ABSTRACT
Eighteen adult rabbits(0 9and 0 9, body weights 1.5～2kg) were selected for the present study. A solution of 5～15% HRP(RZ=2.9) 10% EB (Evans Blue) and 7% TY (Titan Yellow)was respectively injected into the subserosa of genital glands in fourteen rabbits and a solution of 35% HRP into the tibial nerves of the Sanyinchiao regions in other four rabbits. The uptake and retrograde transmission of HRP and of EB and TY in the afferent fibres of both the somatic and visceral nerves were traced to the spinal ganglia. In addition, anterograde transport were verified by using ARG method in two cats. The range of segments where the neurons give off these two afferent fibres overlap each other. The results were as follows: 1. The labelled sensory neurons from the region of the testis where HRP was injected were observed more concentrated in the spinal ganglia T11～L4, and the ovary in the spinal ganglia T10～L14. 2. The labelled neurons from the region of Sanyinchial were found more concentratedly in the spinal ganglia L_4～S_3. 3. The ranges of distribution of labelled neurons from the two groups of afferent fibres overlap in segment T7～L7.
ABSTRACT
Ten adult rabbits (7 and ♀3; body weights 1.5～2 kg) were selected for thee present study. A solution of 2～10％ HRP (RZ=2.9) was injected into the subserosa of the caecum in seven rabbits and a solution of 5～10％ HRP into the deep peroneal nerve of Tsusanli (足三里) region in the other three. The uptake and retrograds transmission of HRP in the afferent fibres of both the somatic and visceral nerves were traced to the spinal ganglia. The range of segments where the neurons from which these two afferent fibres originate overlap each other. The results are a follows:1. Labelled sensory neurons from the region of the caecum where HRP was injected are observed in the spinal ganglia C_8～S_3 with a higher concentration in T_(11)～L_2.2. Labelled neurons from the region of Tsusanli are found in the spinal ganglia L_1～S_3 with a higher concentration in L_6～S_2.3. The ranges of distribution of labelled neurons from the two groups of afferent fibres overlap in the segments L_1～S_3.4. Most of the labelled cells are small and medium in size and the Iabelled cells are found more concentrated in the lumbosacral segments.
ABSTRACT
The afferent projections to the hippocampus were studied with HRP. Thirty three per cent solution of HRP was slowly injected into the dorsal or ventral hippocampus on its right side in 25 albino rats and HRP-labelled cells were found in the following nuclei:1. On the ipsilateral side: entorhinal cortex, medial septal nucleus, supramammillary nucleus, submammillothalamic nucleus, dorsal raphe nucleus, median raphe nucleus, locus coeruleus, diagonal band and nucleus of superior colliculus.2. On the contralateral side: areas CA_3 and CA_4 of hippocampus and locus coeruleus.