In various method embodiments, a neural activity signal is sensed, a feature from the sensed neural activity signal is extracted, and a neural marker for the extracted feature is created. User profiles or other criteria can be employed in order to facilitate matching candidates. The objective-engaging structure and the microscope-engaging structure, when mounted to the support structure, are characterized by respective axes that are non-collinear, and the reflecting element is positioned and oriented so that light incident along the objective-engaging structure’s axis is reflected to travel along the microscope-engaging structure’s axis. A food pusher is slidably receivable within the interior channel of the chute and is movable between a disengaged position, wherein the food pusher is not engaged with the chute and the interior channel remains unrestricted and continuously open between the upper end and the base end, and an engaged position, wherein the food pusher is slidably received within the interior channel of the chute.