Erratum to: J Mol Neurosci DOI 10.1007/s12031-007-9022-x

Figure 2 is hereby replaced with the following:

Figure 2
figure 1

a Anti-NGF on BMSC transfected with recombinant (a1) and control (a2). BMSCs expressing NGF were seen in the transfected NGF gene group (a1), but not in non-transfected NGF gene group (a2). b Extension-like processes of neurons in the supernatant of NGF-gene-modified BMSC (b1) shows more significant than in the control group (b2). a and b Inverted phase contrast microscope ×250

Figure 4 and its legend are hereby replaced with the following:

Figure 4
figure 2

The results from the test for space exploration showed that the swim tracks of rats in group 4 mostly reached the underwater position of the platform but not those in the AD group. A significant decline in cognitive ability was observed in the AD group, while a significant improvement in cognition was seen in the BMSC or BMSC-NGF treated groups