Original ArticleInnervation of the Corrugator Supercilii MuscleHwang, Kun MD, PhD*; Kim, Yu Jin MD, MS*; Chung, In Hyuk MD, PhD†Author Information *Department of Plastic Surgery, College of Medicine, Inha University, Incheon, Korea; and the †Department of Anatomy & BK 21 project for Medical Science, College of Medicine, Yonsei University, Seoul, Korea. Received March 27, 2003, and in revised form June 27, 2003. Accepted for publication June 27, 2003. Reprints: Kun Hwang, MD, PhD, Department of Plastic Surgery, College of Medicine, Inha University. 7-206 Sinheung-dong, Jung-gu, Incheon, 400–711, Korea. E-mail:[email protected] Annals of Plastic Surgery: February 2004 - Volume 52 - Issue 2 - p 140-143 doi: 10.1097/01.sap.0000095440.20407.0b Buy Metrics AbstractIn Brief The frowning forehead is unwanted, generally because it gives an impression of anger and displeasure. The frown is formed mainly by the repeated contraction of the corrugator supercilii muscle. We studied the relevant nerve supply to the muscle in detail to enhance selective neurotomy. A bicoronal incision extending downward to the preauricle was made and the subgaleal dissection proceeded in 19 hemifaces of cadavers. The temporal branch of the facial nerve was divided into 2 to 4 smaller branches at the zygomatic arch. There were commonly 3 branches. The temporal branch is located 10 mm lateral to the supraorbital notch or foramen 2.8 to 25 mm above the supraorbital rim. It contains 4 to 7 thin rami (5 on average). A plexus mainly from the inferior ramus partly from the middle ramus of the temporal branch of the facial nerve enters the corrugator supercilii muscle in the supraorbital area. Because the temporal branch had multiple interconnection among its own rami, selective blocking of the middle ramus cannot promise the elimination of the frown line. A cadaver study disclosed that the temporal branch of the facial nerve divided into two to four branches at the zygomatic arch. The inferior ramus was found to be the dominant contributor to the corrugator supercilii muscle in the supraorbital area. © 2004 Lippincott Williams & Wilkins, Inc.