**Question:** Access to TMJ is made through:

A. Masseter muscle
B. Buccinator muscle
C. Temporalis muscle
D. Stellate ganglion

**Correct Answer:** .

**Core Concept:**
The TMJ, or Temporomandibular Joint, is a synovial joint that connects the mandible (lower jaw) to the temporal bone of the skull and plays a crucial role in jaw movement and speech. The muscles surrounding the TMJ are essential for its functioning.

**Why the Correct Answer is Right:**
The correct answer, **Option C: Temporalis muscle**, is the right choice because it is the primary muscle responsible for opening the mouth and jaw movement. It originates from the temporal bone and inserts on the mandibular condyle, allowing for jaw movement.

**Why Each Wrong Option is Incorrect:**

**Option A: Masseter muscle** is incorrect because it is primarily involved in clenching and biting, rather than opening the mouth. It originates from the masseteric process of the zygomatic arch and inserts on the medial aspect of the mandibular condyle.

**Option B: Buccinator muscle** is incorrect because it is involved in chewing and is located on the inner aspect of the cheek, near the mouth. It originates from the buccinator process and inserts on the medial surface of the body of the mandible.

**Option D: Stellate ganglion** is incorrect because it is a ganglion containing a cluster of sympathetic neurons that control various autonomic functions, not related to jaw movement or TMJ access. It is located on the cervical spine, near the carotid artery, and is unrelated to oral functions.

**Clinical Pearl:**

Understanding the anatomy of the TMJ and its surrounding muscles is essential for dental and medical professionals as it helps in diagnosing and treating disorders related to the TMJ, such as temporomandibular joint dysfunction (TMD). A thorough examination of these muscles and their functions is crucial for proper diagnosis and treatment planning.