Infarto cortical laminar extenso como presentación de una oclusión aguda en tándem de arterias cerebral media, cerebral anterior y carótida interna.

2021 ◽  
pp. 1-1
Author(s):  
Guillermo González Ortega
Keyword(s):  
Cortical Laminar

MRI Findings of Cortical Laminar Necrosis

1996 ◽  
Vol 35 (5) ◽  
pp. 661
Author(s):  
Sai Ra Yoon ◽  
Jae Chan Shim ◽  
Ghi Jae Lee ◽  
Seong Wook Choi ◽  
Su Ok Seong ◽  
...  
Keyword(s):  
Mri Findings ◽  
Cortical Laminar Necrosis ◽  
Cortical Laminar ◽  
Laminar Necrosis

scholarly journals Advanced magnetic resonance imaging of cortical laminar necrosis in patients with stroke

2019 ◽  
Vol 32 (6) ◽  
pp. 431-437 ◽  
Author(s):  
Roberto Cannella ◽  
Gianvincenzo Sparacia ◽  
Vincenzina Lo Re ◽  
Elisa Oddo ◽  
Giuseppe Mamone ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Acute Stage ◽  
Arterial Spin Labelling ◽  
Resonance Imaging ◽  
Cortical Laminar Necrosis ◽  
Diffusion Weighted ◽  
Cortical Laminar ◽  
Laminar Necrosis ◽  
Spin Labelling

Purpose The aim of this study was to assess the novel advanced magnetic resonance imaging findings of acute stage cortical laminar necrosis developing after complicated cardiovascular or abdominal surgery. Materials and methods This institutional review board-approved study included patients with postoperative stroke due to cortical laminar necrosis imaged with magnetic resonance in the acute stage. Brain magnetic resonance imaging examinations were obtained on a 3T magnetic resonance scanner within 48 hours of the neurological symptoms, including diffusion-weighted images (b value, 1000 s/mm2) and arterial spin labelling using a pseudo-continuous arterial spin labelling method in four patients. Conventional and advanced magnetic resonance images were analysed to assess the imaging features in acute stage cortical laminar necrosis. Results The final population consisted of 14 patients (seven men and seven women, mean age 61 years, range 32–79 years) diagnosed with stroke and acute phase cortical laminar necrosis. All the patients presented with cortical lesions showing restricted diffusion on diffusion-weighted images and hypointensity on the apparent diffusion coefficient map. Cortical hyperintensity on T2-weighted or fluid-attenuated inversion recovery images was found in three (21%) and six (43%) patients, respectively. Reduced perfusion was noted in three out of four patients imaged with arterial spin labelling, while in one case no corresponding perfusion abnormality was noted on the arterial spin labelling maps. Arterial spin labelling abnormalities were much more extensive than diffusion restriction in two patients, and they were associated with a poor outcome. Conclusion Cortical hyperintense abnormalities on diffusion-weighted imaging may be the only sign of developing cortical laminar necrosis injury. The acquisition of arterial spin labelling helps to identify perfusion alterations and the extension of the ischaemic injury.

scholarly journals Feedforward and feedback frequency-dependent interactions in a large-scale laminar network of the primate cortex

2016 ◽  
Vol 2 (11) ◽  
pp. e1601335 ◽  
Author(s):  
Jorge F. Mejias ◽  
John D. Murray ◽  
Henry Kennedy ◽  
Xiao-Jing Wang
Keyword(s):  
Large Scale ◽  
Complex Dynamics ◽  
Predictive Coding ◽  
Causality Analysis ◽  
Frequency Dependent ◽  
Brain Functions ◽  
Wide Range ◽  
Cortical Laminar ◽  
Feedback Frequency ◽  
Visual Cortical

