NEUROANATOMICAL STUDY ON ORGANIZATION OF CENTRAL ANTENNAL PATHWAYS IN INSECTS .2. DEUTOCEREBRAL CONNECTIONS IN LOCUSTA-MIGRATORIA AND PERIPLANETA-AMERICANA
NEUROANATOMICAL STUDY ON ORGANIZATION OF CENTRAL ANTENNAL PATHWAYS IN INSECTS .2. DEUTOCEREBRAL CONNECTIONS IN LOCUSTA-MIGRATORIA AND PERIPLANETA-AMERICANA
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DOI：
10.1007/bf00221789
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发表时间：
1977-01-01
影响因子：
3.6
通讯作者：
BOECKH, V
中科院分区：
文献类型：
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作者：
ERNST, KD;BOECKH, J;BOECKH, V
Receptor cell axons from the antennal flagellum terminate in the glomeruli of the ipsilateral deutocerebrum in P. americana and L. migratoria. Processes from several groups of deutocerebral neurons enter the glomeruli and terminate in characteristic branching patterns. There, they contact the antennal axons. Connections are convergent and divergent. Single central neurons collect the inputs from many receptor cells, and receptor axons often branch and terminate at more than 1 deutocerebral neuron. The axons from a portion of the neurons form the deutocerebral bundle of the tractus olfactorioglobularis. These axons of the bundle terminate in the ipsilateral calyx of the corpus pedunculatum and in the lateral lobus protocerebri. The processes of the majority of the deutocerebral neurons stay within the deutocerebrum itself and may serve as local interneurons. Part of some antennal fibers terminate in the lobus dorsalis. The lobus glomeratus receives inputs from the maxillary palps and also from processes of deutocerebral neurons. EM of synaptic connections and anatomical experiments reveal a complicated pattern of connections between receptor axons and higher order neurons, and between higher order neurons themselves within the glomeruli. The ratio of the number of antennal fibers to that of relay fibers could easily lead to the interpretation that the deutocerebrum merely serves as a device for reducing the number of transmission channels. However, coupled with physiological data, anatomical details such as convergence and divergence of input and interconnections between input channels suggest a filtering system and a highly complicated integrative network.
