Results 61 to 70 of about 932,523 (265)

White Matter and Perivascular Imaging Changes in Alzheimer's Disease and Cerebral Amyloid Angiopathy

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Peak‐width of skeletonized mean diffusivity (PSMD) and diffusion tensor imaging–analysis along the perivascular space (DTI‐ALPS), reflecting white matter integrity and glymphatic function, are altered in Alzheimer's disease (AD).
Debina Laishram, Guangwei Du, Sangam Kanekar, Nandakumar Nagaraja   +3 more
wiley   +1 more source

CONDUCTION VELOCITY AND AXONAL DIAMETER OF ALIMENTARY C FIBRES [PDF]

Quarterly Journal of Experimental Physiology, 1984
Experiments were undertaken to investigate the numerical relationship between the axon diameter and conduction velocity (scaling factor) of non‐myelinated axons supplying the duodenum of the sheep and rabbit. Transmission electron microscopy and light microscopy of duodenal nerves showed distinct species differences.
openaire   +2 more sources

An Epigenetic Fate Converter Based on Nuclei‐Targeting Lipid Nanoparticles Drives Neuronal Programming of Stem Cells for Spinal Cord Repair

Advanced Functional Materials, EarlyView.
Schematic illustration of LNP‐MPG nuclei‐targeting delivery of HMW‐FGF2 promoting histone acetylation to regulate the fate of DPSCs and treat spinal cord injury. LNPs components include pHMW‐FGF2 plasmid, DSPC, Dlin‐MC3‐DMA, cholesterol, and PEG2000, and are modified with MPG to form HMW‐FGF2@LNP‐MPG (HLM). HLM nuclei‐targets DPSCs to deliver HMW‐FGF2,
Heng Zhou, Qiang Qin, Xiqin Li, Hanyu Ding, Chun Xu, Yan He, Qingsong Ye   +6 more
wiley   +1 more source

A Magneto‐Mechanically Activated Nerve Guidance Conduit Promotes Peripheral Nerve Regeneration via TIMP1‐Mediated Membrane Tension Transfer

Advanced Functional Materials, EarlyView.
This study presents a magneto‐mechanical strategy that incorporates FP@MSCs into an aligned PCL/GelMA nerve guidance conduit. Magnetic stimulation increases membrane tension in FP@MSCs, triggering cytoskeletal remodeling, Schwann cell‐like differentiation, and TIMP1 secretion. TIMP1 activates ITGB1/CD63–FAK signaling in NE‐4C cells, increasing membrane
Xinyu Zhu, Yumin Wu, Xiang Gao, Tianlu Wang, Wanting Jia, Xueying Mei, Huanzhong Ji, Zongxi Wu, Yujie Liang, Xiang Li, Kan Li, Jingyuan Li, Guangsen Zheng, Guiqing Liao, Siyong Gao   +14 more
wiley   +1 more source

Axon diameters and conduction velocities in the macaque pyramidal tract

Journal of Neurophysiology, 2014
Small axons far outnumber larger fibers in the corticospinal tract, but the function of these small axons remains poorly understood. This is because they are difficult to identify, and therefore their physiology remains obscure. To assess the extent of the mismatch between anatomic and physiological measures, we compared conduction time and velocity ...
L. Firmin, P. Field, M. A. Maier, A. Kraskov, P. A. Kirkwood, K. Nakajima, R. Lemon, M. Glickstein   +7 more
openaire   +2 more sources

Axon Diameter Mapping in the Presence of Orientation Dispersion with Diffusion MRI [PDF]

, 2010
Direct measurement of tissue microstructure with diffusion MRI offers a new class of biomarkers, such as axon diameters, that give more specific information about tissue than measures derived from diffusion tensors. The existing techniques of this kind assume a single axon orientation in the tissue model, which may be a reasonable approximation only ...
Hui Zhang 0005, Daniel C. Alexander
openaire   +2 more sources

Human iPSC‐Derived Tissue‐Engineered Nigrostriatal Pathway for Chronic Restoration of Dopaminergic Axon Tracts in a Rat Parkinson's Model

Advanced Healthcare Materials, EarlyView.
Inspired by conventional cell therapy and emerging bioengineering approaches, the tissue‐engineered nigrostriatal pathway (TE‐NSP) has an anatomically‐inspired design comprising a population of human dopaminergic neurons with unidirectional, long‐projecting axon tracts.
Wisberty J. Gordián‐Vélez, Dimple Chouhan, Kevin D. Browne, James Lim, Saarang P. Karandikar, Rodrigo A. España, John E. Duda, H. Isaac Chen, D. Kacy Cullen   +8 more
wiley   +1 more source

Myelination and isochronicity in neural networks

Frontiers in Neuroanatomy, 2009
Our brain contains a multiplicity of neuronal networks. In many of these, information sent from presynaptic neurons travels through a variety of pathways of different distances, yet arrives at the postsynaptic cells at the same time.
Fumitaka Kimura, Chiaki Itami
doaj   +1 more source

Neurotoxicity of bupivacaine and liposome bupivacaine after sciatic nerve block in healthy and streptozotocin-induced diabetic mice

BMC Veterinary Research, 2020
Background Long-acting local anaesthetics (e.g. bupivacaine hydrochloride) or sustained-release formulations of bupivacaine (e.g. liposomal bupivacaine) may be neurotoxic when applied in the setting of diabetic neuropathy.
Liljana Markova, Nejc Umek, Simon Horvat, Admir Hadžić, Max Kuroda, Tatjana Stopar Pintarič, Vesna Mrak, Erika Cvetko   +7 more
doaj   +1 more source

Inflammation contributes to axon reflex vasodilatation evoked by iontophoresis of an alpha-1 adrenoceptor agonist [PDF]

, 2011
Iontophoresis of aradrenoceptor agonists in the human forearm evoke axon reflex vasodilatation, possibly due to an accumulation of inflammatory agents at the site of iontophoresis.
Drummond, P.D.
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