Masseter muscle is partly concealed, anteriorly, by the superficial portion. Posteriorly, it is covered by the parotid gland. Along with the other three muscles of mastication (temporalis, medial pterygoid, and lateral pterygoid), the masseter is innervated by the anterior division of the mandibular division (V3) of the trigeminal nerve. The innervation pathway is: gyrus precentralis > genu capsula interna > nucleus motorius nervi trigemini > nervus trigeminus > nervus mandibularis > musculus masseter. The action of the muscle during bilateral contraction of the entire muscle is to elevate the mandible, raising the lower jaw. Elevation of the mandible occurs during the closing
What Hurts the Most 100 as well as their lowest-charting lead single. Aside from charting on the Hot 100, the song managed to peak at the top of "Billboard" Hot Dance Club Songs and at number twenty-eight on the US "Billboard" Pop Songs. Despite its low peak on the Hot 100, the song managed to sell more than 500,000 downloads, earning a Gold certification by the Recording Industry Association of America in October 2009. In Canada, the song managed to peak at number fifty-four and lasted on the chart for eleven weeks. The music video for "What Hurts the Most" was filmed in Los