Multimodal brain sensing lead

An implantable medical lead for use with a host device configured to output host control signals, provide a host power supply, receive a first measurement, and receive unprocessed signals for processing by the host device to obtain a second measurement corresponding to a neuronal field potential measurement or a rheoncephalography measurement, the lead comprising:

• a body having a distal portion and a proximal portion;
• a plurality of lead components at the distal portion, wherein the plurality of lead components includes a plurality of macroelectrodes, a plurality of microelectrodes, and at least one optical assembly;
• an electronics module comprising a lead signal processor comprising an amplifier and an analog-to-digital converter, the lead signal processor configured to process signals from one or more of the plurality of lead components to obtain one of a plurality of different types of first measurements corresponding to a single unit activity measurement, a multi unit activity measurement, or an optical measurement;
• and
• a connector at the proximal portion of the body, the connector configured to provide an electrical interface between the host device and the electronics module,
• wherein the electronics module is configured to selectively enable, based on the host control signals:
• a) a first sensing modality that provides one of the different types of first measurements by:
• electrically coupling at least one of the plurality of lead components to an input to the lead signal processor, and
• electrically coupling an output of the lead signal processor to the connector, and
• b) a second sensing modality that provides one or more unprocessed signals by electrically coupling at least one of the plurality of lead components to the connector while bypassing the lead signal processor.