Publications by authors named "Stephan T Palm"

Small single-site studies found that transcranial magnetic stimulation (TMS) targets with better antidepressant response were more negatively functionally connected to the subgenual cingulate cortex (SGC). These led to "anti-subgenual" TMS targeting in recent clinical trials. We conducted a larger prospective multi-site observational study to test the robustness of this observation in more diverse clinical populations.

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Importance: Identifying anatomy causally involved in psychosis could inform therapeutic neuromodulation targets for schizophrenia.

Objective: To assess whether lesions that cause secondary psychosis have functional connections to a common brain circuit.

Design, Setting, And Participants: This case-control study mapped functional connections of published cases of lesions causing secondary psychosis compared with control lesions unassociated with psychosis.

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Article Synopsis
  • * Analysis of three datasets revealed a 'PTSD circuit' involving the medial prefrontal cortex, amygdala, and anterolateral temporal lobe, especially in veterans with traumatic brain injuries.
  • * Functional connectivity within this circuit was linked to PTSD symptoms and decreased after transcranial magnetic stimulation, suggesting it could be a key focus for future treatment trials.
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Objective: Anxiety disorders and subsyndromal anxiety symptoms are highly prevalent in late life. Recent studies support that anxiety may be a neuropsychiatric symptom during preclinical Alzheimer's disease (AD) and that higher anxiety is associated with more rapid cognitive decline and progression to cognitive impairment. However, the associations of specific anxiety symptoms with AD pathologies and with co-occurring subjective and objective cognitive changes have not yet been established.

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Objective: Convergent data point to an exaggerated negativity bias in bipolar disorder (BD), and little is known about whether people with BD experience the 'positivity effect' with increasing age.

Method: This is a cross sectional study of 202 participants with BD aged 18-65, and a sample (n = 53) of healthy controls (HCs). Participants completed the CANTAB Emotion Recognition Task (ERT).

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