In cat four times as many lamina I neurons project to the parabrachial nuclei and twice as many to the periaqueductal gray as to the thalamus
Keywords: mesencephalon; spinothalamic; pain; marginal layer; nociception; spinal cord; DAB; diaminobenzidine; PAG; periaqueductal gray; PBN; parabrachial nuclei; WGA-HRP; wheat germ agglutinin-conjugated horseradish peroxidase;