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Spontaneous electromyographic activity of the tongue in amyotrophic lateral sclerosis
Authors:Hatice Tankisi MD  PhD    Marit Otto MD  PhD    Kirsten Pugdahl MSc  PhD  Anders Fuglsang‐Frederiksen MD  DMSc
Institution:Department of Neurophysiology, Aarhus University Hospital, , Aarhus C, Denmark
Abstract:Introduction: Detection of denervation in muscles in the craniobulbar area is important to assure widespread lower motor neuron involvement in the diagnosis of amyotrophic lateral sclerosis (ALS). The value of spontaneous activity analysis in needle electromyography (EMG) of the tongue has been questioned in the recent literature. Methods: Spontaneous activity in the tongue and sternocleidomastoid (SCM) muscles was reviewed retrospectively in 17 ALS patients. Results: Needle EMG showed spontaneous activity in the tongue in 14 of 17 patients (82%) and in 6 patients of 17 (35%) in SCM. Spontaneous EMG activity in the tongue was found in patients with and without bulbar symptoms. Conclusions: Needle EMG is a valuable method for assessing clinical and subclinical involvement of the tongue in patients with bulbar and limb onset ALS. Adequate relaxation of the tongue is a prerequisite for proper spontaneous activity recording. Muscle Nerve, 48: 296–298, 2013
Keywords:amyotrophic lateral sclerosis  bulbar muscles  electromyography  spontaneous activity  tongue
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