Figure 2.
A: We find that GABAA receptor binding levels in layer IV decline immediately after nerve injury, and remain reduced 1–2 months later. A smaller reduction in binding is present for layers V–VI only with the longer survival period. B: GABAB receptor binding levels show progressive declines in layer IV and in layers V–VI. These reductions could be due to a decrease in binding affinity, or they could be due to an internalization of the ligand binding sites of the receptors.