摘要
With the progress of the horseradish peroxidase (HRP) technique, some new connections between the spinal cord and the brain have been discovered. After injecting HRP into the spinal cord of the cat, we have also found some connections hitherto undescribed or not fully described. The HRP is generally used as a retrograde tracer. Some short-distance HRP anterograde tracing studies have also been published.
