title: Electromyography and mechanomyography of elbow agonists and antagonists in Parkinson disease.
abstract: The purpose of this study was to assess the electromyographic (EMG) and mechanomyographic (MMG) activities of agonist and antagonist muscles in Parkinson disease patients during maximal isometric elbow contraction in flexion and extension. Ten elderly females with Parkinson disease (average age 75 years) and 10 age-matched healthy females were tested. The torque and the EMG and MMG signals from biceps brachii and triceps brachii were recorded during sustained maximal voluntary isometric contraction of the elbow flexors and extensors. There were no intergroup differences in the EMG and MMG activities of agonist and antagonist muscles or in torque. This might be because the Parkinson subjects were tested during their medication "ON" phase, or perhaps maximal isometric contraction (MVC) induced greater active muscle stiffness that affected the MMG signal. Muscle Nerve 40: 240-248, 2009.
authors.affiliation: Department of Kinesiology, Faculty of Physiotherapy, University School of Physical Education, Al. Paderewskiego 35, Building P4, Wroclaw 51-612, Poland.
authors.forename: Jarosław
authors.initials: J
authors.lastname: Marusiak
authors.forename: Anna
authors.initials: A
authors.lastname: Jaskólska
authors.forename: Ewa
authors.initials: E
authors.lastname: Jarocka
authors.forename: Wojciech
authors.initials: W
authors.lastname: Najwer
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Kisiel-Sajewicz
authors.forename: Artur
authors.initials: A
authors.lastname: Jaskólski
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D001696:Biomechanical Phenomena; D004550:Elbow / Q000294:innervation / Q000503:physiopathology*; D005260:Female; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology*; D018763:Muscle Fatigue; D018482:Muscle, Skeletal / Q000503:physiopathology*; D009142:Musculoskeletal Physiological Phenomena; D009213:Myography / Q000145:classification / Q000295:instrumentation / Q000379:methods; D010300:Parkinson Disease / Q000473:pathology / Q000503:physiopathology*; D019415:Torque