Case pg308, fig12,15. Soma notes 2 adult male hooded rats and 5 adult male albino rats were used. each received an injection of CT-HRP into the posterior chamber of the eye.. Terminal notes retinohypothalamic tract 3 components: 2) extension of SCN axonal plexus into the AHA and the RCA. this is sparse rostrally and grows increasingly dense caudally, where it extends to a wide zone caudal to the SCN including AHA and RCA.

Case pg348, fig3k. Soma notes 36 female Sprague-Dawley rats weighing 200-350g. 10 microliters of CT-HRP(.20%-.40%) were injected into one eye ?behind the lens into the vitreous chamber of the eye. pressure injection over 1 min. Terminal notes Medial component of the RHT included labeled fibres and terminals found near the midline entered the retrochiasmatic area. Along this path (extension of the medial component of the RHT) terminals were evident in the retrochiasmatic area.

Proceeding rostrally, a small contingent of ascending fibers from the RCHb projects to the preoptic region, providing sparse inputs to the preoptic periventricular nucleus, suprachiasmatic preoptic nucleus, anteroventral periventricular nucleus and medial part of the medial preoptic nucleus (Fig. 2A).

Collator note: the MPN projection has a light contralateral representation, which was not described in detail.