Case pg686-92, fig5,6,7. Soma notes 33 experiments in which 3H-amino acid injs, covered virtually every part of DG --Fig7: Injections into CA1 as well as DG but only labeling mossy fibre system-. Injections confined to septal 1/4 of inner blade (eg. DGR10). Terminal notes Initially, mossy fibres course transversely (slight rostral inclination) through CA3. As field CA1 approached fibres turn abruptly toward temp pole of HIP & course ~2mm in plane ||le to lat border of CA1, separated from it by narrow region (CA2)..

Case pg686-92, fig5,6,7. Soma notes 33 experiments in which 3H-amino acid injs, covered virtually every part of DG --Fig7: Injections into CA1 as well as DG but only labeling mossy fibre system-. Most temporal segment of inner blade (RH23). Terminal notes ?fibres appear to be relatively short (no more than 0.5mm in length) & transeversely orientated, to a first approx..

Injection was performed in DGpo. ipsilateral; Lorente de No ’34, rat, Golgi; Gottleib & Cowan 1973, autoradiography, rat. Collator note: DGpo includes Lorente de No field CA4, at least in rat

Injection was performed in DGpo. contralateral; Gottleib & Cowan 1973, autoradiography, rat. Collator note: DGpo includes Lorente de No field CA4, at least in rat

In summary, our findings indicate that granule cells in all parts of the dentate gyrus - the inner blade, the crest region and the outer blade - and at every septo-temporal level, give rise to mossy fibers in both the infra- and the supra-pyramidal bundles, and that at least some of these extend across the full transverse dimension of field CA3.