Figure 6From: Expression and regulation of neurotrophins in the nondegenerate and degenerate human intervertebral discNeurotrophin receptor immunopositivity in the nondegenerate and degenerate intervertebral disc. Histograms illustrating the percentage of (a) positive Trk-A cells and (b) Trk-B immunopositive cells in the nucleus pulposus (NP), inner annulus fibrosus (IAF) and outer annulus fibrosus (OAF) regions of nondegenerate, moderately degenerate and severely degenerate intervertebral disc (IVD) tissue. **Significance between regions of the IVD (P < 0.05). Data presented as the mean ± standard error of the mean.Back to article page