Glenn Meyer

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OBJECTIVE To illustrate how lesion-induced neurovascular uncoupling at functional magnetic resonance imaging (fMRI) can mimic hemispheric dominance opposite the side of a lesion preoperatively. METHODS We retrospectively reviewed preoperative fMRI mapping data from 50 patients with focal brain abnormalities to establish patterns of hemispheric dominance(More)
OBJECTIVE The objective of this study was to evaluate the complication rate of transtemporal cranioplasties using hydroxyapatite cement (HAC) for repair. STUDY DESIGN We conducted a retrospective case review of patients receiving HAC cranioplasties in the Acoustic Neuroma and Skull Base Surgery Program between July 1998 and December 2002. SETTING This(More)
Neuroradiologists generally do not fully appreciate the importance of the territory of the ascending pharyngeal artery. The ascending pharyngeal artery is a small but important artery that supplies multiple cranial nerves and anastomotic channels to the anterior and posterior cerebral circulations. Several disease processes in the head and neck involve the(More)
INTRODUCTION Photodynamic therapy (PDT) involves the selective retention of a photosensitizer that upon activation with light mediates tumor cell destruction via the production of singlet oxygen. This study evaluates the toxicity of PDT and a new light-delivery device based on light-emitting diode (LED) technology in selected patients with brain tumors. (More)
Magnetic resonance imaging (MR) of the optic nerves and chiasm was compared with computed tomography (CT) in 4 healthy volunteers, 4 patients without orbital or chiasmal abnormalities, and 4 patients with tumor (anterior clinoid meningioma in 2, optic nerve glioma in 1, and optic nerve sheath meningioma in 1). MR was found to be effective in demonstrating(More)
The significance of facial nerve enhancement after IV gadolinium administration has not been determined. We evaluated the MR appearance of facial nerves (nonenhanced and enhanced) in patients without and with masses involving the temporal bone, internal auditory canal, or cerebellopontine angle. In patients without such masses, no facial nerve enhancement(More)
Computed tomography is effective for detecting acoustic neuromas, but not for resolving individual nerves in the internal auditory canal. Surface-coil magnetic resonance (MR) images of the internal auditory canal were obtained using a 1.5 T superconducting magnet, a 13.5-cm-diameter surface coil, 3- and 5-mm-thick slices, and partial-saturation pulse(More)
  • Tony Hainault, Douglas S Smith, David J Cauchi, David A Thompson, Michael M Fisher, Colleen Hetzel +17 others
  • 2001
Acknowledgments The project partners wish to thank the collection site hosts for their dedication and commitment to the project. This work could not have been done without their efforts. The project partners would also like to give special thanks to MBA Polymers for their unique technical contributions to the plastics evaluation phase of the study. The(More)
BACKGROUND Chiari type I malformations (Chiari I) are congenital deformities where caudal migration of the cerebellar tonsils through the foramen magnum compresses the cerebellum and cervicomedullary junction (lower brainstem and upper cervical spinal cord). Associations with chronic fatigue syndrome, fibromyalgia, orthostatic intolerance, and other(More)