Journal ArticleDOI
Subdivisions of hymenopteran mushroom body calyces by their afferent supply
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The data suggest that the many parallel channels of intrinsic neurons may each process different aspects of sensory input information within the mushroom body's calyx, which is particularly large in social Hymenoptera.Abstract:
The mushroom bodies are regions in the insect brain involved in processing complex multimodal information. They are composed of many parallel sets of intrinsic neurons that receive input from and transfer output to extrinsic neurons that connect the mushroom bodies with the surrounding neuropils. Mushroom bodies are particularly large in social Hymenoptera and are thought to be involved in the control of conspicuous orientation, learning, and memory capabilities of these insects. The present account compares the organization of sensory input to the mushroom body's calyx in different Hymenoptera. Tracer and conventional neuronal staining procedures reveal the following anatomic characteristics: The calyx comprises three subdivisions, the lip, collar, and basal ring. The lip receives antennal lobe afferents, and these olfactory input neurons can terminate in two or more segregated zones within the lip. The collar receives visual afferents that are bilateral with equal representation of both eyes in each calyx. Visual inputs provide two to three layers of processes in the collar subdivision. The basal ring is subdivided into two modality-specific zones, one receiving visual, the other antennal lobe input. Some overlap of modality exists between calycal subdivisions and within the basal ring, and the degree of segregation of sensory input within the calyx is species-specific. The data suggest that the many parallel channels of intrinsic neurons may each process different aspects of sensory input information.read more
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Journal ArticleDOI
Structure of the mushroom bodies of the insect brain
TL;DR: This review provides a concise, contemporary overview of the structure of the mushroom bodies and discusses the volume plasticity of mushroom body neuropils evident in the brains of some adult insects and a possible essential role for the gamma lobe in olfactory memory.
Journal ArticleDOI
Three-dimensional average-shape atlas of the honeybee brain and its applications
Robert Brandt,Torsten Rohlfing,Jürgen Rybak,Sabine Krofczik,Alexander Maye,Malte Westerhoff,Hans-Christian Hege,Randolf Menzel +7 more
TL;DR: 3‐D reconstructions of single projection neurons connecting the antennal lobe with the mushroom body and lateral horn, groups of intrinsic mushroom body neurons, and a single mushroom body extrinsic neuron are presented, aiming to compose components of the olfactory pathway in the honeybee.
Journal ArticleDOI
Dual olfactory pathway in the honeybee, Apis mellifera.
Sebastian Kirschner,Christoph Johannes Kleineidam,Christina Zube,Jürgen Rybak,Bernd Grünewald,Wolfgang Rössler +5 more
TL;DR: The results indicate that olfactory input in the honeybee is processed via two separate, mainly uPN pathways to the MB calyx and LH and several pathway to the lateral protocerebrum.
Journal ArticleDOI
Segregation of visual input to the mushroom bodies in the honeybee (Apis mellifera).
Birgit Ehmer,Wulfila Gronenberg +1 more
TL;DR: This work describes visual inputs to the calyces of the mushroom bodies of the honeybee Apis mellifera, the neurons' dendritic fields in the optic lobes, the medulla and lobula, and the organization of their terminals in the calYces, indicating that the mushroom body may be composed of many more functional subsystems than previously suggested.
Journal ArticleDOI
The neurobiology of insect olfaction: sensory processing in a comparative context.
Joshua P. Martin,Aaron Beyerlein,Andrew M. Dacks,Andrew M. Dacks,Carolina E. Reisenman,Jeffrey A. Riffell,Jeffrey A. Riffell,Hong Lei,John G. Hildebrand +8 more
TL;DR: This work discusses variations on the basic anatomy of the antennal (olfactory) lobe of the brain and higher-order olfactory centers of insects, and draws connections between particular features of the Olfactory neurobiology of a species and the animal's life history.
References
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Journal ArticleDOI
Associative odor learning in Drosophila abolished by chemical ablation of mushroom bodies
JS de Belle,Martin Heisenberg +1 more
TL;DR: The results demonstrate that MBs mediate associative odor learning in flies, and that adult flies developing without MBs are unable to perform in a classical conditioning paradigm that tests associative learning of odor cues and electric shock.