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Linear and Nonlinear Relationships between Neuronal Activity, Oxygen Metabolism, and Hemodynamic Responses
- S. Sheth, M. Nemoto, Michael Guiou, Melissa A Walker, N. Pouratian, A. Toga
- Biology, Medicine
- 22 April 2004
We investigated the relationship between neuronal activity, oxygen metabolism, and hemodynamic responses in rat somatosensory cortex with simultaneous optical intrinsic signal imaging and… Expand
Evaluation of coupling between optical intrinsic signals and neuronal activity in rat somatosensory cortex
- S. Sheth, M. Nemoto, Michael Guiou, M. Walker, N. Pouratian, A. Toga
- Psychology, Medicine
- 1 July 2003
We investigated the coupling between perfusion-related brain imaging signals and evoked neuronal activity using optical imaging of intrinsic signals (OIS) at 570 and 610 nm. OIS at 570 nm reflects… Expand
Columnar Specificity of Microvascular Oxygenation and Volume Responses: Implications for Functional Brain Mapping
Cortical neurons with similar properties are grouped in columnar structures and supplied by matching vascular networks. The hemodynamic response to neuronal activation, however, is not well described… Expand
Functional Signal- and Paradigm-Dependent Linear Relationships between Synaptic Activity and Hemodynamic Responses in Rat Somatosensory Cortex
- M. Nemoto, S. Sheth, Michael Guiou, N. Pouratian, J. Chen, A. Toga
- Biology, Medicine
- The Journal of Neuroscience
- 14 April 2004
Linear relationships between synaptic activity and hemodynamic responses are critically dependent on functional signal etiology and paradigm. To investigate these relationships, we simultaneously… Expand
Gamma Knife radiosurgery to the surgical cavity following resection of brain metastases.
OBJECT This study evaluated the efficacy of postoperative Gamma Knife surgery (GKS) to the tumor cavity following gross-total resection of a brain metastasis. METHODS A retrospective review was… Expand
Incidence of symptomatic hemorrhage after stereotactic electrode placement.
OBJECT Intracranial hemorrhage (ICH) is the most significant complication associated with the placement of stereotactic intracerebral electrodes. Previous reports have suggested that hypertension and… Expand
Variability of intraoperative electrocortical stimulation mapping parameters across and within individuals.
- N. Pouratian, A. Cannestra, S. Bookheimer, N. Martin, A. Toga
- Journal of neurosurgery
- 1 September 2004
OBJECT Electrocortical stimulation mapping is regarded as the gold standard of intraoperative mapping for predicting functional outcomes. Nevertheless, methodologies across institutions are… Expand
DTI correlates of distinct cognitive impairments in Parkinson's disease
- Z. Zheng, S. Shemmassian, Christopher Wijekoon, Won Kim, S. Bookheimer, N. Pouratian
- Medicine, Psychology
- Human brain mapping
- 1 April 2014
The spectrum of cognitive symptoms in Parkinson's disease (PD) can span various domains, including executive function, language, attention, memory, and visuospatial skills. These symptoms may be… Expand
Utility of preoperative functional magnetic resonance imaging for identifying language cortices in patients with vascular malformations.
OBJECT The goal of this study was to evaluate the utility of preoperative functional magnetic resonance (fMR) imaging in the prediction of whether a given cortical area would be deemed essential for… Expand
Gamma Knife Radiosurgery for Medically and Surgically Refractory Prolactinomas
- N. Pouratian, J. Sheehan, J. Jagannathan, E. Laws, L. Steiner, M. Vance
- 1 August 2006
OBJECTIVE:Experience with gamma knife radiosurgery (GKRS) for prolactinomas is limited because of the efficacy of medical and surgical intervention. Patients who are refractory to medical and/or… Expand