Resilient head mounted device for neurostimulation and sensing of body parameters

A headset comprising:

• an elongate body member configured to fully encircle the a head of a user, said elongate body member having a monolithic structure and having a rest state and a closed state and comprising:
• (i) an anterior section;
• and
• (ii) a pair of arm sections configured to be positioned above the user's ears, each arm section being flexible and resilient, and extending away from said anterior section and terminating in a posterior section which terminates in a posterior end;
• at least one size-adjustment mechanism configured to enable adjustment of the circumference of said body member to comfortably fit circumferentially about heads having different circumferences, at different times:
• a closure mechanism associated with said posterior ends of said arm sections, said closure mechanism having an open position and a closed position, wherein, when said closure mechanism is in said closed position, said body member is in said closed state whereby said headset is fully circumferential;
• and
• a processing unit,
• a pair of posterior electrodes configured to be positioned against the skin of the head of said user, each mounted on an inner surface of one of said posterior sections, each posterior electrode of said pair being adapted to electrically communicate with the processing unit,
• wherein, in said closed state of said headset, a distance between said posterior electrodes is fixed regardless of an adjusted size of said headset,
• wherein the headset is configured, when said headset is donned on the head of the user, to urge said posterior electrodes to be positioned against the skin of the head of said user,
• wherein said arm sections have a predefined preload such that when said arm sections are outwardly displaced, said preload drives said arm members toward each other, and
• wherein, following placement of said posterior ends above the user's ears, while said headset is pushed rearwardly, said posterior ends are configured to apply a force to the head such that said posterior ends continuously engage the head.