Bibliografías temáticas / Tremor amplitude

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Literatura académica sobre el tema "Tremor amplitude"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 19 de febrero de 2023

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Artículos de revistas sobre el tema "Tremor amplitude"

Kreiman, Jody, Brian Gabelman, and Bruce R. Gerratt. "Perception of Vocal Tremor." Journal of Speech, Language, and Hearing Research 46, no. 1 (February 2003): 203–14. http://dx.doi.org/10.1044/1092-4388(2003/016).

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Vocal tremors characterize many pathological voices, but acoustic-perceptual aspects of tremor are poorly understood. To investigate this relationship, 2 tremor models were implemented in a custom voice synthesizer. The first modulated fundamental frequency (F0) with a sine wave. The second provided irregular modulation. Control parameters in both models were the frequency and amplitude of the F0 modulating waveform. Thirty-two 1-s samples of /a/, produced by speakers with vocal pathology, were modeled in the synthesizer. Synthetic copies of each vowel were created by using tremor parameters d

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Sabah najim, Nawras, Abdulnasir H. Ameer, and Azad A. Mohammed. "The Electrophysiological Perspectives of Essential, Enhanced Physiological, and Physiological Tremors." Journal of the Faculty of Medicine Baghdad 64, no. 2 (July 24, 2022): 86–90. http://dx.doi.org/10.32007/jfacmedbagdad.6421921.

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Abstract: Background: The most frequent movement issue seen in clinical practice is tremors. It is known as repetitive, involuntary oscillations. The diagnostic process for tremor patients can be time-consuming and complicated, as the identification of “Essential Tremor” and its distinction from other types of tremor. Objectives: This study aimed to describe the electrophysiological findings of essential, enhanced physiological, and physiological tremors, using surface electromyography and an accelerometer. Patients and Methods: The study included 24 patients with essential tremors, 10 patient

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Samotus, Olivia, Jack Lee, and Mandar Jog. "Developing a Consistent, Reproducible Botulinum Toxin Type A Dosing Method for Upper Limb Tremor by Kinematic Analysis." Toxins 13, no. 4 (April 8, 2021): 264. http://dx.doi.org/10.3390/toxins13040264.

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Botulinum toxin type A (BoNT-A) injection patterns customized to each patient’s unique tremor characteristics produce better efficacy and lower adverse effects compared to the fixed-muscle-fixed-dose approach for Essential Tremor (ET) and Parkinson’s disease (PD) tremor therapy. This article outlined how a kinematic-based dosing method to standardize and customize BoNT-A injections for tremors was developed. Seven ET and eight PD participants with significant tremor reduction and minimal perceived weakness using optimized BoNT-A injections determined by clinical and kinematic guidance were ret

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HEO, JAE-HOON, HYEONG-MIN JEON, EUI-BUM CHOI, DO-YOUNG KWON, and GWANG-MOON EOM. "EFFECT OF SENSORY ELECTRICAL STIMULATION ON RESTING TREMORS IN PATIENTS WITH PARKINSON’S DISEASE AND SWEDDs." Journal of Mechanics in Medicine and Biology 19, no. 07 (November 2019): 1940033. http://dx.doi.org/10.1142/s0219519419400335.

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Patients with scans without evidence of dopaminergic deficits (SWEDDs) show symptoms (e.g., tremors) similar to those of Parkinson’s disease (PD) patients, so they are often misdiagnosed. Sensory electrical stimulation (SES) was reported to suppress essential tremor in patients, but SES was never applied to patients with PD and SWEDDs. As the pathophysiological mechanisms of PD and SWEDDs are likely to be different, we hypothesized that the effect of SES would also be different in the two patient groups. This study aimed to test that hypothesis. Fourteen patients with PD and nine with SWEDDs p

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Dirkx, Michiel F., Heidemarie Zach, Bastiaan R. Bloem, Mark Hallett, and Rick C. Helmich. "The nature of postural tremor in Parkinson disease." Neurology 90, no. 13 (February 23, 2018): e1095-e1103. http://dx.doi.org/10.1212/wnl.0000000000005215.

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ObjectiveTo disentangle the different forms of postural tremors in Parkinson disease (PD).MethodsIn this combined observational and intervention study, we measured resting and postural tremor characteristics in 73 patients with tremulous PD by using EMG of forearm muscles. Patients were measured both “off” medication (overnight withdrawal) and after dispersible levodopa-benserazide 200/50 mg. We performed an automated 2-step cluster analysis on 3 postural tremor characteristics: the frequency difference with resting tremor, the degree of tremor suppression after posturing, and the dopamine res

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Milanov, Ivan. "Clinical and Electromyographic Examinations of Patients with Essential Tremor." Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques 27, no. 1 (February 2000): 65–70. http://dx.doi.org/10.1017/s0317167100052008.

