Optic lobe commissures in a three‐dimensional brain model of the cockroach <i>Leucophaea maderae</i>: A search for the circadian coupling pathways

Reischig, Thomas; Stengl, Monika

doi:10.1002/cne.10133

Cited by 59 publications

(102 citation statements)

References 51 publications

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“…The seven optic tracts (T1-T7) reported in the cockroach Leucophaea maderae (Reischig and Stengl, 2002) were identifiable in P. americana ( Fig. 2A-C).…”

Section: Gross Morphology Of Brain Neuropils and Sensory Tractsmentioning

confidence: 89%

“…2B). This region corresponds to the superior lateral protocerebrum (SLP, Reischig and Stengl, 2002). Fourth, axons forming T4, 5 and 6 gave rise to fine collaterals in the inferior lateral protocerebrum (Fig.…”

Section: Gross Morphology Of Brain Neuropils and Sensory Tractsmentioning

confidence: 97%

“…2A). A few fibers bypassing the AOTu ran in the anterior surface toward the contralateral side of the brain (Reischig and Stengl, 2002). Second, thin axons forming the T2 gave rise to collaterals in the lateral accessory lobe (LAL, Fig.…”

Section: Gross Morphology Of Brain Neuropils and Sensory Tractsmentioning

confidence: 99%

“…Functionally, it is noteworthy that dendritic fields of visual input neurons overlap with the projection sites of pigment-dispersing factor-immunoreactive neurons (circadian pacemaker candidates) in the cockroach Leucophaea maderae (Reischig and Stengl, 2002). In the L. maderae, the accessory medulla is the circadian pacemaker controlling locomotor activity rhythms (Reischig and Stengl, 2003).…”

Section: The Conserved Morphologies Of Theses Two Types Of Neurons Bementioning

confidence: 99%

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Visual and olfactory input segregation in the mushroom body calyces in a basal neopteran, the American cockroach

Nishino

Iwasaki

Yasuyama

et al. 2012

Arthropod Structure & Development

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The cockroach Periplaneta americana is an evolutionary basal neopteran insect, equipped with one of the largest and most elaborate mushroom bodies among insects.Using intracellular recording and staining in the protocerebrum, we discovered two new types of neurons that receive direct input from the optic lobe in addition to the neuron previously reported. These neurons have dendritic processes in the optic lobe, projection sites in the optic tracts, and send axonal terminals almost exclusively to the innermost layer of the MB calyces (input site of MB). Their responses were excitatory to visual but inhibitory to olfactory stimuli, and weak excitation occurred in response to mechanosensory stimuli to cerci. In contrast, interneurons with dendrites mainly in the antennal lobe projection sites send axon terminals to the middle to outer layers of the calyces. These were excited by various olfactory stimuli and mechanosensory stimuli to the antenna. These results suggest that there is general modality specific terminal segregation in the MB calyces and that this is an early event in insect evolution. Possible postsynaptic and presynaptic elements of these neurons are discussed.

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“…The seven optic tracts (T1-T7) reported in the cockroach Leucophaea maderae (Reischig and Stengl, 2002) were identifiable in P. americana ( Fig. 2A-C).…”

Section: Gross Morphology Of Brain Neuropils and Sensory Tractsmentioning

confidence: 89%

Section: Gross Morphology Of Brain Neuropils and Sensory Tractsmentioning

confidence: 97%

Section: Gross Morphology Of Brain Neuropils and Sensory Tractsmentioning

confidence: 99%

Section: The Conserved Morphologies Of Theses Two Types Of Neurons Bementioning

confidence: 99%

See 2 more Smart Citations

Visual and olfactory input segregation in the mushroom body calyces in a basal neopteran, the American cockroach

Nishino

Iwasaki

Yasuyama

et al. 2012

Arthropod Structure & Development

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show abstract

“…They lack innervations to the accessory medulla and this fact is consistent with our view that the accessory medulla is not a circadian clock locus in the cricket. Cockroaches also have similar neurons although their physiological properties are not clear (Roth and Sokolove, 1975;Reischig and Stengl, 2002). PDF neurons might be another candidate of output neurons.…”

Section: Output Pathway Of the Circadian Clockmentioning

confidence: 99%

Circadian Organization in Hemimetabolous Insects

Tomioka

Abdelsalam

2004

Zoological Science

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ABSTRACT-The circadian system of hemimetabolous insects is reviewed in respect to the locus of the circadian clock and multioscillatory organization. Because of relatively easy access to the nervous system, the neuronal organization of the clock system in hemimetabolous insects has been studied, yielding identification of the compound eye as the major photoreceptor for entrainment and the optic lobe for the circadian clock locus. The clock site within the optic lobe is inconsistent among reported species; in cockroaches the lobula was previously thought to be a most likely clock locus but accessory medulla is recently stressed to be a clock center, while more distal part of the optic lobe including the lamina and the outer medulla area for the cricket. Identification of the clock cells needs further critical studies. Although each optic lobe clock seems functionally identical, in respect to photic entrainment and generation of the rhythm, the bilaterally paired clocks form a functional unit. They interact to produce a stable time structure within individual insects by exchanging photic and temporal information through neural pathways, in which serotonin and pigment-dispersing factor (PDF) are involved as chemical messengers. The mutual interaction also plays an important role in seasonal adaptation of the rhythm.

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Patterns of PERIOD and pigment‐dispersing hormone immunoreactivity in the brain of the European honeybee (Apis mellifera): Age‐ and time‐related plasticity

Bloch

Solomon

Robinson

et al. 2003

J of Comparative Neurology

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We explored the neural basis of age- and task-related plasticity in circadian patterns of activity in the honeybee. To identify putative circadian pacemakers in the bee brain, we used antibodies against Drosophila melanogaster and Antheraea pernyi PERIOD and an antiserum to crustacean pigment-dispersing hormone (PDH) known to cross-react with insect pigment-dispersing factors (PDFs). In contrast to previous results from Drosophila, PDH and PER immunoreactivity (-ir) were not colocalized in bee neurons. The most intense PER-ir was cytoplasmic, in two groups of large neurons in the protocerebrum. The number of protocerebral PER-ir neurons and PER-ir intensity within individual cells were highest in brains collected during subjective night and higher in old bees than in young bees. These results are consistent with previous analyses of brain per mRNA in honeybees. Nuclear PER-ir was found throughout the brain, including the optic and antennal lobes. A single group of PDH-ir neurons (approximately 20/optic lobe) was consistently and intensely labeled at the medial margin of the medulla, independent of age or time of day. The processes of these neurons extended to specific neuropils in the protocerebrum and the optic lobes but not to the deutocerebrum. The patterns displayed by PER- and PDH-ir do not completely match any patterns previously described. This suggests that, although clock proteins are conserved across insect groups, there is no universal pattern of coexpression that allows ready identification of pacemaker neurons within the insect brain.

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Optic lobe commissures in a three‐dimensional brain model of the cockroach Leucophaea maderae: A search for the circadian coupling pathways

Cited by 59 publications

References 51 publications

Visual and olfactory input segregation in the mushroom body calyces in a basal neopteran, the American cockroach

Visual and olfactory input segregation in the mushroom body calyces in a basal neopteran, the American cockroach

Circadian Organization in Hemimetabolous Insects

Patterns of PERIOD and pigment‐dispersing hormone immunoreactivity in the brain of the European honeybee (Apis mellifera): Age‐ and time‐related plasticity

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