Which muscle assists in frowning and is located at the chin?

The muscle that assists in frowning and is located at the chin is the Depressor anguli oris. This muscle plays a critical role in facial expressions, particularly in lowering the corners of the mouth, which is a key movement associated with frowning. Its anatomical position near the lower aspect of the face allows it to effectively pull down on the corners of the mouth, contributing to the expression of displeasure or sadness.

Understanding the functions of facial muscles is important in contexts such as facial anatomy and expressions. The Masseter, while also a facial muscle, primarily functions in chewing and does not contribute to frowning. The Zygomaticus major, on the other hand, is involved in smiling and elevating the corners of the mouth, thus opposing the action of the Depressor anguli oris. The Temporalis muscle is primarily involved in mastication, not facial expressions. Hence, the Depressor anguli oris is uniquely suited to the role of frowning due to its function and location in the facial structure.