Fig. 4. A graph showing the percentage loss of motoneurons in the lumbar cord of the retinoid-deficient rats compared with the normally fed rats. Columns: 1, normally fed rats; 2, retinoid-deficient rats; 3, motoneurons with vacuolations in the retinoid-deficient rat. Error bar=s.e.m. There was a significant difference between the percentage of motoneurons in the normal and retinoid-deficient rats of ^*P<0.01. Students t-test, n=5-8.