Right temporal activation differs between melancholia and nonmelancholic depression: A multichannel near-infrared spectroscopy study

Tsujii, Noa; Mikawa, Wakako; Akashi, Hiroyuki; Tsujimoto, Emi; Adachi, Toru; Kirime, Eiji; Takaya, Masahiko; Yanagi, Masaya; Sato, Osamu

doi:10.1016/j.jpsychires.2014.04.003

Cited by 51 publications

(24 citation statements)

References 48 publications

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“…Some study demonstrated positive correlations between depression severity and the PFC cortical activity38, while others did not show significant associations3940. In our study, depression severity was negatively associated with cortical activity of the PFC, which was consistent with findings reported by Sato and his colleagues20.…”

Section: Discussionsupporting

confidence: 92%

Perceived Occupational Stress is associated with Decreased Cortical Activity of the Prefrontal Cortex: A Multichannel Near-infrared Spectroscopy Study

Chou

Lin

Hung

et al. 2016

Sci Rep

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Despite an increasing number of reports on the associations between chronic occupational stress and structural and functional changes of the brain, the underlying neural correlates of perceived occupational stress is still not clear. Perceived stress reflects the extents to which situations are appraised as stressful at a given point in one’s life. Using near-infrared spectroscopy, we investigated the associations between perceived occupational stress and cortical activity over the bilateral frontotemporal regions during a verbal fluency test. Sixty-eight participants (17 men, 51 women), 20–62 years of age were recruited. Perceived occupational stress was measured using the Chinese version of Job Content Questionnaire, and the Chinese version of the Copenhagen Burnout Inventory. We found statistically significant negative associations between occupational burnout and brain cortical activity over the fronto-polar and dorsolateral prefrontal cortex during the VFT (r = −0.343 to −0.464). In conclusion, our research demonstrated a possible neural basis of perceived occupational stress that are distributed across the prefrontal cortex.

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Section: Discussionsupporting

confidence: 92%

Perceived Occupational Stress is associated with Decreased Cortical Activity of the Prefrontal Cortex: A Multichannel Near-infrared Spectroscopy Study

Chou

Lin

Hung

et al. 2016

Sci Rep

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“…There is less extensive literature on using WM tasks with fNIRS, but, again, bilateral activation has been found. 92,113 Consistent with extensive literature, [94][95][96][97][98][99][100][101][102][103][104][105][106][107][108][109][112][113][114] we found significantly decreased, and possibly delayed, prefrontal haemodynamic responses in depressed patients in the VF task and, less certainly, in the n-back task. For the VF task we found a significant negative correlation between MADRS score and the haemodynamic response in the LVF cortex in patients.…”

Section: Near-infrared Spectroscopy Studysupporting

confidence: 91%

“…NIHR Journals Library www.journalslibrary.nihr.ac.uk reliably demonstrate decreased lateral prefrontal cortex-anterior temporal cortex haemodynamic responses compared with control subjects during a VF task, [94][95][96][97][98][99][100][101][102][103][104][105][106] including in bipolar depression. [107][108][109] There is some uncertainty over whether this is a state or trait abnormality, as some studies have found restored activation to a VF task following treatment 110 and increased activation has been seen in hypomanic patients, 108 whereas blunted responses have been found in remitted depressed patients 111 and euthymic bipolar patients 109 or failure to normalise after antidepressant treatment in depressed patients.…”

Section: Background and Objectivesmentioning

confidence: 91%

Randomised controlled trial of ketamine augmentation of electroconvulsive therapy to improve neuropsychological and clinical outcomes in depression (Ketamine-ECT study)

