Schizophrenia (Sz) is associated with deficits in cognitive function that represent a core feature of the disorder. Traditional dopaminergic models stress dysfunction within higher order associational brain regions. In contrast, more recent glutamatergic models predict widespread dysfunction across cortical regions, including primary and secondary sensory cortices. Over the past project period, we have documented deficits in early auditory and visual processing in Sz using behavioral-, event-related potential (ERP) and MRI-based approaches, supporting distributed models of cortical dysfunction in Sz. In addition, we have demonstrated significant contributions of early sensory processing deficits to higher order cortical impairments. These studies have permitted us to formulate specific hypotheses concerning neural mechanisms underlying sensory/cognitive dysfunction in Sz, as well as novel approaches to potential treatment development. In the auditory system, early deficits include impaired ability to match tones following brief delay, as well as impaired generation of mismatch negativity (MMN), auditory N1 and auditory steady-state (ASSR) responses. Furthermore, deficits in low level auditory processing contribute to higher order dysfunction, such as impaired ability to interpret prosody, leading to deficits in auditory emotion recognition (AER), which, in turn, contributes to impaired social function. In the visual system, deficits include reduced contrast sensitivity particularly to low contrast, low spatial frequency (LSF) stimuli that preferentially engage the magnocellular visual system, as well as impaired generation of steady state visual evoked potentials (ssVEP), visual P1, and impaired fMRI activation of magnocellular-recipient regions of primary visual cortex. Low level deficits contribute to higher order impairments including in perceptual closure and face emotion recognition (FER). Both auditory and visual deficits contribute to progressive impairment in reading ability, which may be an early marker of Sz. Finally, both auditory and visual deficits correlate with impaired structura and functional connectivity within low level sensory regions, as assessed using diffusion tensor (DTI) and resting state (rsfMRI) imaging. To date, neurophysiological abnormalities have been assessed mainly using time-domain approaches. Over the upcoming period, we will incorporate advanced frequency-domain and oscillatory hierarchical approaches as well, which provide separate indices of spontaneous and event-related dynamics of neuronal oscillations. Visual ERP will be combined with eye tracking to permit evaluation of naturalistic scene processing. We will also explore patterns of dysfunction within both prodromal and first episode (FE) cohorts using paradigms validated during our prior grant cycle. Finally, we will incorporate novel brain stimulation approaches including Transcranial Magnetic Stimulation (rTMS) applied over sensory vs. frontal cortical regions to disrupt local processing in healthy controls as a model for Sz;and transcranial Direct Current Stimulation (tDCS) applied over sensory or frontal brain regions as a prelude to plasticity-based stimulatory intervention in Sz.

Public Health Relevance

Schizophrenia is a major neuropsychiatric disorder and leading cause of disability worldwide. Cognitive deficits are a core feature of schizophrenia and a major contributor to illness-related disability. This project examines sensory contributions to cognitive impairments in schizophrenia. Over previous grant cycles, we have demonstrated that individuals with schizophrenia show severe impairments in basic auditory and visual processes, such as the ability to match tones following brief delay, or to see pictures presented at low contrast. These deficits make it difficult for patients to interpret emotion based on tone of voice or facial expression, and contribute to severe reading dysfunction in a subset of patients. Studies during the next grant period will investigate the causes of sensory dysfunction using EEG (brain wave) based approaches as well as functional magnetic resonance imaging. In addition, we will evaluate other ways by which sensory deficits might lead to impaired function. Finally, we will evaluate the use of newly developed brain stimulation approaches to determine the degree to which they might be beneficial in reversing sensory-level abnormalities. If this approach is successful, it may open the way for novel, brain stimulation-based approaches in schizophrenia.

National Institute of Health (NIH)
National Institute of Mental Health (NIMH)
Research Project (R01)
Project #
Application #
Study Section
Neural Basis of Psychopathology, Addictions and Sleep Disorders Study Section (NPAS)
Program Officer
Meinecke, Douglas L
Project Start
Project End
Budget Start
Budget End
Support Year
Fiscal Year
Total Cost
Indirect Cost
Nathan Kline Institute for Psychiatric Research
United States
Zip Code
Javitt, Daniel C (2014) Distress intolerance, kynurenic acid, and schizophrenia. JAMA Psychiatry 71:749-50
Brunoni, Andre R; Shiozawa, Pedro; Truong, Dennis et al. (2014) Understanding tDCS effects in schizophrenia: a systematic review of clinical data and an integrated computation modeling analysis. Expert Rev Med Devices 11:383-94
Revheim, Nadine; Corcoran, Cheryl M; Dias, Elisa et al. (2014) Reading deficits in schizophrenia and individuals at high clinical risk: relationship to sensory function, course of illness, and psychosocial outcome. Am J Psychiatry 171:949-59
Hoptman, Matthew J; Antonius, Daniel; Mauro, Cristina J et al. (2014) Cortical thinning, functional connectivity, and mood-related impulsivity in schizophrenia: relationship to aggressive attitudes and behavior. Am J Psychiatry 171:939-48
Spering, Miriam; Dias, Elisa C; Sanchez, Jamie L et al. (2013) Efference copy failure during smooth pursuit eye movements in schizophrenia. J Neurosci 33:11779-87
Leitman, David I; Sehatpour, Pejman; Higgins, Beth A et al. (2010) Sensory deficits and distributed hierarchical dysfunction in schizophrenia. Am J Psychiatry 167:818-27
Leitman, David I; Laukka, Petri; Juslin, Patrik N et al. (2010) Getting the cue: sensory contributions to auditory emotion recognition impairments in schizophrenia. Schizophr Bull 36:545-56
Kantrowitz, Joshua T; Revheim, Nadine; Pasternak, Roey et al. (2009) It's all in the cards: effect of stimulus manipulation on Wisconsin Card Sorting Test performance in schizophrenia. Psychiatry Res 168:198-204
Javitt, Daniel C (2009) Glycine transport inhibitors for the treatment of schizophrenia: symptom and disease modification. Curr Opin Drug Discov Devel 12:468-78
Javitt, Daniel C; Spencer, Kevin M; Thaker, Gunvant K et al. (2008) Neurophysiological biomarkers for drug development in schizophrenia. Nat Rev Drug Discov 7:68-83

Showing the most recent 10 out of 25 publications