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ABSTRACT:Background:It is believed that no clinical differences exist among essential, familial and senile tremor, or between the tremor with synchronous or alternating electromyographic activity. The aim of this study was to evaluate the clinical and electromyographic findings in a large group of patients with different types of essential tremor.Methods:Two hundred and twenty patients with sporadic, familial or senile variants of essential tremor were examined. According to the electromyographic activity recorded from the antagonistic muscles, the patients were subdivided into a group with sy

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Kim, Jeonghee, Thomas Wichmann, Omer T. Inan, and Stephen P. DeWeerth. "Analyzing the Effects of Parameters for Tremor Modulation via Phase-Locked Electrical Stimulation on a Peripheral Nerve." Journal of Personalized Medicine 12, no. 1 (January 8, 2022): 76. http://dx.doi.org/10.3390/jpm12010076.

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(1) Background: Non-invasive neuromodulation is a promising alternative to medication or deep-brain stimulation treatment for Parkinson’s Disease or essential tremor. In previous work, we developed and tested a wearable system that modulates tremor via the non-invasive, electrical stimulation of peripheral nerves. In this article, we examine the proper range and the effects of various stimulation parameters for phase-locked stimulation. (2) Methods: We recruited nine participants with essential tremor. The subjects performed a bean-transfer task that mimics an eating activity to elicit kinetic

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Berbakov, Lazar, Čarna Jovanović, Marina Svetel, Jelena Vasiljević, Goran Dimić, and Nenad Radulović. "Quantitative Assessment of Head Tremor in Patients with Essential Tremor and Cervical Dystonia by Using Inertial Sensors." Sensors 19, no. 19 (September 30, 2019): 4246. http://dx.doi.org/10.3390/s19194246.

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Tremor is most common among the movement disabilities that affect older people, having a prevalence rate of 4.6% in the population older than 65 years. Despite this, distinguishing different types of tremors is clinically challenging, often leading to misdiagnosis. However, due to advances in microelectronics and wireless communication, it is now possible to easily monitor tremor in hospitals and even in home environments. In this paper, we propose an architecture of a system for remote health-care and one possible implementation of such system focused on head tremor monitoring. In particular,

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Cichaczewski, Ederson, Renato P. Munhoz, Joaquim M. Maia, Percy Nohama, Edison M. Nóvak, and Helio A. Teive. "Electrophysiologic characteristics of tremor in Parkinson?s disease and essential tremor." Arquivos de Neuro-Psiquiatria 72, no. 4 (April 2014): 301–6. http://dx.doi.org/10.1590/0004-282x20140006.

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Tremor in essential tremor (ET) and Parkinson’s disease (PD) usually present specific electrophysiologic profiles, however amplitude and frequency may have wide variations. Objective: To present the electrophysiologic findings in PD and ET. Method: Patients were assessed at rest, with posture and action. Seventeen patients with ET and 62 with PD were included. PD cases were clustered into three groups: predominant rest tremor; tremor with similar intensity at rest, posture and during kinetic task; and predominant kinetic tremor. Results: Patients with PD presented tremors with average frequenc

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Mostile, Giovanni, Robert Fekete, Joseph P. Giuffrida, Toby Yaltho, Anthony Davidson, Alessandra Nicoletti, Mario Zappia, and Joseph Jankovic. "Amplitude fluctuations in essential tremor." Parkinsonism & Related Disorders 18, no. 7 (August 2012): 859–63. http://dx.doi.org/10.1016/j.parkreldis.2012.04.019.

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Tesis sobre el tema "Tremor amplitude"

Keogh, Justin W. L., and n/a. "Constraints on the Control of Physiological Tremor." Griffith University. School of Physiotherapy and Exercise Science, 2006. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20070208.110453.

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This thesis sought to: 1) examine the effect of a number of organism and task constraints on the control of two forms of physiological tremor, namely postural and finger-pinch force tremor; and 2) determine if the expected constraint-related changes in tremor output were associated with alterations in the control strategy utilised by the performer. The organism constraints were age and resistance-training (for both forms of tremor), while the task constraints were visual feedback, target size and limb preference (postural tremor) and mean force, target shape and limb preference (force tremor)

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Meshack, Rubia Parwyn. "The effects of weights on the amplitude and frequency of postural hand tremor in people with Parkinson's disease." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63339.pdf.

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Ardiani, Mei Astrid, and 安蒂美. "Duration-amplitude scaling of volcanic tremor recorded at Mt. Erebus volcano, Antarctica." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/9p7293.

