Find your PDFs fast.
Welcome to the Pubget Medical Subject Headings (MESH) browser. Click on a topic or subtopic below to explore related papers. In the gold box is the most recent paper about the current MESH term, and below are 20 related papers.
Optic Lobe, Nonmammalian (0):
Recent article
Optic Lobe, Nonmammalian
Abstract
We examine how these pathways contribute to visual motion detection by combining genetic block and reconstitution of neural activity in different lamina cell types with whole-cell recordings from downstream motion-sensitive neurons. We find reduced responses to moving gratings if L1 or L2 is blocked...
|
PMID: 21068841
PDF is available here.
PDF is available here.
| < More recent | Older article > |
Abstract
Abstract
The optic tectum of zebrafish is involved in behavioral responses that require the detection of small objects. The superficial layers of the tectal neuropil receive input from retinal axons, while its deeper layers convey the processed information to premotor areas. Imaging with a genetically encode...
|
PMID: 21030657
PDF is available here.
PDF is available here.
Abstract
Our purpose was to investigate cell division and death in the optic lobes (OL) of workers, queens and males during pupation to identify how the differences in the compound eyes in adults of these classes are achieved. The results showed that OL differentiation follows a similar pattern in the three...
|
PMID: 20826951
PDF is available here.
PDF is available here.
Abstract
Although circadian rhythms are found in many peripheral tissues in insects, the control mechanism is still to be elucidated. To investigate the central and peripheral relationships in the circadian organization, circadian rhythms outside the optic lobes were examined in the cricket Gryllus bimaculat...
|
PMID: 20416318
PDF is available here.
PDF is available here.
Developmental Biology (344)2 2010
Abstract
We have rescued the developmental defect of a strong toy mutant allele and analyzed so expression in the ocelli primordium of toy loss-of-function eye-antennal discs during third instar larva. The results show that so expression is only marginally affected in the absence of Toy transcriptional activ...
|
PMID: 20580700
PDF is available here.
PDF is available here.
Abstract
We report the cloning of a cDNA from the honeybee (Am5-ht1A) sharing high similarity with members of the 5-HT(1) receptor class. Activation of Am5-HT(1A) by serotonin inhibited the production of cAMP in a dose-dependent manner (EC(50) = 16.9 nM). Am5-HT(1A) was highly expressed in brain regions know...
|
PMID: 20349263
PDF is available here.
PDF is available here.
Development (137)14 2010
Abstract
We describe here a role for the Fat-Hippo pathway in controlling the growth and differentiation of Drosophila optic neuroepithelia. Mutation of tumor suppressor genes within the pathway, or expression of activated Yorkie, promotes overgrowth of neuroepithelial cells and delays or blocks their differ...
|
PMID: 20570939
PDF is available here.
PDF is available here.
Brain research (1324) 2010
Abstract
The tumor suppressor vitamin D(3) up-regulated protein 1 (VDUP1) is expressed throughout the developing and mature Drosophila nervous system, but its regulatory pathways are not well understood. Within the developing Drosophila visual system, down-regulation of VDUP1 in lamina precursor cells (LPCs)...
|
PMID: 20138028
PDF is available here.
PDF is available here.
Current Biology (20)4 2010
Abstract
We analyze the structure and the functional role of fly tim2. tim2 is a large locus (approximately 75 kb) that harbors several transcribed intronic sequences. Using insertional mutations and tissue-specific RNA interference-mediated downregulation, we find that tim2 is an essential gene required for...
|
PMID: 20153199
PDF is available here.
PDF is available here.
Abstract
We consider separating CB and OLs and align them independently. This paper reports our automatic method to segregate CB and OLs, in particular under conditions where the signal to noise ratio (SNR) is low, the variation of the image intensity is big, and the relative displacement of OLs and CB is su...
|
PMID: 19698789
PDF is available here.
PDF is available here.
Abstract
We investigated the neural activity pattern of the optic lobes (OLs) in pollen-foragers and re-orienting bees, using the immediate early gene kakusei as a neural activity marker.
