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Showing 1 to 20 of 34 for “"conduction velocity"”.
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Estimation of peripheral nerve conduction velocity distributions from a short segment of nerve
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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Effects of Perfusate Solution Composition on the Relationship between Cardiac Conduction Velocity and Gap Junction Coupling
… differences in results when comparing cardiac conduction velocity (CV) between healthy mice and mice that were heterozygous null for the gap junction (GJ) forming protein, Connexin 43. While the results of the comparison study showed differing extracellular ionic concentrations of the …
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Descending Activation of Cockroach Giant Axons and Alterations of Their Conduction Velocity by the Local Anaesthetic-Like Activity of Nicotine
Made available in DSpace on 2015-05-14T14:58:35Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7317540.PDF: 6948398 bytes, checksum: 952b733917dcf56626507b34f6162b2d (MD5) Previous issue date: 1973
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Sodium Channel Loss of Function Sensitizes Conduction to Changes in Extracellular Sodium Concentration
… ventricular arrhythmias. Alterations in cardiac conduction, particularly the slowing of conduction velocity is one major factor in arrhythmogenesis. By understanding the mechanisms and factors that modulate cardiac conduction velocity, we can assess and perhaps mitigate the risk of arrhythmia in …
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ΜΕΛΕΤΗ ΤΩΝ ΟΠΤΙΚΩΝ ΠΡΟΚΛΗΤΩΝ ΔΥΝΑΜΙΚΩΝ ΣΤΙΣ ΑΜΦΙΒΛΗΣΤΡΟΕΙΔΟΠΑΘΕΙΕΣ
… NEURON OF THE VISUAL PATHWAYS CAUSE DELAYED CONDUCTION VELOCITY OF THE P100.
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Neural Circuitry Deficits Associated With Dysfunctional Myelin
… thereby improving the speed of saltatory conduction. In the absence of Cldn11, conduction velocity is slowed, most dramatically in small diameter myelinated fibers, somewhat analogous to reducing myelin thickness. Notably, the absence of Cldn11 is without degenerative myelin pathology, …
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Anoxia-Induced Changes in Action Potential Propagation in a Non-Myelinated Axon
… AP and the possible changes indicated above. Conduction velocity decreased over an hour of recording in all groups, except those with minimal dissections, and we observed an increase in AP half-width and a decrease in the slope of the rising phase of the AP over time. After HS pre-treatment …
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Implementation of Novel Group Delay Decomposition Method and Surgical Protocol for Assessing Peripheral Neuropathy
… an anesthetized rodent for purposes of obtaining conduction velocity readings. The ability to accurately quantify nerve conduction velocity has potential for use in the field of diagnostic medicine and disease characterization. An accurate reading depends on both the surgical method used to expose …
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Augmentations vs. Restoration: A computational study of the effects of bacterial sodium channels on cardiac conduction.
… curves for both action potential duration and conduction velocity. The single slow inactivation channel matches what has been observed in crystallography studies of other BacNav channels. Including the derived BacNav model into membrane models for guinea pig and human ventricular myocytes …
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Effect of Tai Chi Exercise Combined with Mental Imagery in Improving Balance
… were hemoglobin A1C (HbA1C), H-reflex and nerve conduction velocity test. Results: This study showed that both groups experienced significant improvements in ABC, OLS, FRT (P < 0 .01) after completing 8 weeks of TC exercise, with no significant difference improvement between groups. Subjects …
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A Discrete Monolayer Cardiac Tissue Model for Tissue Preparation Specific Modeling
… in these monolayers on the resulting wavefront conduction. Additionally when the continuous computer model is built to study impulse propagations, the intracellular conductivities of the model are commonly assigned to match impulse conduction velocity of the model to the experimental …
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Adjuncts to the Conventional 12-Lead ECG: Assessment of High-Frequency QRS Components and Additional Leads
… In Study III, patients with intraventricular conduction delay had lower HF-QRS in leads with a positive electrode facing the area of the heart with the conduction delay. In areas of the heart with normal conduction velocity, the amplitudes of HF-QRS were normal or almost normal. These findings …
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Arrhythmias in Pulmonary Hypertension
… the prevalence and clinical significance of conduction abnormalities and arrhythmias in idiopathic PAH (IPAH), using resting electrocardiograms (ECGs) and implantable cardiac monitors (ICMs), and explored the arrhythmogenic substrate using invasive and non-invasive cardiac mapping techniques. …
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Nerve Fiber Diameter Measurements Using Hematoxylin and Eosin Staining and Brightfield Microscopy to Assess the Novel Method of Characterizing Peripheral Nerve Fiber Distributions by Group Delay
… neuropathy a patient might have. The nerve conduction velocity diagnostic test provides clinically useful information in the diagnosis of some peripheral neuropathies. This method is advantageous because it tends to be minimally invasive yet it provides valuable diagnostic information. …
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DYSREGULATION of PROTEIN QUALITY CONTROL IMPAIRS FUNCTION of PRIMARY CARDIOMYOCYTES
… communication; resulting in electrical conduction abnormalities and arrhythmogenesis. Therefore, understanding the underlying mechanism the quality control of mitochondria and gap junctions profoundly contributes toward understating the genesis of cardiomyopathy. Furthermore, …
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The effect of mindfulness movement therapy on arm and hand function in people with and without stroke
… in the brain. In phase III, MMTP increased nerve conduction velocity (p=0.018) with no changes in the active control group. Moreover, motor performance speed improved in the trained upper limb (p<0.0001). In the last phase, MMTP improved spasticity of the elbow flexor (p=0.025) and finger flexors …
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Functional Spectral Domain Optical Coherence Tomography Imaging
… SDPM and a depth-encoded technique for measuring conduction velocity. </p><p>Results from amplitude as well as both coarse and fine phase processing are presented. In-vivo optophysiology using SDPM is a promising avenue for exploration, and projects furthering or extending this body of work are …
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Modulation of Axonal Transmission by Metabolic Stress
… reported after an anoxic coma, reducing conduction velocity (CV) and the number of elicited, high-frequency APs. However, starvation had little effect on the DCMD's performance, and 1-day starvation increased the number of high-frequency APs, suggesting an increase in energy consumption. …
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Functional contributions of a sex-specific population of myelinated aortic baroreceptors in rat and their changes following ovariectomy
… rats. Our results revealed sexually dimorphic conduction velocity (CV) profiles. A distinct, slower myelinated fiber volley was apparent in compound action potential (CAP) recordings from female aortic BR fibers, with an amplitude and CV not observed in males. Subsequent BRx studies …
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Human physiological and biomechanical responses to vibration exercise
… and blood pressure remained constant, blood flow velocity significantly increased, suggesting the peripheral changes occurred independently of central cardiovascular function. Heel raise exercises with whole body vibration showed significant increases in muscle activation of the soleus, but not …
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