MAP2 and Alzheimer disease: The number of MAP2 positive cells in the hippocampus was significantly lower in the AD-TBI group (27.00±2.53 neurons/HPF) compared to the AD-sham group (39.00±3.16 neurons/HPF, p<0.01) and NT-Sham group (53.81±9.49 neurons/HPF, p<0.05) (Figure 5B).