We performed double-in situ hybridization of kakusei and Amgad, the honeybee homolog of the GABA synthesi...
|
PMID: 20098617
PDF is available here.
PDF is available here.
Abstract
We focused on the medulla, an area within the optic lobe through which all of the visual information from the retina must pass before it proceeds to central brain areas. We used histological and immunocytochemical techniques to examine the bumblebee medulla and found that the medulla is divided into...
|
PMID: 19226517
PDF is available here.
PDF is available here.
Abstract
The locust's optic lobe contains a system of wide-field, multimodal, centrifugal neurons. Two of these cells, the protocerebrum-medulla-neurons PM4a and b, are octopaminergic. This paper describes a second pair of large centrifugal neurons (the protocerebrum-medulla-neurons PM1a and PM1b) from the b...
|
PMID: 19034464
PDF is available here.
PDF is available here.
Abstract
We characterized the structure and response of optic lobe (OL) neurons projecting to the calyces of the mushroom bodies in bees. Bees are well known for their visual learning and memory capabilities and their brains possess major direct visual input from the optic lobes to the mushroom bodies. To fu...
|
PMID: 18635397
PDF is available here.
PDF is available here.
Abstract
We identified the first-order interneurons downstream of the chromatic channels. Serial EM revealed that small-field projection neurons Tm5 and Tm9 receive direct synaptic input from R7 and R8, respectively, and indirect input from R1-R6, qualifying them to function as color-opponent neurons. Wide-f...
|
PMID: 18957224
PDF is available here.
PDF is available here.
Current Biology (18)17 2008
Abstract
Our findings support a monophyletic origin for the bilaterian visual system in which the last common ancestor of flies and vertebrates already contained a primordial visual system with photoreceptors, interneurons, and projection neurons....
|
PMID: 18723351
PDF is available here.
PDF is available here.
Abstract
We therefore used three methods. Immunoprecipitation using Pansorbin indicated that immunoreactive octopus brain molecules were capable of synthesizing acetylcholine. Western blot analysis after denatured gel electrophoresis of octopus brain extracts revealed a single band at approximately 81 kDa. A...
|
PMID: 18543295
PDF is available here.
PDF is available here.
Journal of Neuroscience (28)29 2008
Abstract
Our results suggest that the native receptor at the LMC synapse is an HCLA homomer, whereas HCLB signaling via the lamina glia plays a previously unrecognized role in shaping the LMC postsynaptic response....
|
PMID: 18632929
PDF is available here.
PDF is available here.
Abstract
We morphologically and physiologically characterized PDF-immunoreactive neurons in the optic lobe and the brain of the cricket Gryllus bimaculatus. PDF-immunoreactivity was detected in cells located in the proximal medulla (PDFMe cells) and those in the dorsal and ventral regions of the outer chiasm...
|
PMID: 18634795
PDF is available here.
PDF is available here.
Current Biology (18)9 2008
Abstract
We here show that the most dorsal hoverfly neuron (HS north [HSN]) is sexually dimorphic, with the male receptive field substantially smaller than in females or in either sex of blowflies. The (hoverfly-specific) HSN equatorial (HSNE) is, however, sexually isomorphic. Using complex optic flow, we sh...
|
PMID: 18450449
PDF is available here.
PDF is available here.
Current Biology (18)9 2008
Abstract
What are the neural correlates of vision? A recent study on Drosophila has described the incredible neuronal diversity in the fly visual system, and traced the circuits that underlie color vision.
|
PMID: 18460316
PDF is available here.
PDF is available here.
Cell and Tissue Research (332)2 2008
Abstract
The accessory medulla, the circadian clock of the cockroach Leucophaea maderae, is abundant in neuropeptides. Among these neuropeptides are the FMRFamide-related peptides (FaRPs), which generally share the C-terminal RFamide. As a first step toward understanding the functional role of FaRPs in the c...
|
PMID: 18338182
PDF is available here.
PDF is available here.
Current Biology (18)8 2008
Abstract
This precise characterization of the medulla circuitry will allow us to understand how color vision is processed in the optic lobe of Drosophila, providing a paradigm for more complex systems in vertebrates....
|
PMID: 18403201
PDF is available here.
