Chronicle definition is a historical account of events arranged in order of time usually without analysis or interpretation. Information and translations of chronaxie in the most comprehensive dictionary definitions resource on the web. His bundle has a shorter chronaxie than does the adjacent. A measurement of excitability of nervous or muscular tissue. Convert pdf to word in one click with convertpdftoword. Chronaxie definition is the minimum time required for excitation of a. A less excitable tissue has a longer chronaxie, whereas a more excitable tissue has a shorter one. Convert pdf to word free online pdf to word converter. Full list of words that end with az words ending with e. Chronaxie is defined as the shortest duration of stimulus required to excite a tissue by a current strength equal to twice of rheobase voltage. From the graph above, the rheobase is approximately 0. Edit any document, including images, paragraphs and pages. Electrical stimulation based on chronaxie reduces atrogina1 and. Objective we aimed to calculate strengthduration curve and chronaxie of the his bundle hb and of the adjacent right ventricular rv working myocardium and to analyze zones of selective hb capture and battery current drain when pacing at different pulse.
Chronaxie definition and meaning collins english dictionary. Convert pdf files to and from any microsoft office formaton the desktop with nitro pro or in any web browser with nitro cloud. To investigate these points, the responses of calliactis parasitica to mechanical and electrical stimuli have been. In neuroscience, rheobase is the minimal current amplitude of infinite duration in a practical sense, about 300 milliseconds that results in the depolarization threshold of the cell membranes being reached, such as an action potential or the contraction of a muscle. Blair and erlanger in 1933 demonstrated that the chronaxie of frog fibers is almost constant in the velocity range between 7 and 30 m. The effect of pacing rate on the atrial strengthduration relation was determined in 10 patients at pacing rates between 125 and 300 beatstmin to explore excitability over the range of rates used for permanent antitachycardia. In other words, the stimulus strength required to reach threshold should decrease during. Effect of pacing rate on the human atrial strength. The early years herman kabat was born on january 8, 19, in brooklyn, new york, the son of samuel and mary kronick kabat. In a strengthduration curve for muscle stimulation, it is the pulse width at a voltage twice that at the rheobase. The greek term chronos, meaning time, has been adopted across many different languages, including english, to refer to words where the. Pdf converter is a online webbased document to pdf converter software. Pdf the chronaxie time and its practical importance.
Chronaxie article about chronaxie by the free dictionary. Edit any pdf file, including all images, paragraphs, and pages. Determining rheobase and chronaxie from a strength. This study evaluated the effect of es based on chronaxie and rheobase on the expres. Response is said to vary with the strength of stimulus.
Certain features have been supposed to characterise the nerve net. What is the meaning of the root chron in words like. Strengthduration curve definition of strengthduration. Chronaxie definition is the minimum time required for excitation of a structure such as a neuron by a constant electric current of twice the threshold voltage. Chronaxie the minimum time required for a constant electric current of twice the threshold voltage to excite tissue. Chronaxie definition of chronaxie by merriamwebster. Pdf determination of the chronaxie and rheobase of denervated. Pdf differences in rheobase and chronaxie between the. Has the muscular substance a longer chronaxie than the nervous. Find the pdf, and open it you might have to select browse and find the pdf in a folder. Information and translations of chroneme in the most comprehensive dictionary definitions resource on the web. Rheobase is a measure of membrane potential excitability.
Temperature dependence of the myocardial excitability of. The root word chron means time and axie means axis. Word tells you that its going to make a copy of the pdf and convert its contents into a format that word can display. The effect of rapid pacing on the atrial constant voltage stimulation threshold in humans has not been defined at rates applicable to those of antitachycardia pacing. Convert and create pdf from various types of files like word doc, excel xls, powerpoint ppt. Describing mathematically, the intensity duration curves of electrostimulation by hyperbolas, lapicque introduced two terms which characterized the functional relationship. Chronaxie is the minimum time required for an electric current to double the strength of the. Chronaxie also varies along the neural axis, being small for electrode positions at the. The muchanticipated fifth edition of the american heritage dictionary of the english language is the premier resource about words for people who seek to know more and find fresh perspectives.
Exhaustively researched and thoroughly revised, the fifth edition contains 10,000 new words and senses, over 4,000 dazzling new fullcolor images, and authoritative, uptodate guidance on usage from the. The chronaxie time and its practical importance article pdf available in pacing and clinical electrophysiology 33. Rheobase is the lowest intensity with indefinite pulse duration which just stimulated muscles or nerves. The concept of chronaxie was introduced in 1909 by the french physiologist l. Therefore, this data may contribute to our understanding of the muscle status of stroke patients.
Chronaxie of a tissue is a definite measure of its excitability. His bundle has shorter chronaxie than adjacent ventricular. Differences in rheobase and chronaxie between the paretic and nonparetic sides of hemiplegic stroke patients. Curve also provides another piece of information, the chronaxie. Create pdf files from scratch, or merge and combine documents.
The threshold in other words is not sharply defined, but is graded according to an accumulative chance distribution over a con siderable range of stimulus values. In greek, the root rhe translates to current or flow, and basi means. In other words, the zone of selective hb capture is widening with. Differences in rheobase and chronaxie between the paretic. Free pdf to word doc converter, this allows you to convert your pdf files to word doc for free. Chron definition, variant of chrono before a vowel. Exporting to pdf use print icon in the share n print section to export the results as pdf document. This free online pdf to doc converter allows you to convert a pdf document to microsoft word doc format, providing better quality than many other converters.
Chronicle definition of chronicle by merriamwebster. Synonyms for chronology include account, chronicle, commentaries, commentary, history, narration, narrative, record, report and story. Besides the rheobase, the strengthduration curve also provides another piece of information, the chronaxie. Differences in rheobase and chronaxie between the paretic and nonparetic sides of hemiplegic stroke patients discussion stroke is a leading cause of neurological disability among adults and often leads to functional deficits in motor control 4, 5, 11, 12. The root word rheo means current and base means foundation. Strengthduration relationship for intra versus extracellular. Rheobase was the lowest intensity with indefinite pulse duration which just stimulated muscles or nerves.
Chronaxie is the minimum time required for an electric current to double the strength of the rheobase to stimulate a muscle or a neuron. Differences in rheobase and chronaxie between the paretic and. Chronaxie definition of chronaxie by medical dictionary. Choose from 54 different sets of chron prefix flashcards on quizlet. Tamil english translation online, dictionaries and. Chronaxie definition of chronaxie by the free dictionary. Phantompdf is the pdf editor that is enterprise ready. The chronaxie is a duration measurement, corresponding to twice the rheobase. Chronaxie definition, the minimum time that an electric current of twice the threshold strength must flow in order to excite a tissue.
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