The structure which doesn’t pass through the parotid gland?
The facial nerve (CN VII) is a key one. It enters the parotid gland and divides into its branches. The external carotid artery also passes through the parotid gland. The retromandibular vein, formed by the union of the superficial temporal and maxillary veins, traverses the parotid. The auriculotemporal nerve, a branch of the mandibular division of the trigeminal nerve (CN V3), also passes through.
Now, the incorrect options might include structures like the internal carotid artery, which doesn't pass through the parotid gland. The internal jugular vein is deeper and doesn't go through the parotid. The hypoglossal nerve (CN XII) is in the neck and doesn't pass through the parotid. The lingual nerve is part of the floor of the mouth and doesn't traverse the parotid.
So, the correct answer would be one of these structures that don't pass through. Let me check the options again. If the options are A. Facial nerve, B. External carotid artery, C. Retromandibular vein, D. Lingual nerve, then D is the correct answer because the lingual nerve doesn't pass through the parotid. The lingual nerve is more anterior, in the floor of the mouth, and is associated with the submandibular gland. The facial nerve, external carotid artery, and retromandibular vein all pass through the parotid gland. Therefore, the structure that doesn't pass through is the lingual nerve.
**Core Concept**
The parotid gland is traversed by several neurovascular structures, including the facial nerve (CN VII), external carotid artery, retromandibular vein, and auriculotemporal nerve. Identifying structures that **do not** pass through the gland is critical for surgical and anatomical understanding.
**Why the Correct Answer is Right**
The **lingual nerve** (Option D) does not pass through the parotid gland. It is a branch of CN V3 (trigeminal nerve) that innervates the anterior 2/3 of the tongue and is located in the floor of the mouth. It is associated with the submandibular gland and lingual artery, not the parotid gland.
**Why Each Wrong Option is Incorrect**
**Option A:** The facial nerve (CN VII) enters the parotid gland and divides into five terminal branches.
**Option B:** The external carotid artery runs through the parotid gland, giving off branches like the superficial temporal and maxillary arteries.
**Option C:** The retromandibular vein, formed by the union of the superficial temporal and maxillary veins, traverses the parotid gland.
**Clinical Pearl / High-Yield Fact**
Remember that the facial nerve is the "master" structure of the parotid gland—its branches divide within