<p>A system for monitoring brain activity in a mobile animal or human subject is disclosed which comprises a first device adapted for attaching fiber optical cables to the head of a subject. A second device is detachably coupled to the first device and holds the fiber optical cables. The fiber optic cables provide a communicating light path between a tomographic imaging device and the brain of the subject when the second device is plugged into the first device in a manner equivalent to plugging a male connector into a female connector.</p>
