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Prosodic Preferences of Surface Electromyography-based Subvocal Speech for People With Laryngectomy.
J Voice
December 2024
Delsys, Inc., Natick, Massachusetts 01760; Altec, Inc., Natick, Massachusetts 01760; Department of Speech, Language and Hearing Sciences, Boston University, Boston, Massachusetts 02215. Electronic address:
Introduction: People who undergo a total laryngectomy lose their natural voice and depend on alaryngeal technologies for communication. However, these technologies are often difficult to use and lack prosody. Surface electromyographic-based silent speech interfaces are novel communication systems that overcome many of the shortcomings of traditional alaryngeal speech and have the potential to seamlessly incorporate individualized prosody.
View Article and Find Full Text PDFNeuromuscular characteristics of eccentric, concentric and isometric contractions of the knee extensors.
Eur J Appl Physiol
October 2024
School of Medical and Health Sciences, Centre for Human Performance, Edith Cowan University, Joondalup, Australia.
Purpose: We compared voluntary drive and corticospinal responses during eccentric (ECC), isometric (ISOM) and concentric (CON) muscle contractions to shed light on neurophysiological mechanisms underpinning the lower voluntary drive in a greater force production in ECC than other contractions.
Methods: Sixteen participants (20-33 years) performed ISOM and isokinetic (30°/s) CON and ECC knee extensor contractions (110°-40° knee flexion) in which electromyographic activity (EMG) was recorded from vastus lateralis. Voluntary activation (VA) was measured during ISOM, CON and ECC maximal voluntary contractions (MVCs).
Central and peripheral neuromuscular fatigue following ramp and rapid maximal voluntary isometric contractions.
Front Physiol
August 2024
dNea Onnim Consultancy, StAugustine, FL, United States.
Introduction: Maximal voluntary isometric contractions (MVICs) as a fatiguing modality have been widely studied, but little attention has been given to the influence of the rate of torque development. Given the established differences in motor command and neuromuscular activation between ramp and rapid MIVCs, it is likely performance fatigue differs as well as the underlying physiological mechanisms.
Purpose: To compare responses for rapid and maximal torque following ramp and rapid MVICs, and the corresponding neuromuscular and corticospinal alterations.
Hemimasticatory spasm: a series of 17 cases and a comprehensive review of the literature.
Front Neurol
March 2024
Department of Oral and Maxillofacial Surgery, National Hospital Organization, Kyoto Medical Center, Kyoto, Japan.
Hemimasticatory spasm (HMS) is a rare movement disorder characterized by paroxysmal spasms or twitches of the unilateral jaw-closing muscles. This study aimed to comprehensively evaluate the clinical features of patients with HMS. Data from 17 patients newly diagnosed with HMS (12 females and 5 males; mean age at onset: 46.
View Article and Find Full Text PDFA neurophysiological approach to mirror movements in amyotrophic lateral sclerosis.
Clin Neurophysiol
February 2024
Instituto de Fisiologia, Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal; Department of Neurosciences and Mental Health, Centro Hospitalar Universitário de Lisboa Norte, Lisbon, Portugal.
Objective: To investigate mirror activity in amyotrophic lateral sclerosis (ALS) patients, using a simple paradigm of signal quantification.
Methods: Patients were asked to perform a brief isometric maximum contraction of the abductor digiti minimi (ADM) or tibialis anterior (TA) on one side, while relaxing the contralateral side of the body. Both sides were investigated.
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