Abstract
Accessory Phrenic Nerve (APN) provides additional nerve bres to the Phrenic nerve (PN) once the latter crosses the lateral border of Scalenus Anterior muscle. The literature on APN describes many variations in origin, course and termination of this rare nerve. An adequate knowledge of APN can signicantly reduce lesions to the nerve supply of diaphragm and prevent dysfunction that may follow. This study focuses on the frequency of Accessory phrenic nerve in 60 dissected heminecks of 30 adult cadavers at the Department of Anatomy, Government Medical College, Kozhikode. An incidence of 30% was recorded. The signicant contribution from APN to PN has been of major interest to surgeons and in developing various novel procedures on PN.
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