Medication-Resistant Auditory Verbal Hallucinations? Negative Results from a Large Randomized Controlled Trial.
  Biol Psychiatry. 2010 Dec 6.
• Diederen KM, De Weijer AD, Daalman K, Blom JD, Neggers SF, Kahn RS, Sommer IE.
  Decreased language lateralization is characteristic of psychosis, not auditory hallucinations.
  Brain. 2010 Dec;133(Pt 12):3734-44.
• de Weijer AD, Mandl RC, Sommer IE, Vink M, Kahn RS, Neggers SF.
  Human fronto-tectal and fronto-striatal-tectal pathways activate differently during anti-saccades.
  Front Hum Neurosci. 2010 May 26;4:41.
•  Sommer IE, Derwort AM, Daalman K, de Weijer AD, Liddle PF, Boks MP.
  Formal thought disorder in non-clinical individuals with auditory verbal hallucinations.
  Schizophr Res. 2010 May;118(1-3):140-5.
• Schutter DJ, de Weijer AD, Meuwese JD, Morgan B, van Honk J (2008). Interrelations between motivational stance, cortical excitability, and the frontal electroencephalogram asymmetry of emotion: A transcranial magnetic stimulation study. Hum Brain Mapp 29(5):574-8
• Sommer IE, Slotema CW, de Weijer AD, Blom JD, Daalman K, Neggers SF, Somers M, Hoek HW, Aleman A, Kahn RS (2007). Can fMRI-guidance improve the efficacy of rTMS treatment for auditory verbal hallucinations? Schizophr Res 93(1-3):406-8

 Conference Oral Presentations

• Subregions in the frontal eye fields projecting to the superior colliculus are crucial in making anti-saccades: an fMRI-DTI study. Organization for Human Brain Mapping (OHBM) 14^th Annual Meeting, june 15-19 2008, Melbourne Australia
• Aberrations in the Arcuate Fasciculus are Associated with Auditory Verbal Hallucinations in Psychotic and in Non-psychotic Individuals
  3^rd European Conference on Schizophrenia Research (ECSR), 29 September - 1 October 2011, Berlin Germany