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碩士<br>國立中央大學<br>地球科學學系<br>106<br>Most phenomena in nature show a relationship between their numbers and their sizes. This relationship can be used to identify their source processes. In this respect, we investigate duration-amplitude distribution for 278 tremor events during May 2002-April 2004 recorded at Erebus volcano, Antarctica. We compute reduced displacement (

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Capítulos de libros sobre el tema "Tremor amplitude"

Rabelo, Amanda, João Paulo Folador, Ana Paula Bittar, Luiza Maire, Samila Costa, Alice Rueda, S. Krishnan, Viviane Lima, Rodrigo M. A. Almeida, and Adriano O. Andrade. "Low Amplitude Hand Rest Tremor Assessment in Parkinson’s Disease Based on Linear and Nonlinear Methods." In XXVII Brazilian Congress on Biomedical Engineering, 301–6. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-70601-2_46.

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Šilený, Jan. "The Mechanism of Small Mining Tremors from Amplitude Inversion." In Seismicity in Mines, 309–24. Basel: Birkhäuser Basel, 1989. http://dx.doi.org/10.1007/978-3-0348-9270-4_4.

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Deuschl, G., J. Timmer, H. Genger, C. Gantert, C. H. Lücking, and J. Honerkamp. "Frequency, Amplitude, and Waveform Characteristics of Physiologic and Pathologic Tremors." In Instrumental Methods and Scoring in Extrapyramidal Disorders, 93–100. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-78914-4_9.

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Dik, Olga E., and Alexander D. Nozdrachev. "Chapter 6. Mechanisms of changes in dynamic complexity of involuntary oscillations of the human hand with movement disorders." In Mechanisms of changes in dynamical complexity of physiological signal patterns, 99–131. St. Petersburg State University, 2019. http://dx.doi.org/10.21638/11701/9785288059322.07.

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The sixth chapter examines the mechanisms of changes in the dynamic complexity of hand tremor with an increase in the degree of motor disorders. For this, multifractal and wavelet properties of involuntary oscillations that arise during the performance of certain motor tasks by a healthy person and a person with varying degrees of motor pathology are investigated. It was shown that clinical manifestations of pathological tremor correlate, firstly, with a significant increase in the global energy of the wavelet spectrum and, secondly, with a decrease in the width of the singularity spectrum. At the same time, an improvement in the functional state (a decrease in the amplitude of a pathological tremor) corresponds to a decrease in long-term correlations and an increase in the randomness of up-down patterns, which corresponds to a partial shift of the singularity spectrum into the range of values typical for a tremor of the hand of a healthy person. The mechanism for reducing the dynamic complexity of patterns of involuntary oscillations of the human hand with an increase in the degree of motor disorders is based on a decrease in the contribution of strong fluctuations, accompanied by the appearance of long-term correlations of sequential values of tremor. The considered features in changes in tremor patterns make it possible to quantify the degree of movement disorders and can be used to facilitate the differential diagnosis of the parkinsonian and essential tremor in complex clinical cases.

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Youssef, Paul E., Kenneth J. Mack, and Kelly D. Flemming. "Classification and Approach to Movement Disorders." In Mayo Clinic Neurology Board Review, edited by Kelly D. Flemming, 571–75. Oxford University Press, 2021. http://dx.doi.org/10.1093/med/9780197512166.003.0068.

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Movement disorders are conventionally divided into 2 major categories. Hyperkinetic movement disorders (also called dyskinesias) are excessive, often repetitive, involuntary movements that intrude into the normal flow of motor activity. This category includes chorea, dystonia, myoclonus, stereotypies, tics, and tremor. Hypokinetic movement disorders are akinesia (lack of movement), hypokinesia (reduced amplitude of movement), bradykinesia (slow movement), and rigidity. Parkinsonism is the most common hypokinetic movement disorder. In childhood, hyperkinetic disorders are common, whereas hypokinetic movement disorders are relatively uncommon.

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Ahlskog, J. Eric. "Which Drug for Parkinsonism? Walking, Stiffness, Tremor, and Slowness." In Dementia with Lewy Body and Parkinson's Disease Patients. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199977567.003.0011.

