Neuromodulation Strategies for Treatment-Resistant Schizophrenia

Treatment-resistant schizophrenia (TRS) affects a substantial minority of patients who fail to respond adequately to conventional antipsychotic therapies. Neuromodulation offers a suite of invasive and non-invasive techniques designed to restore circuit function by directly altering neuronal activity in key brain networks. Invasive approaches centre on deep brain stimulation (DBS), in which electrodes deliver electrical pulses to targets such as the nucleus accumbens, subgenual anterior cingulate cortex and ventral tegmental area. Emerging preclinical models have demonstrated that frequency-specific stimulation of the medial septal nucleus can enhance hippocampal blood flow and support cognitive processing, while modulation of ventral tegmental circuits may alleviate positive psychotic symptoms via GABAergic mechanisms. Non-invasive methods—including repetitive transcranial magnetic stimulation (rTMS) and transcranial direct current stimulation (tDCS)—have been applied to the dorsolateral prefrontal cortex and other cortical sites to improve negative symptoms and cognitive deficits. Neuroablation techniques, such as subcaudate tractotomy and anterior capsulotomy, have also shown long-term benefit in selected cohorts. Across these modalities, progress hinges on refining target selection, optimising stimulation parameters and ensuring long-term safety. Growing international efforts and technological advances point towards personalised neuromodulation protocols, offering new therapeutic hope for individuals with otherwise intractable illness and reducing the global burden of schizophrenia.

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Neuromodulation Strategies for Treatment-Resistant Schizophrenia publication trend

The graph below shows the total number of articles in neuromodulation strategies for treatment-resistant schizophrenia across all publications each year (not limited to Nature Index journals).

Technical terms

Deep brain stimulation (DBS): A neurosurgical procedure in which implanted electrodes deliver electrical pulses to specific brain regions to modulate abnormal neural activity.

Repetitive transcranial magnetic stimulation (rTMS): A non-invasive technique using magnetic fields to induce electrical currents in targeted cortical areas, altering neuronal excitability.

Transcranial direct current stimulation (tDCS): A non-invasive method applying weak electrical currents via scalp electrodes to modulate cortical excitability and network connectivity.

Treatment-resistant schizophrenia (TRS): A form of schizophrenia defined by inadequate response to at least two antipsychotic trials of adequate dose and duration.

Neuroablation: A neurosurgical approach that deliberately lesions specific white-matter tracts or grey-matter regions to disrupt pathological circuits.

Ventral tegmental area (VTA): A midbrain structure containing dopaminergic and GABAergic neurons involved in reward, affective regulation and psychotic symptomatology.

References

1. Theta-frequency medial septal nucleus deep brain stimulation increases neurovascular activity in MK-801-treated mice. Frontiers in Neuroscience (2024).
2. Schizophrenia and neurosurgery: systematic review and theories.. Neurosurgical FOCUS (2023).
3. A preclinical study of deep brain stimulation in the ventral tegmental area for alleviating positive psychotic-like behaviors in mice. Frontiers in Human Neuroscience (2022).