The caudal portion of the fourth occipital somite
fuses with the cranial portion of the first cervical somite to form the proatlas.
Musculature of tongue, innervated by the Hypoglossal Nerve (CN XII), except for the palatoglossus (which is supplied by the Vagus nerve) is formed by the Occipital somites
At 7 weeks of gestation, the intrinsic musculature of the tongue is formed by the first four occipital somites
, which are innervated by the hypoglossal nerve.