<Tr> <Td_colspan="2"> Section through superior colliculus showing Substantia nigra . </Td> </Tr> <Tr> <Th_colspan="2"> Details </Th> </Tr> <Tr> <Th> Part of </Th> <Td> Midbrain, Basal ganglia </Td> </Tr> <Tr> <Th_colspan="2"> Identifiers </Th> </Tr>

In a healthy individual dopamine secreting neurons of the substantia nigra