From the Research
The ramus of the mandible is the part that is sandwiched between the masseter and lateral pterygoid muscles on a transverse cross-section. This vertical portion of the mandible forms the posterior part of the lower jaw and connects the body of the mandible to the temporomandibular joint. The masseter muscle attaches to the lateral surface of the ramus, while the lateral pterygoid muscle attaches to its medial surface, specifically at the pterygoid fovea on the condylar process. This arrangement creates a sandwich-like configuration in cross-section, with the bony ramus positioned between these two powerful muscles.
The studies provided do not directly address the specific anatomy of the mandible in relation to the masseter and lateral pterygoid muscles on a transverse cross-section. However, they do discuss the morphology and function of these muscles in various contexts, such as mandibular osteoradionecrosis 1, masseter muscle hypertrophy 2, and changes in masseter muscle morphology after setback osteotomy for mandibular prognathism 3. Additionally, the dislocation of the mandible and the role of the lateral pterygoid muscle in this process are discussed in another study 4.
Despite the lack of direct evidence, anatomical knowledge supports the fact that the ramus of the mandible is positioned between the masseter and lateral pterygoid muscles, which is crucial for jaw movement and function. The masseter and lateral pterygoid muscles work together to control mandibular elevation, depression, protrusion, and lateral movements during functions like chewing and speaking.
Key points to consider:
- The ramus of the mandible connects the body of the mandible to the temporomandibular joint.
- The masseter muscle attaches to the lateral surface of the ramus.
- The lateral pterygoid muscle attaches to the medial surface of the ramus, specifically at the pterygoid fovea on the condylar process.
- The arrangement of these muscles and the ramus creates a sandwich-like configuration in cross-section. The provided studies, although not directly addressing the question, offer insights into the complexities of mandibular anatomy and the functions of the surrounding muscles, highlighting the importance of understanding these relationships for both diagnostic and therapeutic purposes 5, 2, 1, 3, 4.