the frequency of vacuolated anterior horn cells was not different at the individual ages studied ( 3 and 6 weeks , 3 months ) , but with the three ages combined , the frequency in the two systems differed significantly , being 1.7 +/- 0.9 % in the cervical and 0.6 +/- 0.7 % in the lumbar anterior horns ( p = 0.005 ) .
C0003154
anterior horn
C0228590
anterior horns