|
|
|
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
|
Fig. 4. Developmental profiles of neurones immunoreactive to RPCH and CCAP during
embryonic development. (A) RPCH-IR neurones (X-organ) and immunopositive
endings within the sinus gland (sg) in the eye, 5-6 days after eye anlage
formation. (B) RPCH-IR structures in the brain and eye 6-7 days after eye
anlage formation. Note that immunoreactivity in the X-organ (arrowheads) is
weak, but that three pairs of prominent cells in the protocerebrum (arrows)
now give rise to descending axons. (C) RPCH-IR structures in an embryo 2-3
days before hatching. Note descending axons, some (if not all) of which
project contralaterally, anterior to the oesophagus (oe, arrow), and the
prominence of, and connections to the putative post-commissural organs (pco),
which dorsally project three digitate extensions (small arrows). (D) CCAP-IR
structures associated with the thoracic ganglion and pericardial organs during
mid-eye development. Large arrow, the posterior bar of the pericardial organ;
small arrows, contralateral projections of axons reminiscent of those seen in
the adult. Perikarya were never observed in these preparations. Abbreviations:
oe, oesophagus; pco, post-commissural organs; s, segmental nerve; sa, sternal
artery; sg, sinus gland. Scale bars: 50 µm.
|
