Silvina G Horovitz
Affiliation: National Institutes of Health
- Low frequency BOLD fluctuations during resting wakefulness and light sleep: a simultaneous EEG-fMRI studySilvina G Horovitz
Advanced MRI Section, LFMI, NINDS, National Institutes of Health, Bethesda, Maryland, USA
Hum Brain Mapp 29:671-82. 2008..These results suggest that activity in areas such as the default-mode network and primary sensory cortex, as measured from BOLD fMRI fluctuations, does not require a level of consciousness typical of wakefulness...
- Simultaneous recording of event-related auditory oddball response using transcranial near infrared optical topography and surface EEGRichard P Kennan
Department of Medicine, Albert Einstein College of Medicine, USA
Neuroimage 16:587-92. 2002..This is the first demonstration of simultaneous ERP electrical recording and non-invasive optical mapping in human subjects, which promises to be an important tool in the characterization of both normal and abnormal brain function...
- Parametric design and correlational analyses help integrating fMRI and electrophysiological data during face processingSilvina G Horovitz
Institute of Imaging Science, Vanderbilt University, Nashville, TN 37203, USA
Neuroimage 22:1587-95. 2004..Parametric designs may be developed further to provide some timing information on fMRI activity and help identify the generators of ERP signals...
- Low-frequency fluctuations in the cardiac rate as a source of variance in the resting-state fMRI BOLD signalKarin Shmueli
Advanced MRI Section, Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke, National Institutes of Health, 10 Center Drive, Bldg 10, Rm B1D 728, Bethesda, MD 20892 1065, USA
Neuroimage 38:306-20. 2007..This suggests that including such time-shifted cardiac rate regressors will be beneficial for explaining physiological noise variance and will thereby improve the statistical power in future task-based and resting-state fMRI studies...
- Functional anatomy of writing with the dominant handSilvina G Horovitz
Human Motor Control Section, Medical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland, United States of America
PLoS ONE 8:e67931. 2013....
- Anatomical correlates of blepharospasmSilvina G Horovitz
Human Motor Control Section, Medical Neurology Branch, National Institute of Neurological Disorders and Stroke, 10 Center Drive, Bdg10 7D37, Bethesda, MD, USA
Transl Neurodegener 1:12. 2012..abstract:..
- Decoupling of the brain's default mode network during deep sleepSilvina G Horovitz
Human Motor Control Section, Medical Neurology Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
Proc Natl Acad Sci U S A 106:11376-81. 2009..This suggests that DMN may play an important role in the sustenance of conscious awareness...
- Metabolic origin of BOLD signal fluctuations in the absence of stimuliMasaki Fukunaga
Advanced MRI, LFMI, NINDS, National Institutes of Health, Bethesda, Maryland 20892 1065, USA
J Cereb Blood Flow Metab 28:1377-87. 2008..79+/-0.54 and 1.66+/-0.67, respectively), but both were lower than the BPR during BH. These data suggest that resting-state activity, at least in part, represents a metabolic process...
- Rhythmic alternating patterns of brain activity distinguish rapid eye movement sleep from other states of consciousnessHo Ming Chow
Language Section, Voice, Speech, and Language Branch, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD 20892, USA
Proc Natl Acad Sci U S A 110:10300-5. 2013..1 to 0.01 Hz. This unique spatiotemporal pattern suggests a model for REM sleep that may be consistent with its role in dream formation and memory consolidation...
- Sources of functional magnetic resonance imaging signal fluctuations in the human brain at rest: a 7 T studyMarta Bianciardi
Advanced MRI Section, LFMI, NINDS, National Institutes of Health, Bethesda, MD 20892 1065, USA
Magn Reson Imaging 27:1019-29. 2009..Under the conditions of this study, spontaneous neuronal activity is one of the major contributors to the measured fMRI signal fluctuations, increasing almost twofold relative to earlier experiments under similar conditions at 3 T...
- Modulation of spontaneous fMRI activity in human visual cortex by behavioral stateMarta Bianciardi
Advanced MRI Section, Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892 1065, USA
Neuroimage 45:160-8. 2009....
- Large-amplitude, spatially correlated fluctuations in BOLD fMRI signals during extended rest and early sleep stagesMasaki Fukunaga
Advanced MRI, LFMI, NINDS, National Institutes of Health, Bethesda, MD 20892 1065, USA
Magn Reson Imaging 24:979-92. 2006..These findings suggest that resting-state activity continues during sleep and does not require active cognitive processes or conscious awareness...
- Individuated finger control in focal hand dystonia: an fMRI studyRyan D Moore
Human Motor Control Section, Medical Neurology Branch, National Institute of Neurological Disorders and Stroke, NIH, Building 10, Room 7D37, 10 Center Drive, MSC 1428, Bethesda, MD 20892 1428, USA
Neuroimage 61:823-31. 2012..To better understand deficient selective motor control in focal hand dystonia by determining changes in striatal activation and connectivity in patients performing individuated finger control...
- In vivo neurochemistry of primary focal hand dystonia: a magnetic resonance spectroscopic neurometabolite profiling study at 3TPriyantha Herath
Medical Neurology Branch, Human Motor Control Section, NINDS NIH, Bethesda, Maryland, USA
Mov Disord 25:2800-8. 2010..Twenty-two patients with focal hand dystonia and 22 healthy controls were studied. No significant differences in GABA were observed between the groups in either the sensorimotor cortex or in the basal ganglia...
- Sleep and the functional connectomeDante Picchioni
Department of Behavioral Biology, Walter Reed Army Institute of Research, Silver Spring, MD, USA
Neuroimage 80:387-96. 2013..In this review, we will discuss examples of this for memory, arousal, and consciousness after providing a brief background on sleep and on studying it with fMRI. ..
- Real time BOLD functional MRI neuro-feedback affects functional connectivitySilvina G Horovitz
National Institute of Neurological Disorders and Stroke, Bethesda, MD 20892, USA
Conf Proc IEEE Eng Med Biol Soc 2010:4270-3. 2010..The presence of the neuro-feedback not only induces correlations between the visual and motor areas, but also increases basal ganglia involvement and bilateral motor cortex connectivity...
- fMRI differences between early and late stage-1 sleepDante Picchioni
Division of Psychiatry and Neuroscience, Walter Reed Army Institute of Research, Silver Spring, MD 20910, USA
Neurosci Lett 441:81-5. 2008..These differences may also have specific relevance to understanding the process of sleep onset as well as the neural mechanisms of performance lapses during sleep deprivation...
- Simultaneous event-related potential and near-infrared spectroscopic studies of semantic processingSilvina G Horovitz
Engineering and Applied Science, Yale University, New Haven, Connecticut, USA
Hum Brain Mapp 22:110-5. 2004..This, together with the feasibility of simultaneous ERP recording, makes NIROT attractive as a new approach to studying language function in healthy subjects as well as in those with functional abnormalities...