The temporoparietal fascia is the most superficial layer beneath the subcutaneous fat. Frequently called the superficial temporal fascia or the zygomatic SMAS, this fascia layer is the lateral extension of the galea and is continuous with the SMAS of the face (Fig. 6-2). Because this fascia is just beneath the skin, it may go unrecognized after incision. The blood vessels of the scalp, such as the superficial temporal vessels, run along its outer aspect, adjacent to the subcutaneous fat. The motor nerves, such as the temporal branch of the facial nerve, run on its deep surface.
The subgaleal fascia in the temporoparietal region is well developed and can be dissected as a discrete fascial layer, although it is used only as a cleavage plane in the standard coronal approach (see Fig. 6-2).
The temporalis fascia is the fascia of the temporalis muscle. This thick layer arises from the superior temporal line, where it fuses with the pericranium (see Fig. 6-1). The temporalis muscle arises from the deep surface of the temporalis fascia and the whole of the temporal fossa. At the level of the superior orbital rim, the temporalis fascia splints into the superficial layer attaching to the lateral border and the deep layer attaching to the medial border of the zygomatic arch. A small quantity of fat, sometimes called the superficial temporal fat pad, separates the two layers. Dissection through the medial layer of the temporalis fascia reveals another layer of fat, the temporal portion of the buccal fat pad, which is continuous with the other portion of the buccal fat pad of the cheek below the zygomatic arch. This fat pad separates the temporalis muscle from the zygomatic arch and from the other muscles of mastigation, allowing a smooth gliding motion during function.
Was this article helpful?