Fig. 6

Higher incidence, rate and area of spfps_-nmda in VH compared with DH. a Simultaneous recordings of spfps_-nmda from the CA1 stratum radiatum of a DH and a VH slice taken from the same animal and bathed in 50 μM PTX and 20 μM CNQX. One minute-long records (traces on the left) and single events (traces on the right) are shown. Note that spfps_-nmda was larger and occurred at a higher rate in VH compared with the DH slice. b The incidence, rate and area of spfps_-nmda were significantly greater in VH compared with DH slices. Asterisks denote statistical significance between DH and VH values (Mann–Whitney U test test, at *p < 0.05 or **p < 0.005). c Diagram illustrating the relationship between the rate of occurrence of spfps_-nmda and the slice position along the dorsoventral axis of the hippocampus. Only slices taken from the VH displayed positive correlation in their rates of spfps_-nmda as approached the end of the hippocampus structure (F = 2.5, p < 0.05). Note that slices taken from the most extreme positions did not show spfps_-nmda. The medial part of the hippocampus (i.e. locations 9-13) is not shown for clarity