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Early in life, there is a delicate and critical balance aimed to maintain low hormone responses derived from the stress responsive hypothalamic-pituitary-adrenal axis (HPA). However, in the infant rat hypothalamic corticotrophin-releasing hormone (CRH) stress responses to environmental events are clearly seen even though other elements of the HPA axis may(More)
This study describes migrating cranial neural crest cells and the microenvironment through which they migrate in chick embryos. Just prior to and during cell migration, an extensive fibrillar meshwork is observed, particularly on the outer surface of the neural tube and the inner surface of the ectoderm. This meshwork in general had a random orientation.(More)
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