Abstract:
:The question of how spatially organized activity in the visual cortex behaves during eyes-closed, lysergic acid diethylamide (LSD)-induced "psychedelic imagery" (e.g., visions of geometric patterns and more complex phenomena) has never been empirically addressed, although it has been proposed that under psychedelics, with eyes-closed, the brain may function "as if" there is visual input when there is none. In this work, resting-state functional connectivity (RSFC) data was analyzed from 10 healthy subjects under the influence of LSD and, separately, placebo. It was suspected that eyes-closed psychedelic imagery might involve transient local retinotopic activation, of the sort typically associated with visual stimulation. To test this, it was hypothesized that, under LSD, patches of the visual cortex with congruent retinotopic representations would show greater RSFC than incongruent patches. Using a retinotopic localizer performed during a nondrug baseline condition, nonadjacent patches of V1 and V3 that represent the vertical or the horizontal meridians of the visual field were identified. Subsequently, RSFC between V1 and V3 was measured with respect to these a priori identified patches. Consistent with our prior hypothesis, the difference between RSFC of patches with congruent retinotopic specificity (horizontal-horizontal and vertical-vertical) and those with incongruent specificity (horizontal-vertical and vertical-horizontal) increased significantly under LSD relative to placebo, suggesting that activity within the visual cortex becomes more dependent on its intrinsic retinotopic organization in the drug condition. This result may indicate that under LSD, with eyes-closed, the early visual system behaves as if it were seeing spatially localized visual inputs. Hum Brain Mapp 37:3031-3040, 2016. © 2016 Wiley Periodicals, Inc.
journal_name
Hum Brain Mappjournal_title
Human brain mappingauthors
Roseman L,Sereno MI,Leech R,Kaelen M,Orban C,McGonigle J,Feilding A,Nutt DJ,Carhart-Harris RLdoi
10.1002/hbm.23224subject
Has Abstractpub_date
2016-08-01 00:00:00pages
3031-40issue
8eissn
1065-9471issn
1097-0193journal_volume
37pub_type
临床试验,杂志文章abstract::Task-based functional neuroimaging methods are increasingly being used to identify biomarkers of treatment response in psychiatric disorders. To facilitate meaningful interpretation of neural correlates of tasks and their potential changes with treatment over time, understanding the reliability of the blood-oxygen-lev...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.24883
更新日期:2020-04-15 00:00:00
abstract::Own body perception, and differentiating and comparing one's body to another person's body, are common cognitive functions that have relevance for self-identity and social interactions. In several psychiatric conditions, including anorexia nervosa, body dysmorphic disorder, gender dysphoria, and autism spectrum disord...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.24388
更新日期:2019-02-01 00:00:00
abstract::Non-manifesting carriers (NMC) of the G2019S mutation in the LRRK2 gene represent an "at risk" group for future development of Parkinson's disease (PD) and have demonstrated task related fMRI changes. However, resting-state networks have received less research focus, thus this study aimed to assess the integrity of th...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.24543
更新日期:2019-06-01 00:00:00
abstract::The Disrupted in Schizophrenia Gene 1 (DISC1) plays a role in both neural signaling and development and is associated with schizophrenia, although its links to altered brain structure and function in this disorder are not fully established. Here we have used structural and functional MRI to investigate links with six ...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22560
更新日期:2014-11-01 00:00:00
abstract::Gait disturbances, including freezing of gait, are frequent and disabling symptoms of Parkinson's disease. They often respond poorly to dopaminergic treatments. Although recent studies have shed some light on their neural correlates, their modulation by dopaminergic treatment remains quite unknown. Specifically, the i...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22679
更新日期:2015-03-01 00:00:00
abstract::Electrophysiological signals recorded intracranially show rich frequency content spanning from near-DC to hundreds of hertz. Noninvasive electromagnetic signals measured with electroencephalography (EEG) or magnetoencephalography (MEG) typically contain less signal power in high frequencies than invasive recordings. P...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.24795
更新日期:2020-01-01 00:00:00
abstract::Medial temporal lobe (MTL) subregions play integral roles in memory function and are differentially affected in various neurological and psychiatric disorders. The ability to structurally and functionally characterize these subregions may be important to understanding MTL physiology and diagnosing diseases involving t...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.23887
更新日期:2018-02-01 00:00:00
abstract::The use of functional magnetic resonance imaging (fMRI) to explore central auditory function may be compromised by the intense bursts of stray acoustic noise produced by the scanner whenever the magnetic resonance signal is read out. We present results evaluating the use of one method to reduce the effect of the scann...
