We wish to quantify the morbidity that is associated with the specific methods used to detach the temporalis muscle from the skull. Many variables regarding the way the temporalis is detached will be recorded and assessed in the group randomized to traditional pterional craniotomy. Additionally, many methods will be used to measure post-operative temporalis atrophy and/or dysfunction in the two randomized groups. After post-operative morbidity has been quantified, we plan to compare the traditional pterional group to the osteoplastic group and assess for significance.