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In Chapters 1 and 4, we briefly summarized the symptoms of parkinsonism. Parkinsonism implies movement problems that are typical of Parkinson’s disease. They remain treatment issues during the lifetime of people with Parkinson’s disease, even if dementia develops. Similarly, parkinsonism also typically occurs in DLB, although to variable degrees. In these disorders parkinsonism primarily reflects low brain dopamine levels and improves with dopamine replacement therapy, often markedly. Parkinsonism occurs when a region of the brain called the basal ganglia ceases to work properly (see Figure 4.2 in Chapter 4). As discussed in Chapter 4, the substantia nigra is a crucial regulator of basal ganglia activity, which is mediated by dopamine release in the striatum. The substantia nigra degenerates in these Lewy disorders and, as a result, brain dopamine declines. With a decline in dopamine, movement slows. Bradykinesia is the medical term for such slowness. This manifests as not only slowed movement but also less movement and smaller than normal movements. Unconscious automatic movements, such as blinking or arm swing, diminish. A unique tremor of the hands (sometimes legs) often develops when these limbs are in a relaxed position (rest tremor). For unknown reasons, the brain is not affected symmetrically, hence, neither is the body. Typically, one side of the body is much more impaired than the other. The extent to which these symptoms develop differs from person to person and includes various combinations of the following components. The slowness may be apparent on one or both sides of the body. For example, one leg may lag behind when walking. The overall appearance is characterized by moving much slower than expected for one’s age. The person feels as if they are moving in molasses—everything slows down. Many of our daily activities involve repeated small movements, such as writing or brushing teeth. In the Lewy conditions of DLB and PDD, the size (amplitude) of repetitive movements diminishes, impairing the activity. This is exemplified by the small handwriting of someone with parkinsonism, termed micrographia. Clinicians assess repetitive motor function by asking the patient to repetitively tap the thumb and index finger.

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Miocinovic, Svjetlana, Pravin Khemani, Rebecca Whiddon, and Shilpa Chitnis. "Improved Outcome on Interleaved Deep Brain Stimulation Settings." In Deep Brain Stimulation, edited by Laura S. Surillo Dahdah, Padraig O’Suilleabhain, Hrishikesh Dadhich, Mazen Elkurd, Shilpa Chitnis, and Richard B. Dewey, 155–60. Oxford University Press, 2020. http://dx.doi.org/10.1093/med/9780190647209.003.0032.

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Interleaving is a DBS programming method whereby two sets of stimulation parameters are applied interchangeably (on a millisecond level). This chapter describes a patient with Parkinson disease who was implanted with subthalamic nucleus deep brain stimulation but achieved suboptimal tremor control with conventional programming (monopolar, double monopolar, or bipolar settings). Interleaving allowed the dorsal contact to be set to a higher setting, while the contact below was set to a tolerable lower setting. Together, the two contacts provided complete tremor resolution without side effects. It is unknown whether interleaving provides any additional advantage over simply allowing use of different amplitudes at different contacts, but potential mechanisms are discussed.

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Actas de conferencias sobre el tema "Tremor amplitude"

Singh, S. P. N., and C. N. Riviere. "Physiological tremor amplitude during retinal microsurgery." In Proceedings of the IEEE 28th Annual Northeast Bioengineering Conference. IEEE, 2002. http://dx.doi.org/10.1109/nebc.2002.999520.

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Winston, Sam E., Riley C. Dehmer, and Timothy A. Doughty. "Parkinsons Disease: Tremor Suppression With Wearable Device." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-70910.

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Abstract Parkinson’s Disease (PD) is a neurodegenerative disorder that affects nearly a million people in the United States. Hand tremors are a well-known symptom associated with PD and result in anxiety, frustration, and malnutrition. While there is no cure, several approaches attempt to treat the symptoms. Many are invasive, including the use of pharmaceuticals and surgery [1]. Noninvasive technologies are often cumbersome and do not address the conspicuous nature experiencing tremors in public. This study is motivated by design criteria established from previous research [2], with a goal of

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Chanov, N. D., I. S. Antonov, and A. V. Li. "COMPARISON OF TREMOR AMPLITUDE IN PATIENTS WITH PARKINSON'S DISEASE BY SEX." In NOVEL TECHNOLOGIES IN MEDICINE, BIOLOGY, PHARMACOLOGY AND ECOLOGY. Institute of information technology, 2022. http://dx.doi.org/10.47501/978-5-6044060-2-1.383-384.

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In this article, a comparative characterization of tremor as a motor symptom in Parkinson's Disease is carried out in patients of different sexes using a non-invasive device, which allows you to objectively assess the amplitude of tremor and determine the presence of a statistically significant difference between the sexes.

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Taheri, Behzad, David Case, and Edmond Richer. "Theoretical Development and Experimental Validation of an Adaptive Controller for Tremor Suppression at Musculoskeletal Level." In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-3954.

