Neural Mechanisms That Underlie Angina-Induced Referred Pain in the Trigeminal Nerve Territory: A c-Fos Study in Rats

<table>Effects of vagotomy on c-Fos expression in PPS-infused rats. The cervical vagus nerve was bilaterally sectioned. Photomicrographs show c-Fos expression in the left Sp5C (a) and the C2 spinal segment (b). Fos-labeled cells were observed in intact rats (a-A and b-A). The Fos-labeled cells were not observed in the vagotomy rats (a-B and b-B).</table>

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Figure 5

Figure 5: Neural Mechanisms That Underlie Angina-Induced Referred Pain in the Trigeminal Nerve Territory: A c-Fos Study in Rats 