title: Patterns of gamma-motoneuron activity in the external intercostal muscles of the cat during respiration.
abstract: Recordings of gamma-motoneurons from fine filaments of external intercostal nerves were made during spontaneous breathing in the anesthetized cat. The patterns of alpha- and gamma-motoneuron activity varied within different areas of the rib cage. Areas of muscle which were recruited during inspiration received input from both tonically and phasically active gamma-motoneurons. Those areas of the rib cage which were not recruited during inspiration received activity from tonically active gamma-motoneurons. These patterns of gamma-motoneuron activity are in agreement with those suggested from previous recordings of muscle spindle activity.
authors.affiliation: Department of Physiology, University of Alberta, Edmonton, Canada.
authors.forename: J J
authors.initials: JJ
authors.lastname: Greer
authors.forename: R B
authors.initials: RB
authors.lastname: Stein
mesh_terms: D015763:2-Amino-5-phosphonovalerate; D000818:Animals; D002415:Cats / Q000502:physiology*; D004576:Electromyography; D009046:Motor Neurons / Q000502:physiology*; D012119:Respiration; D012132:Respiratory Muscles / Q000294:innervation* / Q000502:physiology; D014633:Valine / Q000031:analogs & derivatives / Q000494:pharmacology
chemical_list: D015763:2-Amino-5-phosphonovalerate; D014633:Valine