journal_title:Human brain mapping
pub_type: 临床试验,杂志文章
doi:10.1002/(sici)1097-0193(1999)7:3<213::aid-hbm5>3.0
更新日期:1999-01-01 00:00:00
abstract::In BOLD fMRI data analysis, robust and accurate estimation of the Hemodynamic Response Function (HRF) is still under investigation. Parametric methods assume the shape of the HRF to be known and constant throughout the brain, whereas non-parametric methods mostly rely on artificially increasing the signal-to-noise rat...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.10100
更新日期:2003-05-01 00:00:00
abstract::It is well established that human behaviors are susceptible to others' opinions. However, optimal decision theory mandates choices be made upon the estimated validities of different information sources and little is known about whether and how people could wean themselves off social conformity bias, especially when th...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.24536
更新日期:2019-06-01 00:00:00
abstract::This study constructs a rat brain T2 -weighted magnetic resonance imaging template including olfactory bulb and a compatible digital atlas. The atlas contains 624 carefully delineated brain structures based on the newest (2005) edition of rat brain atlas by Paxinos and Watson. An automated procedure, as an SPM toolbox...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.21511
更新日期:2013-06-01 00:00:00
abstract::Neuropsychiatric syndromes are highly prevalent in Alzheimer's disease (AD), but their neurobiology is not completely understood. New methods in functional magnetic resonance imaging, such as intrinsic functional connectivity or "resting-state" analysis, may help to clarify this issue. Using such approaches, alteratio...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22248
更新日期:2014-04-01 00:00:00
abstract::Current knowledge about small-world networks underlying emotions is sparse, and confined to functional magnetic resonance imaging (fMRI) studies using resting-state paradigms. This fMRI study applied Eigenvector Centrality Mapping (ECM) and functional connectivity analysis to reveal neural small-world networks underly...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22416
更新日期:2014-07-01 00:00:00
abstract::Early and accurate mild cognitive impairment (MCI) detection within a heterogeneous, nonclinical population is needed to improve care for persons at risk of developing dementia. Magnetic resonance imaging (MRI)-based classification may aid early diagnosis of MCI, but has only been applied within clinical cohorts. We a...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.24554
更新日期:2019-06-15 00:00:00
abstract::No study has investigated red nucleus (RN) atrophy in multiple sclerosis (MS) despite cerebellum and its connections are elective sites of MS-related pathology. In this study, we explore RN atrophy in early MS phases and its association with cerebellar damage (focal lesions and atrophy) and physical disability. Thirty...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.25213
更新日期:2021-01-01 00:00:00
abstract::Our objective was to develop a diffusion tensor MR imaging pulse sequence that allows whole brain coverage with isotropic resolution within a clinically acceptable time. A single-shot, cardiac-gated MR pulse sequence, optimized for measuring the diffusion tensor in human brain, was developed to provide whole-brain cov...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.10018
更新日期:2002-04-01 00:00:00
abstract::Recent theories of selective attention assume that the more attention is required by a task, the earlier are irrelevant stimuli filtered during perceptual processing. Previous functional MRI studies have demonstrated that primary visual cortex (V1) activation by peripheral distractors is reduced by higher task difficu...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.20636
更新日期:2009-05-01 00:00:00
abstract::We present a method for registering a brain in the Talairach coordinate system that can be performed either "online," i.e., in real time while a subject is in a magnetic resonance scanner, or "offline" on a previously acquired three-dimensional (3D) data set. The method is applicable to functional magnetic resonance i...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/(SICI)1097-0193(1997)5:1<58::AID-HBM6>3.0.