PDF is available here.
Current Biology (18)5 2008
Abstract
We have overcome this problem by establishing in vivo whole-cell recordings from genetically targeted visual interneurons of Drosophila. Here, we describe the response properties of six motion-sensitive large-field neurons in the lobula plate that form a network consisting of individually identifiab...
|
PMID: 18328703
PDF is available here.
PDF is available here.
Developmental Biology (315)1 2008
Abstract
We show that In(1)omb(H31) causes selective loss of OMB expression from glial cells within the IOC previously identified as IOC giant glia (ICg-glia). In the absence of OMB, ICg-glia retain their glial cell identity and survive until the adult stage but tend to be displaced into the lobula complex n...
|
PMID: 18234176
PDF is available here.
PDF is available here.
Cell and Tissue Research (331)3 2008
Abstract
We have investigated the developmental regulation of Crz expression and the morphology of corazonergic neurons. From late embryo to larva, Crz expression is consistently detected in three neuronal groups: dorso-lateral Crz neurons (DL), dorso-medial Crz neurons (DM), and Crz neurons in the ventral n...
|
PMID: 18087727
PDF is available here.
PDF is available here.
Abstract
We set out to investigate whether in the crab Neohelice granulata melatonin was produced in the optic lobes of these animals and underwent rhythmic fluctuations related to the daily light/dark cycle. Our experimental animals were divided into three groups exposed to different photoperiods: normal ph...
|
PMID: 18165131
PDF is available here.
PDF is available here.
Biological Bulletin (214)1 2008
Abstract
Acetylcholine (ACh), which is synthesized from choline (Ch), is believed to hold a central place in signaling mechanisms within the central nervous system (CNS) of cuttlefish (Sepia officinalis) and other coleoid cephalopods. Although the main elements required for cholinergic function have been ide...
|
PMID: 18258770
PDF is available here.
PDF is available here.
Abstract
We hypothesize that in the presumed orientation center of the brain (central complex) e-vector orientation is population-coded by a set of "compass neurons." Using computer modeling, we present a neural network model transforming the signal triplet provided by the POL neurons to compass neuron activ...
|
PMID: 18057112
PDF is available here.
PDF is available here.
EMBO Journal (27)2 2008
Abstract
We establish that Nonstop actually functions as an ubiquitin protease to control the levels of ubiquitinated histone H2B in flies. We further establish that Nonstop is the functional homolog of yeast Ubp8, and can substitute for Ubp8 function in yeast cells. In yeast, Ubp8 activity requires Sgf11. W...
|
PMID: 18188155
PDF is available here.
PDF is available here.
Abstract
The optic lobes comprise approximately half of the fly's brain. In four major synaptic ganglia, or neuropils, the visual input from the compound eyes is received and processed for higher order visual functions like motion detection and color vision. A common characteristic of vertebrate and inverteb...
|
PMID: 18683642
PDF is available here.
PDF is available here.
Abstract
Tyrosine hydroxylase-like immunoreactivity is present in cell bodies and processes in the brain and optic lobes of Locusta migratoria, with processes projecting along the frontal connectives to form a neuropile within the frontal ganglion. Immunoreactive cell bodies and processes are also evident in...
|
PMID: 17953973
PDF is available here.
PDF is available here.
Abstract
We have studied the larvae of the sunburst diving beetle, Thermonectus marmoratus (Coleoptera: Dytiscidae), which are sophisticated visually oriented predators characterized by six elaborate stemmata on each side of the head and an associated large optic lobe. We used general neurohistological stain...
|
PMID: 18089121
PDF is available here.
PDF is available here.
Development Genes and Evolution (217)11-12 2007
Abstract
We have analysed the emergence of Engrailed-expressing cells in the embryonic brain of a parthenogenetic crayfish, the marbled crayfish (Marmorkrebs), and have compared our findings to the pattern previously reported from insects. Our data suggest that a group of six Engrailed-expressing neurons in...
|
PMID: 17960420
PDF is available here.
PDF is available here.
