Studies on the Granular Inclusion in the Nerve Cells of the Prawn, Penaeus japonicus BATE IV : Identification of the Cell Bodies of the Neurons Deriving from the Supraoesophageal Ganglion

Abstract

Neurons of such nerves as the optic, oculomotor, antennal gland, tegumental, endo- and exopodites of the 2nd antenna, as well as of the protocephalon attractor, were traced to their cell bodies in the supraoesophageal ganglion. Procion yellow was injected electrophoretically into the cut end of each axon at near level of its deriving site from the ganglion. Oculomotor neuron running along the optic nerve had its small cell body in the superior of opposite dorsal olfactory lobe ganglion cell group (DO). As for the oculomotor nerve derived from the lateral side of the ganglion, instead of the cell body, diverged branches were recognized in the neuropile dorso-interior to the olfactory lobe. Neuron in the endopodite nerve of the 2nd antenna had its large cell body in the posterior to the DO, dorsal to the ventral olfactory lobe ganglion cell group (VO), and a little anterior to the posterior ganglion cell group (P). Neuron in the exopodite nerve of the 2nd antenna had its large cell body in the inferior to the former neuron. For the antennal gland nerve, its neuron had a large cell body in the P. Neuron in the tegumental nerve had its cell body in the posterior to the DO and dorsal to the VO. The cell body of the neuron in the nerve to the protocephalon attractor was a giant size, being situated at the hind region of the ventro-posterior ganglion cell group. And its function seemed to be related with the oculomotor circuit because of its indirect control of the eye-stalk abductor via a muscular linkage.1. クルマエビの食道上神経節より派生する眼柄,動眼,第2触角内肢・外肢,触角腺,殻および原頭部牽引節の各神経に関して,プロシオン黄注入法による軸索逆行追跡を試みた。2. 眼柄神経内を走る動眼神経の細胞体は該当眼柄とは反対側の背面嗅葉部神経節細胞集団の上部に位置する細胞集団に所在する小形細胞で,軸索は神経氈内で樹状分枝を派生する。3. 食道上神経節より派生する動眼神経内の軸索は当該神経節には細胞体を確認出来ず,その分枝終末は嗅葉内側の背部神経氈中に認められた。4. 第2触角内肢神経の軸索の細胞体は後部神経節細胞集団の少し前方,腹面嗅葉部神経節細胞集団の背方,背面嗅葉部神経節細胞集団の後方に位置する細胞集団に所在する大形細胞である。5. 第2触角外肢神経の軸索の細胞体は内肢軸索の細胞体より少し腹方に位置する細胞集団に所在する大形細胞である。6. 触角腺神経の軸索の細胞体は後部神経節細胞集団に所在する大形細胞である。7. 殻神経の軸索の細胞体は背面嗅葉部神経節細胞集団の後方,腹面嗅葉部神経節細胞集団の背方に位置する細胞集団に所在する大形細胞である。8. 原頭部牽引筋支配神経の軸索の細胞体は腹面後部神経節細胞集団の後部を占める巨大 細胞であると同定された。加えて該当筋は眼柄運動に関与する筋肉と連動した機能が推察される点から,当該細胞集団は動眼ニウロン群と重要不可欠の回路網を形成する可能性を指摘した。departmental bulletin pape