diff --git a/hbp_nrp_virtual_coach/hbp_nrp_virtual_coach/simulation.py b/hbp_nrp_virtual_coach/hbp_nrp_virtual_coach/simulation.py
index 85a57d56aa74682207344a722f8fe3e35726ed0d..ddf39567e1b9a604731699577a191cdc810397f9 100644
--- a/hbp_nrp_virtual_coach/hbp_nrp_virtual_coach/simulation.py
+++ b/hbp_nrp_virtual_coach/hbp_nrp_virtual_coach/simulation.py
@@ -592,7 +592,7 @@ class Simulation(object):
 
         self.save_transfer_functions()
         self.__save_experiment_data('brain', {'data': pynn_script,
-                                              'additional_populations': populations})
+                                              'brain_populations': populations})
 
     def save_csv(self):
         """
@@ -689,7 +689,7 @@ class Simulation(object):
 
         # change_population is set to 2, which means proceed with no replace_population action
         body = {'data': brain_script, 'data_type': old_data_type, 'brain_type': old_brain_type,
-                'additional_populations': neural_population, 'change_population': change_population}
+                'brain_populations': neural_population, 'change_population': change_population}
 
         url = '%s/%s' % (self.__sim_url, self.__config['simulation-scripts']['brain'])
 
@@ -709,7 +709,7 @@ class Simulation(object):
             self.__logger.info(err)
             self.__logger.info('Attempting to restore the old Brain.')
             body['data'] = old_brain
-            body['additional_populations'] = old_populations
+            body['brain_populations'] = old_populations
 
             status_code, _ = self.__http_client.put(url, body=json.dumps(body))
             if status_code != httplib.OK:
@@ -742,7 +742,7 @@ class Simulation(object):
         Gets the Neuron populations defined within the brain as a dictionary indexed by population
         names.
         """
-        return self.__get_simulation_scripts('brain')['additional_populations']
+        return self.__get_simulation_scripts('brain')['brain_populations']
 
     def edit_populations(self, populations):
         """
diff --git a/hbp_nrp_virtual_coach/hbp_nrp_virtual_coach/tests/test_simulation.py b/hbp_nrp_virtual_coach/hbp_nrp_virtual_coach/tests/test_simulation.py
index 0314d0d34d3c72fd9d155fb54e1395229312bc7b..911c4edcb26fb0c272fd5a1d8d58499186d32249 100644
--- a/hbp_nrp_virtual_coach/hbp_nrp_virtual_coach/tests/test_simulation.py
+++ b/hbp_nrp_virtual_coach/hbp_nrp_virtual_coach/tests/test_simulation.py
@@ -369,7 +369,7 @@ class TestSimulation(unittest.TestCase):
     def test_get_brain_and_populations(self):
         self._sim._Simulation__get_simulation_scripts = Mock()
         self._sim._Simulation__get_simulation_scripts.return_value = {'data': 'foo',
-                                                                'additional_populations': 'bar'}
+                                                                'brain_populations': 'bar'}
         self._sim.get_populations()
         self._sim._Simulation__get_simulation_scripts.assert_called_once()
         self._sim._Simulation__get_simulation_scripts.assert_called_with('brain')
@@ -483,7 +483,7 @@ class TestSimulation(unittest.TestCase):
         self._sim.save_brain()
         self._sim._Simulation__http_client.put.assert_called_once_with(
             '%s/experiment/%s/brain' % (serverurl, exp_id),
-            body={'additional_populations': populations,'data': 'some brain code'})
+            body={'brain_populations': populations,'data': 'some brain code'})
 
         self._sim._Simulation__http_client.post = Mock(return_value=(httplib.OK, None))
         self._sim.save_world()