Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Justin Hulvershorn"'
Publikováno v:
Journal of Clinical Monitoring and Computing. 35:1477-1483
The purpose of this study was to compare train-of-four count and ratio measurements with the GE electromyograph to the TwitchView electromyograph, that was previously validated against mechanomography, and to palpation of train-of-four count. Electro
Autor:
Bala G. Nair, Andrew Bowdle, Kei Togashi, Kelly Michaelsen, Justin Hulvershorn, Srdjan Jelacic, Logan Bussey
Publikováno v:
Anaesthesia
Summary The extent of neuromuscular blockade during anaesthesia is frequently measured using a train‐of‐four stimulus. Various monitors have been used to quantify the train‐of‐four, including mechanomyography, acceleromyography and electromyo
Autor:
Srdjan Jelacic, Kelly Michaelsen, Kei Togashi, Justin Hulvershorn, Bala G. Nair, Logan Bussey, Andrew Bowdle
Publikováno v:
British journal of anaesthesia. 124(6)
Background Train-of-four twitch monitoring can be performed using palpation of thumb movement, or by the use of a more objective quantitative monitor, such as mechanomyography, acceleromyography, or electromyography. The relative performance of palpa
Publikováno v:
NeuroImage. 49:9-18
Introduction Previous stroke studies using fMRI or lesion characterization methods to study the preservation of motor performance have been limited in defining anatomical structure critical for functional performance. This study attempts to overcome
Autor:
Arijitt Borthakur, Andrew J. Wheaton, Mark A. Elliott, Sridhar R. Charagundla, Eugene Gualtieri, Ravinder Reddy, Justin Hulvershorn
Publikováno v:
Journal of Magnetic Resonance Imaging. 23:591-596
T1P OR “SPIN-LOCKED” MRI produces contrast unlike conventional T1-orT2-weighted images. Spin-locking is achieved by the application of a low power on-resonance radiofrequency (RF) pulse to the magnetization in the transverse plane. The resulting
Autor:
Eugene Gualtieri, Arijitt Borthakur, Luke Bloy, John S. Leigh, Mark A. Elliott, Ravinder Reddy, Justin Hulvershorn
Publikováno v:
Magnetic Resonance in Medicine. 54:1155-1162
The most frequently used sequence in functional MRI (fMRI) studies, gradient-echo (GE) echo-planar imaging (EPI), is particularly sensitive to changes in the oxygenation state of hemoglobin, commonly referred to as blood oxygenation level-dependent (
Autor:
John S. Leigh, Eugene Gualtieri, Christopher P. Redmann, Luke Bloy, Mark A. Elliott, Justin Hulvershorn
Publikováno v:
Hum Brain Mapp
The temporal resolving power of blood oxygenation level‐dependent (BOLD) functional magnetic resonance imaging (fMRI) at 3T was investigated in the visual and auditory cortices of the human brain. By using controlled temporal delays and selective v
Publikováno v:
Academic Radiology. 11:1005-1010
Rationale and objectives Subject motion is well recognized as a significant impediment to resolution and sensitivity in functional magnetic resonance imaging (fMRI). A parallel confounder to fMRI data quality is geometric image distortion, particular
Publikováno v:
Review of Scientific Instruments. 74:4150-4157
A continuous wave near infrared three-wavelength laser diode spectroscopic (NIRS) system designed for use in magnetic resonance imaging (MRI) scanners is described. This system measures in vivo changes in the concentrations of oxyhemoglobin (HbO) and
Autor:
Justin Hulvershorn, Zachariah G. Goldsmith, John C. Haselgrove, Jonathan Raz, Atsushi Miki, John B. Siegfried, Lan Zhou, Grant T. Liu
Publikováno v:
Ophthalmic Research. 33:180-184
We studied functional magnetic resonance imaging (fMRI) of visual cortex during checkerboard visual stimulation with three standard check sizes to examine whether activation in the visual cortex varied among these sizes. We acquired fMRI at 1.5 T in