Fig. 2.

The facial nerve innervating the lower eyelid and cheek. (A) An en bloc specimen. The temporal, zygomatic and buccal nerves were dissected and identified from the root of the facial nerve trunk. The resected specimen was turned over. All the pretarsal and preseptal orbicularis oculi muscles (OOMs) were innervated by five to seven terminal branches, which approached the OOM fibers at an angle of approximately 90 deg (original magnification ×10 before 37% reduction).(B) Higher magnification shows five to seven terminal branches that approached the OOM fibers at an angle of approximately 90 deg. T: temporal branch, Z: zygomatic branch, B: buccal branch (Hwang et al., 2001).