Interactions between top-down and bottom-up processes in the cerebral cortex hold the key to understanding attentional processes, predictive coding, executive control, and a gamut of other brain functions. However, the underlying circuit mechanism remains poorly understood and represents a major challenge in neuroscience. We approached this problem using a large-scale computational model of the primate cortex constrained by new directed and weighted connectivity data. In our model, the interplay between feedforward and feedback signaling depends on the cortical laminar structure and involves complex dynamics across multiple (intralaminar, interlaminar, interareal, and whole cortex) scales. The model was tested by reproducing, as well as providing insights into, a wide range of neurophysiological findings about frequency-dependent interactions between visual cortical areas, including the observation that feedforward pathways are associated with enhanced gamma (30 to 70 Hz) oscillations, whereas feedback projections selectively modulate alpha/low-beta (8 to 15 Hz) oscillations. Furthermore, the model reproduces a functional hierarchy based on frequency-dependent Granger causality analysis of interareal signaling, as reported in recent monkey and human experiments, and suggests a mechanism for the observed context-dependent hierarchy dynamics. Together, this work highlights the necessity of multiscale approaches and provides a modeling platform for studies of large-scale brain circuit dynamics and functions.

scholarly journals Cortical laminar necrosis in an infant with influenza A virus infection

2020 ◽  
Vol 8 (9) ◽  
pp. 1843-1844
Author(s):  
Kazufumi Yaginuma ◽  
Masahiro Watanabe ◽  
Yuichi Suzuki ◽  
Kazuhide Suyama ◽  
Koichi Hashimoto ◽  
...  
Keyword(s):  
Virus Infection ◽  
Influenza A Virus ◽  
Influenza A ◽  
Cortical Laminar Necrosis ◽  
Cortical Laminar ◽  
Laminar Necrosis ◽  
Influenza A Virus Infection

scholarly journals Exploring the laminar connectome

2021 ◽  
Author(s):  
Ittai Shamir ◽  
Omri Tomer ◽  
Ronnie Krupnik ◽  
Yaniv Assaf
Keyword(s):  
White Matter ◽  
Grey Matter ◽  
Structural Description ◽  
Mri Imaging ◽  
Healthy Human ◽  
Cortical Grey Matter ◽  
Cortical Laminar ◽  
White Matter Connectivity ◽  
Human Brains

The human connectome is the complete structural description of the network of connections and elements that form the wiring diagram of the brain. Because of the current scarcity of information regarding laminar end points of white matter tracts inside cortical grey matter, tractography remains focused on cortical partitioning into regions, while ignoring radial partitioning into laminar components. To overcome this biased representation of the cortex as a single homogenous unit, we use a recent data-derived model of cortical laminar connectivity, which has been further explored and corroborated in the macaque brain by comparison to published studies. The model integrates multimodal MRI imaging datasets regarding both white matter connectivity and grey matter laminar composition into a laminar-level connectome. In this study we model the laminar connectome of healthy human brains (N=20) and explore them via a set of neurobiologically meaningful complex network measures. Our analysis demonstrates a subdivision of network hubs that appear in the standard connectome into each individual component of the laminar connectome, giving a fresh look into the role of laminar components in cortical connectivity and offering new prospects in the fields of both structural and functional connectivity.

scholarly journals The Effect of Hypothermia Therapy on Cortical Laminar Disruption following Ischemic Injury in Neonatal Mice

PLoS ONE ◽  
2013 ◽  
Vol 8 (7) ◽  
pp. e68877 ◽  
Author(s):  
Hiroyuki Kida ◽  
Sadahiro Nomura ◽  
Mizuya Shinoyama ◽  
Makoto Ideguchi ◽  
Yuji Owada ◽  
...  
Keyword(s):  
Ischemic Injury ◽  
Neonatal Mice ◽  
Cortical Laminar

Reye's syndrome with cortical laminar necrosis: MRI

1996 ◽  
Vol 38 (3) ◽  
pp. 269-272 ◽  
Author(s):  
T. Kinoshita ◽  
S. Takahashi ◽  
K. Ishii ◽  
S. Higano ◽  
K. Matsumoto ◽  
...  
Keyword(s):  
Reye's Syndrome ◽  
Cortical Laminar Necrosis ◽  
Cortical Laminar ◽  
Laminar Necrosis
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