更新日期:1997-01-01 00:00:00
abstract::Recognizing the identity of other individuals across different sensory modalities is critical for successful social interaction. In the human brain, face- and voice-sensitive areas are separate, but structurally connected. What kind of information is exchanged between these specialized areas during cross-modal recogni...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.22631
更新日期:2015-01-01 00:00:00
abstract::Non-quantitative MRI is prone to intersubject intensity variation rendering signal intensity level based analyses limited. Here, we propose a method that fuses non-quantitative routine T1-weighted (T1w), T2w, and T2w fluid-saturated inversion recovery sequences using independent component analysis and validate it on a...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.23615
更新日期:2017-07-01 00:00:00
abstract::The registration of image volumes derived from different imaging modalities such as MRI, PET, SPECT, and CT has been described in numerous studies in which functional and morphological data are combined on the basis of macrostructural information. However, the exact topography of architectural details is defined by mi...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:
更新日期:1998-01-01 00:00:00
abstract::Humans make various kinds of decisions about which emotions they perceive from others. Although it might seem like a split-second phenomenon, deliberating over which emotions we perceive unfolds across several stages of decisional processing. Neurocognitive models of general perception postulate that our brain first e...
journal_title:Human brain mapping
pub_type: 杂志文章,评审
doi:10.1002/hbm.24893
更新日期:2020-04-15 00:00:00
abstract:BACKGROUND:Trait impulsiveness is a potential factor that predicts both substance use and certain psychiatric disorders. This study investigates whether there are common structural cerebral correlates of trait impulsiveness and cognitive functioning in a large sample of healthy adolescents from the IMAGEN project. MET...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.21446
更新日期:2013-02-01 00:00:00
abstract:BACKGROUND:While acceleration in age-related cerebral atrophy has been well documented in Alzheimer's disease, the cerebellar contributions to this effect have not been thoroughly investigated. OBJECTIVE:This study investigated cerebellar volume and atrophy rate using magnetic resonance imaging in individuals with nor...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.23580
更新日期:2017-06-01 00:00:00
abstract::It has recently been demonstrated that specific patterns of correlation exist in diffusion tensor imaging (DTI) parameters across white matter tracts in the normal human brain. These microstructural correlations are thought to reflect phylogenetic and functional similarities between different axonal fiber pathways. Ho...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.21292
更新日期:2012-06-01 00:00:00
abstract::We describe a method for the statistical parametric mapping of low resolution electromagnetic tomography (LORETA) using high-density electroencephalography (EEG) and individual magnetic resonance images (MRI) to investigate the characteristics of the mismatch negativity (MMN) generators in schizophrenia. LORETA, using...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.10059
更新日期:2002-11-01 00:00:00
abstract::Past research has found that neural activity associated with feedback processing is enhanced by positive approach-motivated states. However, no past work has examined how reward processing changes in the context of revenge. Using a novel aggression paradigm, we sought to explore the influence of approach-motivated ang...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.25177
更新日期:2020-12-01 00:00:00
abstract::The new clinically available arterial spin labeling (ASL) perfusion imaging sequences present some advantages relatively to the commonly used blood oxygen level-dependent (BOLD) method for functional brain studies using magnetic resonance imaging (MRI). In particular, regional cerebral blood flow (CBF) changes are tho...
journal_title:Human brain mapping
pub_type: 临床试验,杂志文章
doi:10.1002/hbm.21418
更新日期:2013-01-01 00:00:00
abstract::We investigated neural substrates of global/local processing of bilateral hierarchical stimuli using functional magnetic resonance imaging (fMRI). Subjects were presented with two compound letters that were displayed simultaneously in the left and right visual fields, respectively. In a steady-state, block-design para...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.20044
更新日期:2004-08-01 00:00:00
abstract::Recent studies have shown that resting-state functional networks as studied with fMRI, EEG, and MEG may be so-called small-world networks. We investigated to what extent the characteristic features of small-world networks are genetically determined. To represent functional connectivity between brain areas, we measured...
journal_title:Human brain mapping
pub_type: 杂志文章
doi:10.1002/hbm.20468
更新日期:2008-12-01 00:00:00