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Negative valence in Obsessive-Compulsive Disorder: A worldwide mega-analysis of task-based functional neuroimaging data of the ENIGMA-OCD consortium.
Biol Psychiatry
December 2024
Amsterdam UMC, Department of Anatomy & Neurosciences, Amsterdam Neuroscience, Amsterdam, The Netherlands; Amsterdam UMC, Department of Psychiatry, Amsterdam Neuroscience, Amsterdam, The Netherlands; Amsterdam UMC, Amsterdam Neuroscience, Amsterdam, The Netherlands; Amsterdam UMC, Compulsivity, Impulsivity and Attention, Amsterdam, The Netherlands.
Objective: Obsessive-compulsive disorder (OCD) is associated with altered brain function related to processing of negative emotions. To investigate neural correlates of negative valence in OCD, we pooled fMRI data of 633 individuals with OCD and 453 healthy controls from 16 studies using different negatively-valenced tasks across the ENIGMA-OCD Working-Group.
Methods: Participant data were processed uniformly using HALFpipe, to extract voxelwise participant-level statistical images of one common first-level contrast: negative vs.
Amygdala-centered emotional processing in Prolonged Grief Disorder: Relationship with clinical symptomatology.
Biol Psychiatry Cogn Neurosci Neuroimaging
December 2024
Department of Psychiatry and Behavioral Medicine, Medical College of Wisconsin, Milwaukee, WI, USA. Electronic address:
Background: Prolonged Grief Disorder is a multidimensional condition with adverse health consequences. We hypothesized that enhanced negative emotional bias characterizes this disorder and underlies its key clinical symptoms.
Methods: In a cross-sectional design, chronically grieving older adults (61.
Unraveling EEG correlates of unimanual finger movements: insights from non-repetitive flexion and extension tasks.
J Neuroeng Rehabil
December 2024
Laboratory for Neuro- & Psychophysiology, Department of Neurosciences, KU Leuven, Leuven, Belgium.
Background: The loss of finger control in individuals with neuromuscular disorders significantly impacts their quality of life. Electroencephalography (EEG)-based brain-computer interfaces that actuate neuroprostheses directly via decoded motor intentions can help restore lost finger mobility. However, the extent to which finger movements exhibit distinct and decodable EEG correlates remains unresolved.
View Article and Find Full Text PDFThe role of deep layer superior colliculus neurons in prepulse inhibition and the impact of spatial separation in male rats.
Neuroscience
December 2024
School of Psychological and Cognitive Sciences, Peking University, Beijing 100080, China.
Prepulse inhibition (PPI) refers to the phenomenon in which a weak sensory stimulus before a strong one significantly reduces the startle reflex caused by the strong stimulus. Perceptual spatial separation, a phenomenon where auditory cues from the prepulse and background noise are distinguished in space, has been shown to enhance PPI. This study aims to investigate the neural modulation mechanisms of PPI by the spatial separation between the prepulse stimulus and background noise, particularly in the deep superior colliculus (deepSC).
View Article and Find Full Text PDFAperiodic neural activity distinguishes between phasic and tonic REM sleep.
J Sleep Res
December 2024
Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behavior, Nijmegen, Netherlands.
Traditionally categorized as a uniform sleep phase, rapid eye movement sleep exhibits substantial heterogeneity with its phasic and tonic constituents showing marked differences regarding many characteristics. Here, we investigate how tonic and phasic states differ with respect to aperiodic neural activity, a marker of arousal and sleep. Rapid eye movement sleep heterogeneity was assessed using either binary phasic-tonic (n = 97) or continuous (in 60/97 participants) approach.
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