Palmer Spinal Exam 4 Practice

The boundary that defines the roof of the temporal region is the fascia that envelops the temporalis muscle. Specifically, the temporal fascia (the superficial layer) together with the deep investing fascia of temporalis form a continuous sheath over the temporal region, effectively acting as its roof. The deep fascia splits around the temporalis, creating the enclosure that covers the muscle and spans to the zygomatic arch and superior temporal line, which is why this combination best forms the roof. In contrast, the pericranium is the periosteum lining the skull bones and does not shape the roof of the temporal region. The galea aponeurotica sits higher, over the scalp, and the skin with subcutaneous tissue are the superficial layers; they do not define the roof of the temporal region.