Results 31 to 40 of about 165,980,973 (300)

pH‐Driven Actuation of Unmodified DNA Origami Rectangles

Angewandte Chemie, EarlyView.
Unmodified DNA origami rectangles exhibit a reversible transition between planar and tubular states driven by near‐neutral pH changes. This behavior arises from crossover‐mediated mechanical coupling of overwound DNA and extends to dimers and nanoribbons, enabling the formation of nanotube architectures without added motifs or chemical modification ...
Diego A. Uehara, Yasmin H. Khazid, Willi R. Berg, Veronika Valova, Felix J. Rizzuto   +4 more
wiley   +2 more sources

Willis环变异与缺血性卒中相关性的研究进展 Research Progress of the Correlation between Variation in the Circle of Willis and Ischemic Stroke

Zhongguo cuzhong zazhi
通过尸体解剖和MRA等影像学技术，学者们发现Willis环存在变异，并将其分为不同类型。依托MRA技术，根据Willis环不同动脉段直径大小，可将Willis环分为4种类型。研究发现不同类型的Willis环与缺血性卒中的发病、发生部位及复发有关，然而不同类型的Willis环与缺血性卒中的严重程度及预后的相关性存在一定的争议。本文就Willis环变异与缺血性卒中的相关性进行综述。 Abstract: In the evaluation of autopsy and MRA technology ...
曾潮坤，赵振强 (ZENG Chaokun, ZHAO Zhenqiang)
doaj   +1 more source

Thomas Willis' legacy on the 400th anniversary of his birth

Arquivos de Neuro-Psiquiatria, 2022
To celebrate the 400th anniversary of the birth of Thomas Willis, his main contributions to the development of neurosciences, in particular neurology, are presented.
Hélio Afonso Ghizoni Teive, Léo Coutinho, Carlos Henrique Ferreira Camargo, Renato Puppi Munhoz, Olivier Walusinski   +4 more
doaj   +1 more source

Visual Quantification of the Circle of Willis: An Automated Identification and Standardized Representation

, 2017
This paper presents a method for the visual quantification of cerebral arteries, known as the Circle of Willis (CoW). It is an arterial structure with the responsibility of supplying the brain with blood, however, dysfunctions can lead to strokes.
Gröller, M. E., Mistelbauer, G., Našel, C., Miao, H.   +3 more
core   +1 more source

Anatomical variations of the circle of Willis in children

, 2021
Background The morphology of the circle of Willis in adults has been thoroughly discussed in scientific literature. However, the morphology of the circle of Willis in pediatric patients is under-researched. Objectives We aimed to establish reference data
Alkan, Aykut, Süt, Necdet, Tuncbilek, Nermin, Ustabasioglu, Fethi Emre, Kula, Osman, Solak, Serdar   +5 more
core   +1 more source

High‐Resolution MRI Revealed Different Etiology‐Specific Associations With Cerebral Infarction in Adult Moyamoya Vasculopathy

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective High‐resolution MRI enables detailed assessment of intracranial vessel wall pathology in moyamoya vasculopathy. We aimed to classify adult moyamoya vasculopathy etiologies using high‐resolution MRI and to examine subtype‐specific associations between high‐resolution MRI features and ischemic infarction.
Guangsong Han, Jiachun Pan, Yuehui Hong, Xiaoyuan Fan, Ming Yao, Lixin Zhou, Yicheng Zhu, Feng Feng, Jun Ni   +8 more
wiley   +1 more source

Blood RNA Biomarker Signatures for Early Diagnosis and Prognosis in Ischemic and Hemorrhagic Stroke: The IBIS‐CT1 Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To evaluate the expression of nine blood RNA biomarkers in a clinical trial based on genes previously identified in an experimental monkey model of stroke for diagnosis feasibility and prognostication. Methods IBIS‐CT1 was a prospective longitudinal study enrolling patients with ischemic stroke (IS) or intracerebral hemorrhage (ICH ...
Salomé Retailleau, Marie Bruguet, Irina Viakhireva‐Dovganyuk, François‐Mathias Merrien, Denis Marechal, Aurore Jourdain, Philippe Goas, Jordan Coris, Julien Asselineau, Maëlys Consigny, Gérald Le Gac, Serge Timsit   +11 more
wiley   +1 more source

The association of the circle of Willis anomaly and risk of stroke in patients with carotid artery disease

Arquivos de Neuro-Psiquiatria
The circle of Willis is an important collateral system that maintains perfusion to the stenotic area from the contralateral carotid and basilar artery to the region of reduced brain perfusion.
Eylem Özaydın Göksu, Pınar Koç, Elif Küçükseymen, Ali Ünal, Fatma Genç, Elif Sarıönder Gencer, Aylin Yaman   +6 more
doaj   +1 more source

Examination of Structural Variations of the Circle of Willis by 3D Time-of-Flight Magnetic Resonance Angiography

Frontiers in Neuroscience, 2020
Objectives: To explore structural variations of the circle of Willis using three-dimensional time-of-flight magnetic resonance angiography (3D-TOF-MRA), and to compare this modality with digital subtraction angiography (DSA).Methods: A total of 819 ...
Jing Li, Jue Wang, Xiao-er Wei, Yu-wu Zhao, Feng Wang, Yue-hua Li   +5 more
doaj   +1 more source

A Comprehensive Study of the Anatomical Variations of the Circle of Willis in Adult Human Brains [PDF]

Journal of Clinical and Diagnostic Research, 2013
Background: Cerebrovascular diseases such as stroke, aneurysms and arterio-venous malformations are very much prevalent in our country. Circle of Willis, as an anastomotic polygon at the base of the brain forms an important collateral network to ...
S. Iqbal
doaj   +1 more source