Neurogenic placode

Neurogenic placode
Details
PrecursorEctoderm
Gives rise toCranial ganglia, peripheral nervous system
Identifiers
Latinplacode neurogenica
Anatomical terminology

In embryology, a neurogenic placode is an area of thickening of the epithelium in the embryonic head ectoderm layer that gives rise to neurons and other structures of the sensory nervous system.[1]

Placodes are embryonic structures that give rise to structures such as hair follicles, feathers and teeth. The term "neurogenic placode" generally refers to cranial placodes that have neurogenic potential - i.e. those that give rise to neurons associated with the special senses and cranial ganglia. Cranial placodes include a diverse range of structures found across chordates, but the neurogenic placodes found in vertebrates arose later in evolution.[1]

The region in the ectoderm of the developing head that contains all the precursor cells for the cranial placodes is known as the preplacodal region.[2]

  1. ^ a b Park, Saint-Jeannet (2010). "Introduction". Induction and Segregation of the Vertebrate Cranial Placodes. Morgan & Claypool Life Sciences.
  2. ^ Streit, A (2007). "The preplacodal region: an ectodermal domain with multipotential progenitors that contribute to sense organs and cranial sensory ganglia". The International journal of developmental biology. 51 (6–7): 447–61. doi:10.1387/ijdb.072327as. PMID 17891708.