A sleep disordered breathing care device comprising: an implantable first sensor comprising an accelerometer (2026, 2526) to sense physiologic information to determine a sleep-wake status via the sensed physiologic information; wherein the SDB care device is to: automatically take an action when at least one of: a probability of sleep, according to the sleep-wake status determination, exceeds a sleep-detection threshold; or a probability of wakefulness, according to the sleep-wake status determination, exceeds a wake-detection threshold, wherein the automatically taking an action comprises at least one of automatically starting a stimulation treatment period and automatically stopping the stimulation treatment period, wherein the device is to: receive input to electively start a treatment period and/or to electively stop a treatment period; and upon reception of input to electively start, suspend the automatically start and upon reception of input to electively stop, suspending the automatically terminating; and wherein the SBD care device is characterized in that it comprises a graphical user interface to display a plurality of separate nightly utilization periods, each which symbolically illustrate with respect to a treatment period within each nightly utilization period at least one of: an automatic start; an automatic stop; an elective start; and an elective stop. an implantable first sensor comprising an accelerometer (2026, 2526) to sense physiologic information to determine a sleep-wake status via the sensed physiologic information; wherein the SDB care device is to: automatically take an action when at least one of: a probability of sleep, according to the sleep-wake status determination, exceeds a sleep-detection threshold; or a probability of wakefulness, according to the sleep-wake status determination, exceeds a wake-detection threshold, wherein the automatically taking an action comprises at least one of automatically starting a stimulation treatment period and automatically stopping the stimulation treatment period, wherein the device is to: receive input to electively start a treatment period and/or to electively stop a treatment period; and upon reception of input to electively start, suspend the automatically start and upon reception of input to electively stop, suspending the automatically terminating; and wherein the SBD care device is characterized in that it comprises a graphical user interface to display a plurality of separate nightly utilization periods, each which symbolically illustrate with respect to a treatment period within each nightly utilization period at least one of: an automatic start; an automatic stop; an elective start; and an elective stop. a probability of sleep, according to the sleep-wake status determination, exceeds a sleep-detection threshold; or a probability of wakefulness, according to the sleep-wake status determination, exceeds a wake-detection threshold, wherein the automatically taking an action comprises at least one of automatically starting a stimulation treatment period and automatically stopping the stimulation treatment period, wherein the device is to: receive input to electively start a treatment period and/or to electively stop a treatment period; and upon reception of input to electively start, suspend the automatically start and upon reception of input to electively stop, suspending the automatically terminating; and wherein the SBD care device is characterized in that it comprises a graphical user interface to display a plurality of separate nightly utilization periods, each which symbolically illustrate with respect to a treatment period within each nightly utilization period at least one of: an automatic start; an automatic stop; an elective start; and an elective stop. receive input to electively start a treatment period and/or to electively stop a treatment period; and upon reception of input to electively start, suspend the automatically start and upon reception of input to electively stop, suspending the automatically terminating; and wherein the SBD care device is characterized in that it comprises a graphical user interface to display a plurality of separate nightly utilization periods, each which symbolically illustrate with respect to a treatment period within each nightly utilization period at least one of: an automatic start; an automatic stop; an elective start; and an elective stop. an automatic start; an automatic stop; an elective start; and an elective stop.