A system for monitoring a condition in a subject, the system comprising: at least one processor; a cardiac rhythm management containing a subject monitor application comprising a plurality of modules executable on the at least one processor, the plurality of modules comprising: a neural signal acquisition module for obtaining one or more neural signals in one or more upper airway afferents of the subject; a neural activity profile module for processing each of the one or more neural signals to obtain at least one neural activity profile, each neural activity profile characterized by at least one of: a neural signal timing, a neural signal amplitude, a neural signal phase, a neural signal position, a neural signal conduction velocity, and any combination thereof; an activity type module for comparing each of the at least one neural activity profiles to one or more activity criteria to associate each neural activity profile with an associated activity type chosen from a respiratory activity type, a deglutition activity type, a vibration activity type, a reflux activity type, and any combination thereof; an activity state module for processing each of the at least one neural activity profiles to determine an activity state characterizing the associated activity type, the activity state comprising: a respiratory state comprising respiratory timing, respiratory amplitude, respiratory phase, respiratory location, and any combination thereof; a deglutition state comprising solid contact, fluid contact, contact velocity, contact timing, contact amplitude, contact pressure, contact texture, contact temperature, a presence of a bolus, and any combination thereof; a vibration state comprising vibration timing, vibration amplitude, vibration phase, vibration location, vibration pattern, and any combination thereof; and a reflux state comprising reflux timing, reflux pH, reflux location, and any combination thereof; and a graphical user interface module for generating one or more forms used to receive inputs to the system and to deliver output from the system. at least one processor; a cardiac rhythm management containing a subject monitor application comprising a plurality of modules executable on the at least one processor, the plurality of modules comprising: a neural signal acquisition module for obtaining one or more neural signals in one or more upper airway afferents of the subject; a neural activity profile module for processing each of the one or more neural signals to obtain at least one neural activity profile, each neural activity profile characterized by at least one of: a neural signal timing, a neural signal amplitude, a neural signal phase, a neural signal position, a neural signal conduction velocity, and any combination thereof; an activity type module for comparing each of the at least one neural activity profiles to one or more activity criteria to associate each neural activity profile with an associated activity type chosen from a respiratory activity type, a deglutition activity type, a vibration activity type, a reflux activity type, and any combination thereof; a neural signal acquisition module for obtaining one or more neural signals in one or more upper airway afferents of the subject; a neural activity profile module for processing each of the one or more neural signals to obtain at least one neural activity profile, each neural activity profile characterized by at least one of: a neural signal timing, a neural signal amplitude, a neural signal phase, a neural signal position, a neural signal conduction velocity, and any combination thereof; an activity type module for comparing each of the at least one neural activity profiles to one or more activity criteria to associate each neural activity profile with an associated activity type chosen from a respiratory activity type, a deglutition activity type, a vibration activity type, a reflux activity type, and any combination thereof; an activity state module for processing each of the at least one neural activity profiles to determine an activity state characterizing the associated activity type, the activity state comprising: a respiratory state comprising respiratory timing, respiratory amplitude, respiratory phase, respiratory location, and any combination thereof; a deglutition state comprising solid contact, fluid contact, contact velocity, contact timing, contact amplitude, contact pressure, contact texture, contact temperature, a presence of a bolus, and any combination thereof; a vibration state comprising vibration timing, vibration amplitude, vibration phase, vibration location, vibration pattern, and any combination thereof; and a reflux state comprising reflux timing, reflux pH, reflux location, and any combination thereof; and a graphical user interface module for generating one or more forms used to receive inputs to the system and to deliver output from the system. a respiratory state comprising respiratory timing, respiratory amplitude, respiratory phase, respiratory location, and any combination thereof; a deglutition state comprising solid contact, fluid contact, contact velocity, contact timing, contact amplitude, contact pressure, contact texture, contact temperature, a presence of a bolus, and any combination thereof; a vibration state comprising vibration timing, vibration amplitude, vibration phase, vibration location, vibration pattern, and any combination thereof; and a reflux state comprising reflux timing, reflux pH, reflux location, and any combination thereof; and a graphical user interface module for generating one or more forms used to receive inputs to the system and to deliver output from the system.