Muscles of the tongue are derived from:
**Core Concept**
The embryological development of the tongue involves the formation of its musculature from specific **somites**. The muscles of the tongue are primarily involved in its movement and manipulation of food during the process of mastication and swallowing. This process is crucial for **deglutition** and **articulation**.
**Why the Correct Answer is Right**
The correct answer is related to the **occipital somites**, which are the source of the musculature of the tongue. During embryonic development, the **hypoglossal nerve** (cranial nerve XII) innervates these muscles, facilitating their movement. The development of tongue muscles from occipital somites is a key aspect of **craniofacial development**.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately represent the embryological origin of the tongue muscles.
**Option B:** Similarly, this option is incorrect as it does not correspond to the known developmental origin of tongue musculature.
**Option C:** This option is also incorrect as the tongue muscles do not derive from this source.
**Option D:** This is the correct answer, hence not incorrect.
**Clinical Pearl / High-Yield Fact**
It's crucial to remember that the **hypoglossal nerve** controls the movements of the tongue, and any damage to this nerve can result in **tongue deviation** towards the side of the lesion. Understanding the embryological origin of tongue muscles can provide insights into various **craniofacial anomalies**.
**Correct Answer:** D. Occipital somites.