Cell and Tissue Research (330)2 2007
Abstract
We mapped the localisation of this peptide in the median brain and eyestalk neuropils of the marbled crayfish (Marmorkrebs), a parthenogenetic crustacean. Our experiments showed that crustacean-SIFamide is strongly expressed in all major compartments of the crayfish brain, including all three optic...
|
PMID: 17828557
PDF is available here.
PDF is available here.
Abstract
We propose that the excitatory terminations of the photoreceptors are in the innermost layer of the plexiform zone where the transmitter is likely to be glutamate and postsynaptic receptors are AMPA/kainate-like. Thus, the function of the terminal bags is to provide a location for a presynaptic chol...
|
PMID: 17953617
PDF is available here.
PDF is available here.
Abstract
We evaluated effects of tau on fast axonal transport (FAT) by using vesicle motility assays in isolated squid axoplasm. Effects of recombinant tau constructs on both kinesin-1 and cytoplasmic dynein-dependent FAT rates were evaluated by video microscopy. Exogenous tau binding to endogenous squid MTs...
|
PMID: 17265463
PDF is available here.
PDF is available here.
Toxicology (236)3 2007
Abstract
Closing the gap between adverse health effects of aluminum and its mechanisms of action still represents a huge challenge. Cholinergic dysfunction has been implicated in neuronal injury induced by aluminum. Previously reported data also indicate that in vivo and in vitro exposure to aluminum inhibit...
|
PMID: 17560001
PDF is available here.
PDF is available here.
Abstract
We analyzed transgenic reporter strains and performed in situ hybridization to show that both ninaB and ninaD are expressed in the adult brain but not retinal tissues. Developmental RT-PCR and tissue expression studies showed that ninaB is only expressed in the adult brain, while ninaD is expressed...
|
PMID: 17344064
PDF is available here.
PDF is available here.
Developmental Biology (305)1 2007
Abstract
We carried out the first assessment of the role of APC proteins in brain development, simultaneously inactivating both APC1 and APC2 in clones of cells in the Drosophila larval optic lobe. We focused on the medulla, where epithelial neural progenitors shift from symmetric to asymmetric divisions acr...
|
PMID: 17367777
PDF is available here.
PDF is available here.
Abstract
The purpose of this study is to delineate with high frequency ultrasound imaging the normal growth and development of the chick embryo throughout its incubation period. White Leghorn chick embryos were imaged through an opening in the egg air cell from incubation day 0-19 (Hamburger & Hamilton stage...
|
PMID: 17383805
PDF is available here.
PDF is available here.
Abstract
We demonstrate that Alk and its ligand Jelly belly (Jeb) play a central role as an anterograde signaling pathway mediating neuronal circuit assembly in the Drosophila visual system. Alk is expressed and required in target neurons in the optic lobe, whereas Jeb is primarily generated by photoreceptor...
|
PMID: 17350579
PDF is available here.
PDF is available here.
Abstract
These results suggested that the circadian pacemaker in the optic lobes of both male and female cockroaches participates in the control of mating, but that a pacemaker outside the optic lobes is also likely involved. Finally, it was shown that the female's olfactory response (measured by electroante...
|
PMID: 17229924
PDF is available here.
PDF is available here.
Abstract
Fly visual circuits are organized into lattice-like arrays and layers. Recent genetic studies have provided insights into how these reiterated structures are assembled through stepwise processes and how precise connections are established during development. Afferent-derived morphogens, such as Hedg...
|
PMID: 17204415
PDF is available here.
PDF is available here.
Abstract
We show that foraging behaviour exhibits properties characteristic of a circadian rhythm. Foraging activity is entrained by daily light cycles to periods close to 24 h, it changes predictably in response to phase shifts in light, and it is able to free-run under constant conditions. Dopamine levels...
|
PMID: 17063341
PDF is available here.
PDF is available here.
Abstract
Speed and acceleration are fundamental components of visual motion that animals can use to interpret the world. Behavioral studies have established that insects discriminate speed largely independently of contrast and spatial frequency, and physiological recordings suggest that a subset of premotor...
|
PMID: 17106704
PDF is available here.
