Motor unit recruitment in human genioglossus muscle in response to hypercapnia

Christian L Nicholas, Bei Bei, Christopher John Worsnop, Atul Malhotra, Amy Jordan, Julian P Saboisky, Julia K M Chan, Ella Louise Duckworth, David P White, John A Trinder

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33 Citations (Scopus)


Single motor unit recordings of the genioglossus (GG) muscle indicate that GG motor units have a variety of discharge patterns, including units that have higher discharge rates during inspiration (inspiratory phasic and inspiratory tonic), or expiration (expiratory phasic and expiratory tonic), or do not modify their rate with respiration (tonic). Previous studies have shown that an increase in GG muscle activity is a consequence of increased activity in inspiratory units. However, there are differences between studies as to whether this increase is primarily due to recruitment of new motor units (motor unit recruitment) or to increased discharge rate of already active units (rate coding).
Original languageEnglish
Pages (from-to)1529 - 1538
Number of pages10
Issue number11
Publication statusPublished - 2010
Externally publishedYes

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