Research Article
Three-Dimensional Morphological Characteristics of Lower Lumbar Intervertebral Foramen with Age
Figure 5
The results of BBA in different sagittal slice at L3/4-L5S1. Entrance: entrance slice of intervertebral foramen; exit: exit slice of intervertebral foramen; middle slice: the sagittal slice between the entrance and exit; Y: young aged group; M: middle aged group; O: old aged group. p<0.05 between two groups. p<0.01 between two groups.