00:03have you ever wondered how fish actually know where they're going between murky waters and
00:07flowing currents it's amazing that they have any idea how to stay in their feeding areas or get
00:11back home after being swept away and now scientists think they might know how researchers say the key
00:16is a chemical pathway in their brains a neural circuit that evolved some 500 million years ago
00:21that they share with humans when they observed fish navigating in a lab setting when pushed
00:26off course by currents they would always return to their starting position retracing their steps so
00:31researchers used brain imaging techniques to look at the mechanisms of how they were doing this
00:35expecting to see activity in the brain's spatial mapping areas but instead they discovered a new
00:40neural circuit one they say must tell the fish it's going the wrong way with the researchers writing
00:45quote we found the fish is trying to calculate the difference between its current location and its
00:49preferred location and uses this difference to generate an error signal adding that the fish's
00:53brain then sends those error signals to its motor control centers forcing it to correct itself
00:58even long after being pushed off course a mechanism they say is worth investigating as we share many
01:03cognitive similarities with fish meaning this discovery could one day be used to treat cognitive issues
01:08in humans even diseases like alzheimer's
