{"id_concept_class": "", "creation_time": 1512660601241, "event_stamp": "2017-01-06T17:33:49", "def_id_user": "usr_583366685f18a", "def_event_stamp": "2017-01-06T17:33:49", "last_updated": 1512660601241, "def_id": "def_586fd4fd98763", "name": "horizontal checkerboard", "alias": "", "definition_text": "The subject views a flashing checkerboard with a horizontal elongated shape. As a simplified retinotopic mapping procedure, this provides a rough definition of the boundary between some visual areas, e.g. V2 and V3. This is often used in conjunction and contrasted with vertical checkerboards. ", "id_user": "usr_583366685f18a", "id": "trm_586fd4fd8754a", "type": "task", "conditions": [], "concepts": [], "indicators": [], "external_datasets": [], "implementations": [], "citation": [], "contrasts": [], "batteries": [], "disorders": []}