Browsing by Author "Madsen, Joseph"
Now showing items 1-13 of 13
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Algorithms for design of continuum robots using the concentric tubes approach: A neurosurgical example
Anor, Tomer; Madsen, Joseph Russell; Dupont, Pierre E (IEEE, 2011)We propose a novel systematic approach to optimizing the design of concentric tube robots for neurosurgical procedures. These procedures require that the robot approach specified target sites while navigating and operating ... -
Cascade of neural processing orchestrates cognitive control in human frontal cortex
Tang, Hanlin; Yu, Hsiang-Yu; Chou, Chien-Chen; Crone, Nathan E; Madsen, Joseph R; Anderson, William S; Kreiman, Gabriel (eLife Sciences Publications, Ltd, 2016)Rapid and flexible interpretation of conflicting sensory inputs in the context of current goals is a critical component of cognitive control that is orchestrated by frontal cortex. The relative roles of distinct subregions ... -
Current dipole orientation and distribution of epileptiform activity correlates with cortical thinning in left mesiotemporal epilepsy
Reinsberger, Claus; Tanaka, Naoaki; Cole, Andrew J.; Lee, Jong Woo; Dworetzky, Barbara Ann; Bromfield, Edward B.; Hamiwka, Lorie; Bourgeois, Blaise F.D.; Golby, Alexandra Jacqueline; Madsen, Joseph Russell; Stufflebeam, Steven Marshall (Elsevier BV, 2010)To evaluate cortical architecture in mesial temporal lobe epilepsy (MTLE) with respect to electrophysiology, we analyze both magnetic resonance imaging (MRI) and magnetoencephalography (MEG) in 19 patients with left MTLE. ... -
Decrease in gamma-band activity tracks sequence learning
Madhavan, Radhika; Millman, Daniel; Tang, Hanlin; Crone, Nathan E.; Lenz, Fredrick A.; Tierney, Travis S.; Madsen, Joseph R.; Kreiman, Gabriel; Anderson, William S. (Frontiers Media S.A., 2015)Learning novel sequences constitutes an example of declarative memory formation, involving conscious recall of temporal events. Performance in sequence learning tasks improves with repetition and involves forming temporal ... -
Excess HB-EGF, which promotes VEGF signaling, leads to hydrocephalus
Shim, Joon W.; Sandlund, Johanna; Hameed, Mustafa Q.; Blazer-Yost, Bonnie; Zhou, Feng C.; Klagsbrun, Michael; Madsen, Joseph R. (Nature Publishing Group, 2016)Heparin binding epidermal growth factor-like growth factor (HB-EGF) is an angiogenic factor mediating radial migration of the developing forebrain, while vascular endothelial growth factor (VEGF) is known to influence ... -
The frequency modulated auditory evoked response (FMAER), a technical advance for study of childhood language disorders: cortical source localization and selected case studies
Duffy, Frank H; Eksioglu, Yaman Z; Rotenberg, Alexander; Madsen, Joseph R; Shankardass, Aditi; Als, Heidelise (BioMed Central, 2013)Background: Language comprehension requires decoding of complex, rapidly changing speech streams. Detecting changes of frequency modulation (FM) within speech is hypothesized as essential for accurate phoneme detection, ... -
Human seizures self-terminate across spatial scales via a critical transition
Kramer, M. A.; Truccolo, W.; Eden, U. T.; Lepage, K. Q.; Hochberg, Leigh Robert; Eskandar, Emad; Madsen, Joseph Russell; Lee, Jong Woo; Maheshwari, A.; Halgren, E.; Chu, Catherine Jean; Cash, Sydney S. (Proceedings of the National Academy of Sciences, 2012)Why seizures spontaneously terminate remains an unanswered fundamental question of epileptology. Here we present evidence that seizures self-terminate via a discontinuous critical transition or bifurcation. We show that ... -
Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy
Papadelis, Christos; Tamilia, Eleonora; Stufflebeam, Steven; Grant, Patricia E.; Madsen, Joseph R.; Pearl, Phillip L.; Tanaka, Naoaki (MyJove Corporation, 2016)Crucial to the success of epilepsy surgery is the availability of a robust biomarker that identifies the Epileptogenic Zone (EZ). High Frequency Oscillations (HFOs) have emerged as potential presurgical biomarkers for the ... -
Robotic neuro-emdoscope with concentric tube augmentation
Butler, Evan J.; Hammond-Oakley, Robert; Chawarski, Szymon; Gosline, Andrew H.; Codd, Patrick; Anor, Tomer; Madsen, Joseph Russell; Dupont, Pierre E; Lock, Jesse (IEEE, 2012)Surgical robots are gaining favor in part due to their capacity to reach remote locations within the body. Continuum robots are especially well suited for accessing deep spaces such as cerebral ventricles within the brain. ... -
Robust Selectivity to Two-Object Images in Human Visual Cortex
Agam, Yigal; Liu, Hesheng; Papanastassiou, Alexander; Buia, Calin; Golby, Alexandra Jacqueline; Madsen, Joseph Russell; Kreiman, Gabriel (Elsevier BV, 2010)We can recognize objects in complex images in a fraction of a second. Neuronal responses in macaque areas V4 and inferior temporal cortex to preferred stimuli are typically suppressed by the addition of other objects within ... -
The Spatiotemporal Dynamics of Oscillatory Activity in Humans Across Micro, Meso, and Macro Scales
Borzello, Mia; Chu, Catherine Jean; Ebrahim, S; Eskandar, Emad; Golby, Alexandra Jacqueline; Madsen, Joseph Russell; Andersen, W; Lee, Jane; Doyle, W; Thesen, T; Cash, Sydney S. (2016-11-16)Brain activity is characterized by oscillatory activity that spans at least two orders of magnitude. Previous investigations of the spatiotemporal dynamics of this wide range of oscillatory behavior has led to the concept ... -
Temporal stability of visually selective responses in intracranial field potentials recorded from human occipital and temporal lobes
Bansal, A. K.; Singer, Jedediah; Anderson, W. S.; Golby, Alexandra Jacqueline; Madsen, Joseph Russell; Kreiman, Gabriel (American Physiological Society, 2012)The cerebral cortex needs to maintain information for long time periods while at the same time being capable of learning and adapting to changes. The degree of stability of physiological signals in the human brain in ... -
Timing, Timing, Timing: Fast Decoding of Object Information from Intracranial Field Potentials in Human Visual Cortex
Liu, Hesheng; Agam, Yigal; Madsen, Joseph Russell; Kreiman, Gabriel (Elsevier BV, 2009)The difficulty of visual recognition stems from the need to achieve high selectivity while maintaining robustness to object transformations within hundreds of milliseconds. Theories of visual recognition differ in whether ...