develops from develops from ends during starts during dorsolateral placode region trigeminal placode UBERON:0003070 xenopus_anatomy XAO:0000225 The ectodermal precursor of the trigeminal ganglion. The profundal and the trigeminal ganglia are separate distally but fused at their proximal end as they condense around NF stage 24. The trigeminal placode gives rise to the sensory neurons of the ophthalmic and maxillomandibular lobes of cranial nerve V. anterior placodal area neurogenic placode NF stage 22 NF stage 29 and 30