Michael-Paul Schallmo, Ph.D.

Assistant Professor, Department of Psychiatry

Research Interests:

Dr. Schallmo's interests include:

  • Disrupted perception in psychosis and autism spectrum disorders (ASD)
  • The role of different neurotransmitters (e.g., GABA, glutamate) in psychosis and ASD
  • Visual neuroscience as a tool to examine specific hypotheses about the neural mechanisms of psychiatric disorders
  • Combining methods (e.g., functional MRI, EEG, MR spectroscopy, visual psychophysics, pharmacology) to study a single research question in human subjects

Selected Publications


(For a comprehensive list of recent publications, refer to PubMed, a service provided by the National Library of Medicine.)

  • Montoya SA, Mulder CB, Lee MS, Schallmo MP, Engel SA. Adapting to visual noise alleviates visual snow. Invest Ophthalmol Vis Sci. 2023 Dec 1;64(15):23.
  • Schallmo MP, Weldon KB, Kamath RS, Moser HR, Montoya SA, Killebrew KW, Demro C, Grant AN, Marjańska M, Sponheim SR, Olman CA. The psychosis human connectome project: Design and rationale for studies of visual neurophysiology. Neuroimage. 2023 May 15;272:120060.
  • Demro C, Mueller BA, Kent JS, Burton PC, Olman CA, Schallmo MP, Lim KO, Sponheim SR. The psychosis human connectome project: An overview. Neuroimage. 2021 Nov 1;241:118439.
  • Schallmo MP, Weldon KB, Burton PC, Sponheim SR, Olman CA. Assessing methods for geometric distortion compensation in 7 T gradient echo functional MRI data. Hum Brain Mapp. 2021 Sep;42(13):4205-4223.
  • Ramsay IS, Schallmo MP, Biagianti B, Fisher M, Vinogradov S, Sponheim SR. Deficits in auditory and visual sensory discrimination reflect a genetic liability for psychosis and predict disruptions in global cognitive functioning. Front Psychiatry. 2020 Jul 7;11:638.
  • Murray SO, Kolodny T, Schallmo MP, Gerdts J, Bernier RA. Late fMRI response components are altered in autism spectrum disorder. Front Hum Neurosci. 2020 Jun 30;14:241.
  • Schallmo MP, Kolodny T, Kale AM, Millin R, Flevaris AV, Edden RAE, Gerdts J, Bernier RA, Murray SO. Weaker neural suppression in autism. Nat Commun. 2020 May 29;11(1):2675.
  • Kolodny T, Schallmo MP, Gerdts J, Edden RAE, Bernier RA, Murray SO. Concentrations of Cortical GABA and glutamate in young adults with autism spectrum disorder. Autism Res. 2020 Apr 16. doi: 10.1002/aur.2300.
  • Kolodny T, Schallmo MP, Gerdts J, Bernier RA, Murray SO. Response dissociation in hierarchical cortical circuits: a unique feature of autism spectrum disorder. J Neurosci. 2020;40(11):2269-2281.
  • Schallmo M-P, Kale AM, Murray SO. The time course of different surround suppression mechanisms. J Vis. 2019 Apr 1;19(4):12.
  • Mikkelsen M, Rimbault DL, Barker PB, Bhattacharyya PK, Brix MK, Buur PF, … Schallmo M-P, … Edden RAE. Big GABA II: Water-referenced edited MR spectroscopy at 25 research sites. Neuroimage. 2019 May 1;191:537-548.
  • Schallmo M-P, Millin R, Kale AM, Kolodny T, Edden RAE, Bernier RA, Murray SO. Glutamatergic facilitation of neural responses in MT enhances motion perception in humans. NeuroImage. 2019;184:925-931.
  • Millin R, Kolodny T, Flevaris AV, Kale AM, Schallmo M-P, Gerdts J, Bernier RA, Murray S. Reduced auditory cortical adaptation in autism spectrum disorder. eLife. 2018;7: e36493.
  • Murray SO, Schallmo M-P, Kolodny T, Millin R, Kale A, Thomas P, Rammsayer TH, Troche SJ, Bernier RA, Tadin D. Sex differences in visual motion processing. Curr Biol. 2018;28(17):2794-2799.
  • Schallmo M-P, Kale AM, Millin R, Flevaris AV, Brkanac Z, Edden RA, Bernier RA, Murray SO. Suppression and facilitation of human neural responses. eLife. 2018;7: e30334.
  • Quevedo K, Harms M, Sauder M, Scott H, Mohamed S, Thomas KM, Schallmo M-P, Smyda G. The neurobiology of self face recognition among depressed adolescents. J Affect Disord. 2018;229:22-31.
  • Olman CA, Bao P, Engel SA, Grant AN, Purington C, Qiu C, Schallmo M-P, Tjan BS. Hemifield columns co-opt ocular dominance column structure in human achiasma. NeuroImage. 2018;164:59-66.
  • Mikkelsen M, Barker PB, Bhattacharyya PK, Brix MK, Buur PF, Cecil KM, … Schallmo M-P, … Edden RAE. Big GABA: Edited MR spectroscopy at 24 research sites. NeuroImage. 2017;159:32-45.
  • Dawson EL, Caveney AF, Meyers KK, Weisenbach SL, Giordani B, Avery ET, Schallmo M-P, Bahadori A, Bieliauskas LA, Mordhorst M, Marcus SM, Kerber K, Zubieta JK, Langenecker SA. Executive functioning at baseline prospectively predicts depression treatment response. Prim Care Companion CNS Disord. 2017;19(1). doi: 10.4088/PCC.16m01949.
  • Schallmo M-P, Grant AN, Burton PC, Olman CA. The effects of orientation and attention during surround suppression of small image features: A 7 Tesla fMRI study. J Vis. 2016 Aug 1;16(10):19. doi: 10.1167/16.10.19.
  • Schallmo M-P, Murray SO. Identifying separate components of surround suppression. J Vis. 2016;16(1):2. doi: 10.1167/16.1.2.
  • Schallmo M-P, Sponheim SR, Olman CA. Reduced contextual effects on visual contrast perception in schizophrenia and bipolar affective disorder. Psychol Med. 2015;45(16):3527-3537.
  • Schallmo M-P, Kassel MT, Weisenbach SL, Walker SJ, Guidotti-Breting LM, Rao JA, Hazlett KE, Considine CM, Sethi G, Vats N, Pecina M, Welsh RC, Starkman MN, Giordani B, Langenecker SA. A new semantic list learning task to probe functioning of the Papez circuit. J Clin Exp Neuropsychol. 2015;37(8):816-833.
  • Schallmo M-P, Sponheim SR, Olman CA. Abnormal contextual modulation of visual contour detection in patients with schizophrenia. PLoS One. 2013 Jun 18;8(6):e68090.

Current Students:

Samantha Montoya (Graduate Program in Neuroscience)

Picture of Michael-Paul Schallmo