et al. 2017

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BackgroundElectroconvulsive therapy (ECT) is the most effective acute treatment for severe depression, but there are concerns about its adverse cognitive effects. ECT may impair cognition through stimulation of glutamate receptors, and preliminary evidence has suggested that ketamine, a glutamate antagonist, may alleviate these effects. Ketamine has been shown to have a rapid, but temporary, antidepressant effect after a single infusion.ObjectiveTo determine the efficacy and safety of adjunctive low-dose ketamine to reduce cognitive impairments caused by ECT and, secondarily, to improve symptomatic outcome.DesignMulticentre, two-arm, parallel-group, patient-randomised, placebo-controlled superiority trial.SettingEleven ECT suites based in seven NHS trusts in the north of England.ParticipantsSeverely depressed hospitalised patients or outpatients who received ECT as part of their usual clinical care.InterventionsPatients were randomised to ketamine (0.5 mg/kg) or saline as an adjunct to their anaesthetic for their ECT course in a 1 : 1 ratio.Main outcome measuresThe primary outcome was delayed verbal recall on the Hopkins Verbal Learning Task – Revised (HVLT-R) after four ECT treatments (mid-ECT), analysed using a Gaussian repeated measures model. Secondary outcomes included autobiographical, working and visual memory and verbal fluency, symptoms and quality of life; assessments occurred at mid-ECT, end of treatment and 1 and 4 months after the last ECT. Neuropsychological function was compared with that of healthy control subjects and a functional near-infrared spectroscopy (fNIRS) substudy investigated prefrontal cortex function. A patient survey of study participation was carried out.ResultsSeventy-nine severely depressed patients were randomised to ketamine (0.5 mg/kg) or saline as an adjunct to their anaesthetic for their ECT course; the modified intention-to-treat sample included 70 patients. Compared with saline, adjunctive ketamine had no significant effect on HVLT-R delayed recall [treatment effect difference –0.43, 95% confidence interval (CI) –1.73 to 0.87], other neuropsychological outcomes, improvement in depression [difference in Montgomery–Åsberg Depression Rating Scale (MADRS) score of 0.44, 95% CI –1.03 to 1.91], the number of ECT treatments to remission (MADRS score of ≤ 10: 0.83, 95% CI –3.2 to 4.9), anxiety symptoms or quality of life. By the end of ECT treatment, 37% (saline 35%, ketamine 39%) of patients had remitted. Tolerability was similar in the two treatment arms; two patients had isolated transient psychological effects attributable to ketamine. Preliminary fNIRS analysis found that patients had blunted prefrontal cortical haemodynamic responses compared with control subjects during a verbal fluency task at baseline; this was further diminished at mid-ECT without modulation by ketamine. Greater haemodynamic responsivity to ECT appeared to be associated with a better clinical response. The majority of patients surveyed reported a positive experience of study participation.ConclusionsThe results of the study do not support the use of adjunctive ketamine in routine ECT treatment in the NHS. Although no evidence of benefit was found for ketamine, moderate benefits or harms cannot be excluded, as recruitment was < 50% of that planned, limiting the power of the clinical trial. Low numbers also meant that in the fNIRS substudy the effect of ketamine could not be assessed and the other findings must be viewed as preliminary. Included patients were younger than those not included and had only limited cognitive impairment with ECT, limiting generalisation to more cognitively compromised patients. fNIRS appeared to be a potentially feasible portable brain imaging technology in severely ill patients and further research is warranted to investigate its clinical utility.Trial registrationCurrent Controlled Trials ISRCTN14689382.FundingThis project was funded by the Efficacy and Mechanism Evaluation programme, a Medical Research Council and National Institute for Health Research partnership.

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“…NIRS data analysis was performed according to the manual for clinical psychiatric settings in Japan for NIRS measurements, as shown in previous reports [ 3 – 6 , 23 ]. Briefly, relative changes of oxy-Hb data were analyzed to estimate regional brain activation, and the mean oxy-Hb signals during the task period were analyzed using the “integral mode”: the pre-task baseline level was defined as the mean oxy-Hb measured for 10 s immediately before the task period, the post-task baseline level was defined as the mean oxy-Hb for the last 5 s in the post-task period, and linear fitting was then applied to the data between these pre- and post-task baseline levels [ 3 , 4 , 23 ]. A 5-s moving average was calculated to eliminate any short-term motion artifacts.…”

Section: Methodsmentioning

confidence: 99%

“…A 5-s moving average was calculated to eliminate any short-term motion artifacts. Based on previous NIRS studies, the data acquired from the 21 channels in the upper two rows were excluded from statistical analysis, because they clearly contained artifacts, presumably because of the presence of hair and also because their signal-to-noise ratio seemed to be low or approaching zero [ 5 , 6 , 23 ].…”

Section: Methodsmentioning

confidence: 99%

Repetition of verbal fluency task attenuates the hemodynamic activation in the left prefrontal cortex: Enhancing the clinical usefulness of near-infrared spectroscopy

et al. 2018

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In applications of near-infrared spectroscopy (NIRS) in clinical psychiatry settings in Japan, a phonemic verbal fluency test (VFT) that includes “switching” (the ability to shift efficiently to a new word subcategory) to assess phonemic fluency is employed to capture disease-specific hemodynamic changes in the prefrontal cortex (PFC). In this study, to extend the specific features of this test, the VFT was repeated to examine an activation change in NIRS measurements in 20 healthy males. Without task performance change, the hemodynamic activation induced by the VFT was significantly attenuated in the left PFC through repetition of the task. These findings suggest that the left PFC is involved in processing of the VFT. Further, it may be possible to extend the current VFT using this repetition to provide a more sensitive examination of the left PFC, whose dysfunction has been reported in several psychiatric diseases such as major depression, bipolar disorder, and schizophrenia.

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Right temporal activation differs between melancholia and nonmelancholic depression: A multichannel near-infrared spectroscopy study

Cited by 51 publications

References 48 publications

Perceived Occupational Stress is associated with Decreased Cortical Activity of the Prefrontal Cortex: A Multichannel Near-infrared Spectroscopy Study

Perceived Occupational Stress is associated with Decreased Cortical Activity of the Prefrontal Cortex: A Multichannel Near-infrared Spectroscopy Study

Randomised controlled trial of ketamine augmentation of electroconvulsive therapy to improve neuropsychological and clinical outcomes in depression (Ketamine-ECT study)

Repetition of verbal fluency task attenuates the hemodynamic activation in the left prefrontal cortex: Enhancing the clinical usefulness of near-infrared spectroscopy

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