Multi-function apparatus, systems and methods for receiving signals from a human subject's head

A method of receiving electroencephalographic (EEG) signals from a human subject's head and taking one or more photoplethysmograms (PPG) of the subject, the subject having at least one ear, each at least one ear having an earlobe with blood vessels passing therethrough and from which the subject's pulse may be detected, the method comprising:

• placing a removable headset onto the subject's head so that the headset will extend at least partially around the subject's head over at least part of the subject's scalp, the headset including a plurality of EEG electrodes;
• at least one non-conductive electrode biasing flap biasing at least one EEG electrode between the headset and the subject's head;
• at least one EEG electrode facilitating the transmission of one or more electrical EEG signals from the subject's head to at least one electrical signal transmission wire of the headset;
• releasably clamping an ear clip to one of the subject's earlobes;
• and
• the ear clip taking one or more photoplethysmograms (PPG) measurements of the subject.

A system for use in connection with receiving electroencephalographic (EEG) signals from a human subject's head through the scalp thereof, the subject having at least one ear, each at least one ear having an earlobe with blood vessels passing therethrough and from which the subject's pulse may be detected, the system comprising:

• a removable headset arranged and adapted to extend at least partially around the subject's head over at least part of the subject's scalp;
• a plurality of removable EEG electrodes releasably engageable with said headset and, during use of said headset, extending between said headset and the subject's scalp and being electrically coupled to said headset;
• at least one electrode biasing flap constructed at least partially of flexible material and associated with at least one said EEG electrode, wherein electric signals are not transmittable though each said electrode biasing flap;
• and
• at least one ear clip releasably engageable with one of the subject's earlobes, and including an at least partially metallic EEG reference electrode electrically coupled to said headset during use of said at least one ear clip.

A system for use in connection with receiving electroencephalographic (EEG) signals from a human subject's head, the subject having at least one ear, each at least one ear having an earlobe with blood vessels passing therethrough and from which the subject's pulse may be detected, the system comprising:

• a removable headset arranged and adapted to extend at least partially around the subject's head over at least part of the subject's scalp, said headset including at least one electrical signal transmission wire;
• a plurality of removable EEG electrodes releasably engageable with said headset and, during use of said headset, extending between said headset and the subject's scalp and being electrically coupled to at least one said electrical signal transmission wire;
• a plurality of non-conductive electrode biasing flaps, each said electrode biasing flap being separate and distinct from, and releasably engageable with, said headset, wherein each said biasing flap is associated with at least one of said EEG electrodes;
• and
• at least one ear clip electrically coupled to at least one said electrical signal transmission wire of said headset and releasably engaged with one of the subject's earlobes to serve as an EEG reference electrode as desired during use of said at least one ear clip.

A system for use in connection with receiving electroencephalographic (EEG) signals from a human subject's head, the subject having at least one ear, the system comprising:

• a removable headset arranged and adapted to extend at least partially around the subject's head over at least part of the subject's scalp;
• a plurality of removable EEG electrodes releasably engageable with said headset and, during use of said headset, extending between said headset and the subject's scalp and being electrically coupled to said headset;
• a plurality of non-conductive electrode biasing flaps, each said electrode biasing flap being associated with at least one said EEG electrode and directly releasably engaged with said headset separate from said at least one associated EEG electrode;
• and
• at least one ear clip electrically coupled to said headset and releasably engaged with one of the subject's ears to receive electrical signals directed through or received from the earlobe during use of said at least one ear clip.