Adaptive deep brain stimulation using frequency sub-bands

An implantable medical device (IMD) comprising:

• one or more electrodes;
• stimulation generation circuitry;
• and
• processing circuitry configured to:
• control the stimulation generation circuitry to deliver electrical stimulation therapy to a tissue of a patient via the one or more electrodes;
• and
• adjust a level of at least one parameter defining the electrical stimulation therapy such that:
• a first value of a first sensed signal indicative of a first neurological signal of the patient is not less than a first lower bound and not greater than a first upper bound, wherein the first neurological signal comprises a first frequency within a frequency band of a plurality of frequency bands;
• and
• a second value of a second sensed signal indicative of a second neurological signal of the patient is not less than a second lower bound and not greater than a second upper bound, wherein the second neurological signal comprises a second frequency within the frequency band of the plurality of frequency bands, and wherein the second frequency is different from the first frequency.

A system comprising:

• processing circuitry;
• and
• an implantable medical device (IMD) comprising:
• one or more electrodes;
• and
• stimulation generation circuitry configured to deliver electrical stimulation therapy to a tissue of a patient via the one or more electrodes,
• wherein the processing circuitry is configured to adjust a level of at least one parameter defining the electrical stimulation therapy such that:
• a first value of a first sensed signal indicative of a first neurological signal of the patient is not less than a first lower bound and not greater than a first upper bound, wherein the first neurological signal comprises a first frequency within a frequency band of a plurality of frequency bands;
• and
• a second value of a second sensed signal indicative of a second neurological signal of the patient is not less than a second lower bound and not greater than a second upper bound, wherein the second neurological signal comprises a second frequency within the frequency band of the plurality of frequency bands, and wherein the second frequency is different from the first frequency.