Temporal extension of the skin incision line
Below the superior temporal line the subgaleal plane continues deep to the temporoparietal fascia. One continues dissecting on top of the temporalis fascia to the level of the zygomatic arch.
An inadvertent incision through the temporalis fascia into the underlying muscle may result in brisk bleeding.
For this reason prior to extending the skin incision inferolaterally, the temporal soft-tissue envelope is undermined in the subgaleal plane towards the auricular helix with curved scissors. The scissors are introduced on the temporalis fascia as shown in the illustration, ...