Modulating Emotional Experience Using Electrical Stimulation of the Medial-Prefrontal Cortex: A Preliminary tDCS-fMRI Study.

OBJECTIVES: Implicit regulation of emotions involves medial-prefrontal cortex (mPFC) regions exerting regulatory control over limbic structures. Diminished regulation relates to aberrant mPFC functionality and psychopathology. Establishing means of modulating mPFC functionality could benefit research on emotion and its dysregulation. Here, we tested the capacity of transcranial direct current stimulation (tDCS) targeting mPFC to modulate subjective emotional states by facilitating implicit emotion regulation. MATERIALS AND METHODS: Stimulation was applied concurrently with functional magnetic resonance imaging to validate its neurobehavioral effect. Sixteen participants were each scanned twice, counterbalancing active and sham tDCS application, while undergoing negative mood induction (clips featuring negative vs. neutral contents). Effects of stimulation on emotional experience were assessed using subjective and neural measures. RESULTS: Subjectively, active stimulation led to significant reduction in reported intensity of experienced emotions to negatively valenced (p = 0.005) clips but not to neutral clips (p > 0.99). Active stimulation further mitigated a rise in stress levels from pre- to post-induction (sham: p = 0.004; active: p = 0.15). Neurally, stimulation increased activation in mPFC regions associated with implicit emotion regulation (ventromedial-prefrontal cortex; subgenual anterior-cingulate cortex, sgACC), and in ventral striatum, a core limbic structure (all ps < 0.05). Stimulation also altered functional connectivity (assessed using whole-brain psycho-physiological interaction) between these regions, and with additional limbic regions. Stimulation-induced sgACC activation correlated with reported emotion intensity and depressive symptoms (rs > 0.64, ps < 0.018), suggesting individual differences in stimulation responsivity. CONCLUSIONS: Results of this study indicate the potential capacity of tDCS to facilitate brain activation in mPFC regions underlying implicit regulation of emotion and accordingly modulate subjective emotional experiences.

The price of internship through COVID-19: 1st year physicians report substantial mental health symptoms during the pandemic.

OBJECTIVES: To examine the prevalence of mental health symptoms among medical interns working for the first time as physicians in a large tertiary hospital in Israel during the 1st COVID year. METHODS: All interns who worked for at least 2 months during the 1st COVID year (March 2020-February 2021) at the Tel-Aviv Sourasky Medical Center (TASMC), a large tertiary general hospital in Israel were approached simultaneously during April-May 2021, and were requested to fill in an online survey. In each questionnaire, the interns were asked to refer to the worst time they endured the symptoms described. Included were all medical. Depression and anxiety symptoms, post-traumatic stress symptoms and Burnout measures were evaluated using validated questionnaires. Depressive/anxiety symptoms were defined as primary end measures. We assessed the association between depression and anxiety symptoms, and demographic, post-traumatic and burnout measures. RESULTS: 145 out of 188 interns completed the study (77% overall response rate). The mean age was 30.36 ± 2.97. Almost half the interns (47%) reported depression/anxiety symptoms. The high depression/anxiety group was characterized by a lower mean age (29.87 ± 2.93 vs. 30.92 ± 2.91, p = 0.041), higher post-traumatic symptoms (15.62 ± 13.32 vs. 3.63 ± 5.59, p < 0.0001) and higher scores in 2/3 burnout subscales - emotional exhaustion (5.09 ± 1.29 vs. 3.61 ± 1.38, p = 0.000001) and depersonalization (3.83 ± 1.71 vs. 2.94 ± 1.46, p = 0.002). 11.4% of interns in the full sample reported they used cannabis or alcohol as "self-medication". CONCLUSIONS: medical interns serving for their first year as physicians during the COVID pandemic, developed mental symptoms in alarming numbers. The findings point to a crucial need to implement active interventions to protect these doctors, so that they can safely embark on their medical careers, specifically in times of global health crises.

The Effects of the 1st National COVID 19 Lockdown on Emergency Psychiatric Visit Trends in a Tertiary General Hospital in Israel.

OBJECTIVE: To examine whether the 1st COVID-19 lockdown in Israel affected emergency psychiatric presentations in a general hospital. METHOD: We studied files of patients who underwent psychiatric consultation in the emergency-room (ER) at the Tel-Aviv Sourasky Medical Center during a lockdown imposed in 2020. Parallel data were obtained from 2017-2019, as control. RESULTS: The number of psychiatric consultations dropped during the lockdown period; an increased relative number of compulsory psychiatric hospitalizations was documented and a decreased rate of consented psychiatric hospitalizations. DISCUSSION: Less psychiatric patients approached the ER during the lockdown period, pointing to an urgent need to facilitate access to psychiatric care in future times of crisis.

Inducing a Functional-Pharmacological Coupling in the Human Brain to Achieve Improved Drug Effect.

Neuropharmacotherapy is substantially hindered by poor drug targeting, resulting in low specificity and efficacy. It is known that different behavioral tasks increase functional activity and cerebral blood flow (CBF), two key parameters controlling drug delivery and efficacy. Here, we tested a novel, non-invasive drug targeting approach (termed functional-pharmacological coupling), which couples drug administration with a task that is known to specifically activate the drug's sites-of-action in the brain. In two studies we administered Methylphenidate (MPH) to neurotypical adults and to subjects with attention deficit hyperactivity disorder (ADHD). In study 1 we employed a within-subject factorial design and found that only following MPH administration, subjects that performed better in the cognitive induction task showed greater improvements in N-back performance. Moreover, only under MPH-Cognitive induction condition, this improvement correlated with concurrent N-Back rDLPFC activation. In Study 2, subjects with ADHD performed better on sustained attention when MPH administration was followed by a cognitive challenge rather than a control task. Again, those who were more attentive to the cognitive challenge scored higher. Our results provide preliminary support for the feasibility of functional-pharmacological coupling concept, hence opening a new horizon for patient-tailored, context-driven drug therapy.