The intimal B cells of synovial membrane of temporomandibular joint are
**Core Concept**
The synovial membrane of the temporomandibular joint (TMJ) is a complex structure that plays a crucial role in joint function and pathology. The intimal layer of the synovial membrane is composed of a single layer of flat, plate-like cells that line the joint space.
**Why the Correct Answer is Right**
The intimal cells of the synovial membrane in the TMJ are indeed **fibroblasts**. These cells are responsible for the production and maintenance of the synovial fluid, which lubricates the joint and facilitates smooth movement. Fibroblasts also play a key role in the repair and remodeling of the synovial membrane in response to injury or disease.
**Why Each Wrong Option is Incorrect**
**Option A:** Macrophages are not typically found in the intimal layer of the synovial membrane, but rather in the synovial fluid and subintimal layer, where they play a role in phagocytosing debris and foreign particles.
**Option B:** Lymphocytes are not a primary component of the intimal layer of the synovial membrane, although they may be present in the synovial fluid and subintimal layer in response to inflammation.
**Option C:** Neutrophils are not typically found in the intimal layer of the synovial membrane, but rather in the synovial fluid and subintimal layer, where they play a role in phagocytosing bacteria and other pathogens.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the synovial membrane of the TMJ is a complex structure that can be affected by a range of disorders, including osteoarthritis, rheumatoid arthritis, and temporomandibular joint dysfunction. Understanding the histology and function of the intimal layer is crucial for diagnosing and managing these conditions.
**Correct Answer: C. Neutrophils are not typically found in the intimal layer, but the correct answer is actually not listed.