Tongue muscle which is not developed from occipital myotome is
**Core Concept**
The development of tongue muscles is closely related to the embryological origin of the tongue, which is primarily derived from the first and second pharyngeal arches. The muscles of the tongue are innervated by the hypoglossal nerve (cranial nerve XII) and are divided into extrinsic and intrinsic muscles. The extrinsic muscles are responsible for the movement of the tongue, whereas the intrinsic muscles control its shape.
**Why the Correct Answer is Right**
The muscles of the tongue are primarily developed from the occipital somites, which give rise to the hypoglossal musculature. However, the palatoglossus muscle, which is an intrinsic muscle of the tongue, is developed from the occipital somites. This means that all the muscles of the tongue are developed from the occipital myotomes, except for one. The correct answer is the muscle that is not developed from the occipital myotomes, which is the palatoglossus.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided, so we cannot evaluate its correctness.
**Option B:** This option is not provided, so we cannot evaluate its correctness.
**Option C:** This option is not provided, so we cannot evaluate its correctness.
**Option D:** This option is not provided, so we cannot evaluate its correctness.
**Clinical Pearl / High-Yield Fact**
It is essential to remember that the muscles of the tongue are primarily developed from the occipital somites, with the exception of the palatoglossus muscle. This knowledge is crucial for understanding the embryological origin of the tongue and its associated muscles.
**Correct Answer:** D.