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Stocker and Gendre provide the antennal nerve afferent counts based on TEM micrographs (Stocker and Gendre, 1988). Gross projection patterns within the brain were elucidated by Holmes-Blest reduced silver impregnation (Stocker et al., 1990). That the antennal nerve is composed of some 1200 third antennal segments and 500-600 fibers stemming from the JON and mechanosensory sensilla is based on two lines of evidence: 24hours after amputation of the funiculus, degeneration is seen in all but 500-600 fibers entering the antennal mechanosensory and motor center (Stocker et al., 1990); and Kamikouchi et al., (2006) used enhancer trap labelling and immunolabelling of JONs to trace their projections.

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  • Stocker and Gendre provide the antennal nerve afferent counts based on TEM micrographs (Stocker and Gendre, 1988). Gross projection patterns within the brain were elucidated by Holmes-Blest reduced silver impregnation (Stocker et al., 1990). That the antennal nerve is composed of some 1200 third antennal segments and 500-600 fibers stemming from the JON and mechanosensory sensilla is based on two lines of evidence: 24hours after amputation of the funiculus, degeneration is seen in all but 500-600 fibers entering the antennal mechanosensory and motor center (Stocker et al., 1990); and Kamikouchi et al., (2006) used enhancer trap labelling and immunolabelling of JONs to trace their projections.
definition
  • Nerve carrying the majority of afferents to the antennal lobe. Near its entrance to the brain it consists of about 1700-1800 axons. Approximately 1200 of these are sensory fibers from the third antennal segment, mainly axons from olfactory receptor neurons that project into the antennal lobe ventrally, at its antero-ventral corner (Stocker and Gendre, 1988; Kamikouchi et al., 2006). The remaining 500-600 fibers stem mainly from Johnston's organ neurons and mechanosensory sensilla of the anterior head capsule (Kamikouchi et al., 2006). These axons bypass the antennal lobe and target various neuropil domains including the antennal mechanosensory and motor center.
has_exact_synonym
  • AN
in_subset
has_obo_namespace
  • fly_anatomy.ontology
obo:id
  • FBbt:00003980
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