Figure 4

Phase-contrast photomicrographs showing the effects of (a) NGF, (b) G. lucidum , (c) L. rhinocerotis , (d) P. giganteus , (e) G. frondosa , and (f) C. militaris on the morphology of differentiating N2a cells after 48 h. Untreated cells serve as control (g) and only contained 5% FBS as vehicle. Arrows indicate typical neurites of N2a. Scale bar represents 20 μm. Photomicrographs of representative microscope fields were taken with a 20× objective.