Abstract
The pattern of Rexed's lamination and the situation of the FRAP-reactive band in the superficial dorsal horn were studied in transverse sections of the cervical cord of the rat from the day of birth (P0) to postnatal day P20. Laminae I, II and III increased moderately in thickness during this period, but the outer (II o) and inner (II i) zones of lamina II underwent opposite evolutions. Lamina II i nearly doubled in thickness while lamina II o decreased markedly. The FRAP-band was large on days P2 and P5 virtually covering lamina II i, then shrank to a thinner strip in its dorsal part. It is suggested that lamina II i growth is due to the massive arrival of FRAP-reactive thin primary axons followed by large afferents from deep layers occurring during the postnatal period, and the subsequent establishment of synaptic connections with the developing dendritic trees of dorsal horn cells.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
