User profiles for A. L. Alexander

Andrew L Alexander

University of Wisconsin
Verified email at wisc.edu
Cited by 32737

[HTML][HTML] Diffusion tensor imaging of the brain

AL Alexander, JE Lee, M Lazar, AS Field - Neurotherapeutics, 2007 - Elsevier
… A recent study by Alexander et al. demonstrated that the variance in DTI measures (FA and
mean diffusivity [MD]) was reduced by roughly a factor of 2 at 3 T relative to 1.5 T, although …

Diffusion tensor imaging of cerebral white matter: a pictorial review of physics, fiber tract anatomy, and tumor imaging patterns

…, M Lazar, MS Salamat, AL Alexander - American Journal …, 2004 - Am Soc Neuroradiology
We review the normal anatomy of the white matter (WM) tracts as they appear on directional
diffusion tensor imaging (DTI) color maps, which will almost certainly be available to the …

Characterization of cerebral white matter properties using quantitative magnetic resonance imaging stains

AL Alexander, SA Hurley, AA Samsonov… - Brain …, 2011 - liebertpub.com
… eddy currents; see Alexander et al. (2007) and Tournier et al. (2011) for reviews. For most
research applications in the human brain, it is desirable to obtain isotropic spatial resolution. …

Gaze fixation and the neural circuitry of face processing in autism

…, MA Gernsbacher, HH Goldsmith, AL Alexander… - Nature …, 2005 - nature.com
Diminished gaze fixation is one of the core features of autism and has been proposed to be
associated with abnormalities in the neural circuitry of affect. We tested this hypothesis in two …

Amygdala and ventromedial prefrontal cortex are inversely coupled during regulation of negative affect and predict the diurnal pattern of cortisol secretion among …

…, CJ Frye, LL Greischar, AL Alexander… - Journal of …, 2006 - Soc Neuroscience
Among younger adults, the ability to willfully regulate negative affect, enabling effective
responses to stressful experiences, engages regions of prefrontal cortex (PFC) and the amygdala…

Analysis of partial volume effects in diffusion‐tensor MRI

AL Alexander, KM Hasan, M Lazar… - … in Medicine: An …, 2001 - Wiley Online Library
The diffusion tensor is currently the accepted model of diffusion in biological tissues. The
measured diffusion behavior may be more complex when two or more distinct tissues with …

White matter tractography using diffusion tensor deflection

…, V Haughton, A Field, AL Alexander - Human brain …, 2003 - Wiley Online Library
Diffusion tensor MRI provides unique directional diffusion information that can be used to
estimate the patterns of white matter connectivity in the human brain. In this study, the behavior …

[HTML][HTML] Specificity of ARGONAUTE7-miR390 interaction and dual functionality in TAS3 trans-acting siRNA formation

…, JT Cuperus, D Li, JE Hansen, AL Alexander… - Cell, 2008 - cell.com
Trans-acting siRNA form through a refined RNAi mechanism in plants. miRNA-guided cleavage
triggers entry of precursor transcripts into an RNA-DEPENDENT RNA POLYMERASE6 …

Diffusion tensor imaging of the corpus callosum in Autism

AL Alexander, JE Lee, M Lazar, R Boudos, MB DuBray… - Neuroimage, 2007 - Elsevier
The corpus callosum is the largest commissural white matter pathway that connects the
hemispheres of the human brain. In this study, diffusion tensor imaging (DTI) was performed on …

[PDF][PDF] Regulation of AUXIN RESPONSE FACTOR3 by TAS3 ta-siRNA affects developmental timing and patterning in Arabidopsis

…, MD Howell, E Allen, SK Dvorak, AL Alexander… - Current biology, 2006 - cell.com
… We thank Al Soeldner and Teresa Sawyer for scanning electron microscopy, Heather
Sweet for excellent plant management and care, Bobby Babra for help with RNA blot assays, …