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Tremor is a rhythmical and involuntary oscillatory movement of a body part. Mechanical loading via wearable exoskeletons is a non-invasive tremor suppression alternative to medical treatments. In this approach, the challenge is attenuating the tremor without affecting the patient’s intentional motion. An adaptive tremor suppression algorithm was designed to estimate and restrict motion within the tremor frequency band. An experimental setup was designed and developed to simulate the dynamics of a human arm joint with intentional and tremorous motion. The required orthotic suppressive force was

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Taheri, Behzad, David Case, and Edmond Richer. "Active Tremor Estimation and Suppression in Human Elbow Joint." In ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control. ASMEDC, 2011. http://dx.doi.org/10.1115/dscc2011-6185.

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A new control algorithm was developed for tremor estimation and suppression in a second order linear model of the human elbow joint. An adaptive method developed to estimate a simple harmonic disturbance was generalized for tremorous motion with spectral composition similar to the clinical reports for action tremor. Numerical simulations showed the ability of proposed controller to reduce tremor amplitude without generating significant resistance against voluntary motion of the arm. The designed algorithm can be used in an upper-limb orthosis to suppress debilitating tremorous motion of the ar

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Kim, Sang Kyong, Hyo Seon Jeon, Han Byul Kim, Ko Keun Kim, Beom Seok Jeon, and KwangSuk Park. "Changes in Bilateral Phase Synchronization in Parkinsonian Tremor Related to Amplitude Difference." In Biomedical Engineering. Calgary,AB,Canada: ACTAPRESS, 2013. http://dx.doi.org/10.2316/p.2013.791-159.

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Zamanian, Amir Hosein, and Edmond Richer. "Adaptive Disturbance Rejection Controller for Pathological Tremor Suppression With Permanent Magnet Linear Motor." In ASME 2017 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dscc2017-5151.

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This paper presents an adaptive disturbance rejection (ADR) controller developed for the suppression of the pathological tremor in the humans’ wrist. An experimental setup, based on a slotted permanent magnet linear motor (PMLM), was developed to evaluate the ADR’s performance in real-time suppression of the tremor signal recorded from Parkinson’s disease patients. A model-base compensator was utilized to minimize the resistive and cogging forces exhibited by the PMLM. Experimental results showed an average tremor amplitude suppression of 32.61 dB (97.6%) in the first, and 15.23 dB (82.7%) in

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Guerrera, Brittany, Samantha Farrow, Gloria Zeng, and Sally F. Shady. "Multiple Sclerosis Symptom Analyzer." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66217.

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Multiple Sclerosis (MS) is a chronic neurodegenerative disease of the central nervous system. MS is typically diagnosed between the ages of 20 and 40. There is no known cause of the disease and each individual experiences varying signs and symptoms depending on the severity of their disease. The most common symptoms include tremor, debilitated gait, visual impairment, or cognitive and emotional disturbances. Current methods used to treat MS include oral medication and surgical treatment. The issues with oral medication are the unwanted side effects to otherwise healthy tissue and the lack of p

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Filpo, Alessandra, Caio Disserol, Bernardo Corrêa de Almeida Teixeira, Kenzo Hokazono, and Hélio A. G. Teive. "An Unexpected Smile: risus sardonicus and wing-beating tremor in a first office visit." In XIII Congresso Paulista de Neurologia. Zeppelini Editorial e Comunicação, 2021. http://dx.doi.org/10.5327/1516-3180.505.

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Context: We present a noteworthy reminder of Wilson disease’s classical manifestations, which may become rarer in clinical practice as availability of genetic tests increases, allowing timely diagnosis and treatment. Case report: A 29 year-old woman developed progressive and asymmetric upper limb tremor and dystonia over 1 year, along with speech and feeding impairment in the last two weeks. Examination revealed segmental dystonia with risus sardonicus, open-jaw oromandibular and severe left arm dystonia, along with wing-beating tremor. Bilateral Kayser-Fleischer ring, low serum ceruloplasmin

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Thelen, Matthew, Fardeen Mazumder, Linda Zhu, Charlotte Tang, and Nathaniel S. Miller. "Reliability Test of Mobile Embedded Accelerometers in Measuring Postural Stability for People With Parkinson’s Disease." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-94806.

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Abstract Parkinson’s Disease (PD) is the second most common neurodegenerative disease in the United States, affecting at least one million people. The cardinal symptoms of PD are tremor, rigidity, slowed movement, and impaired balance. While some symptoms of PD are responsive to anti-PD medications, other symptoms, are less medication responsive, especially walking and balance. Moreover, daily activities, such as writing, using tools, and walking, affect the quality of life (QoL) of people with PD (PwPD). Monitoring PD symptoms is essential for clinical evaluations and adjusting medication to

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