Illustrated Encyclopedia of Human Anatomic Variation: Opus III: Nervous System
Ronald A. Bergman, PhD
Adel K. Afifi, MD, MS
Ryosuke Miyauchi, MD
Peer Review Status: Internally Peer Reviewed
"Fetus 5. This fetus presents certain features of bilateral
symmetry, and in particular the sites of origin of the sympathetic
cardiac rami are similar. Superior cervical contributions are absent
on both sides. There are no phrenic connections and the vagal
connection is bilateral. However, links with the recurrent laryngeal
nerve (arrows) are present on the left side only.
Fetus 6. On the left side sympathetic and parasympathetic cardiac rami (*) exchange nerve fibers as they proceed towards the heart. A cross-link (arrow) occurs between a middle cervical cardiac ramus and the ansa subclavia. "
From Ellison, J.P. and TH. Williams. Sympathetic nerve pathways to the human heart, and their variations. Am. J. Anat. 124:149-162, 1969.
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