Implantable mental state monitor

A medical system comprising:

• an insertable cardiac monitor comprising:
• a housing configured for subcutaneous implantation in a subject, the housing having a length between 40 millimeters (mm) and 60 mm between a first end and a second end, a width less than the length, and a depth less than the width;
• a first electrode at or proximate to the first end;
• a second electrode at or proximate to the second end;
• sensing circuitry within the housing, the sensing circuitry configured to continuously sense a plurality of physiological signals including an at least an electrocardiogram of the subject via the first electrode and the second of electrode;
• a memory within the housing;
• and
• first processing circuitry within the housing, the first processing circuitry configured to collect parameter data of the subject based on the sensed physiological signals;
• and
• one or more computing devices in communication with the insertable cardiac monitor, the one or more computing devices comprising second processing circuitry configured to determine a mental state of the subject based on at least one of the sensed physiological signals or the parameter data.

A method for operating a system comprising one or more implantable monitoring devices to determine a mental state of a subject, wherein at least one implantable monitoring device of the one or more implantable monitoring devices comprises a housing configured for subcutaneous implantation in the subject and a plurality of electrodes positioned on the housing, wherein the at least one implantable monitoring device is configured to continuously sense at least one physiological signal of the plurality of physiological signals via the plurality of electrodes, the method comprising:

• continuously sensing, by the one or more implantable monitoring devices, a plurality of physiological signals of the subject;
• collecting, by the one or more implantable monitoring devices, parameter data of the subject based on the sensed physiological signals;
• and
• determining, by processing circuitry, a mental state of the subject based on at least one of the sensed physiological signals or the parameter data, wherein the processing circuitry comprises processing circuitry of one or more of:
• the at least one implantable monitoring device;
• one or more computing devices configured to wirelessly communicate with the one or more implantable monitoring devices;
• or
• a cloud computing system configured to communicate with at least one of the one or more implantable monitoring devices or the one or more computing devices.