PDF is available here.
Abstract
We generated sd(47M) flip-in mitotic clones. The mitotic clones had developmental defects in the leg and eye. Further, by removing the VG domains involved in activation, we created a reagent (VGDeltaACT) that disrupts the ability of SD to form a functional transcription factor complex and produced s...
|
PMID: 17110491
PDF is available here.
PDF is available here.
Abstract
Here we investigate the relationship between neural progenitor identity and spindle positioning in the Drosophila optic lobe. We use molecular markers and live imaging to show that there are two populations of progenitors in the optic lobe: symmetrically dividing neuroepithelial cells and asymmetric...
|
PMID: 17207270
PDF is available here.
PDF is available here.
Abstract
This paper examines the visual stimuli, recording methods, and cell identification techniques used to gather visual information from the household fly, Musca domestica. Visual information from the pre-processing layers of the household fly are explored in order to advance a biomimetic sensor that re...
|
PMID: 17487070
PDF is available here.
PDF is available here.
Abstract
Our present experiments demonstrate that, besides a possible derivation from neuronal cell bodies, axoplasmic RNAs originate in periaxonal glial cells and presynaptic RNAs derive from nearby cells, presumably glial cells. Indeed, in perfused squid giant axons, delivery of newly synthesized RNA to th...
|
PMID: 17284174
PDF is available here.
PDF is available here.
Abstract
We hypothesize that circadian rhythms might originate from coupled ultradian oscillations, possibly already at the single cell level....
|
PMID: 16983545
PDF is available here.
PDF is available here.
Abstract
We investigated whether the LGMD's receptive field for local motion stimuli can be explained by its electrotonic structure and the eye's anisotropic sampling of visual space. Five locust (Schistocerca americana) LGMD neurons were stained and reconstructed. We show that the excitatory dendritic field...
|
PMID: 17021031
PDF is available here.
PDF is available here.
Abstract
Reconstructions of silver-stained brains revealed 27 optic glomeruli that occupy a major volume of the lateral protocerebrum. Axons from different morphological types of columnar output neurons from the lobula complex sort out to specific glomeruli. Glomeruli are partially enwrapped by glial process...
|
PMID: 17099891
PDF is available here.
PDF is available here.
Abstract
Intracellular recordings accompanied by dye fills were made from neurons associated with optic glomeruli in the lateral protocerebrum of the brain of the blowfly Phaenicia sericata. The present account describes the morphology of these cells and their electrophysiological responses to oriented bar m...
|
PMID: 17099892
PDF is available here.
PDF is available here.
Abstract
We prepared 10 anti-Gryllus PDF monoclonal (mAb) and pAb antibodies and analyzed their detailed epitope specificities. The PDFMe and PDFLa inner cells and their axonal projections were clearly immunoreactive to all these antibodies, revealing the widespread immunocytochemical organization of the PDF...
|
PMID: 16998911
PDF is available here.
PDF is available here.
Abstract
We performed a systematic analysis of the visual projection neurons that connect the optic lobe and the central brain of Drosophila melanogaster. By screening approximately 4,000 GAL4 enhancer-trap strains we identified 44 pathways. The overall morphology and the direction of information of each pat...
|
PMID: 16802334
PDF is available here.
PDF is available here.
Abstract
These results suggest that the 2 classes of interneurons are differentially controlled by the circadian clock. The difference might be related to their functional roles in the animal's circadian behavioral organization....
|
PMID: 16864648
PDF is available here.
PDF is available here.
Neurochemical Research (31)8 2006
Abstract
Our aim was to establish a temporal correlation between cellular and molecular alterations induced by an acute hypoxia evaluated at different post-hypoxia (p-h) times and at two stages of chick optic lobe development: embryonic days (ED) 12 and 18. TUNEL assays at ED12 disclosed a significant increa...
|
PMID: 16868836
PDF is available here.
PDF is available here.
Abstract
We previously characterized some crustacean glial cells by markers such as 2',3'-cyclic nucleotide 3'-phosphodiesterase and glial fibrillary acidic protein. Here we use antibodies against glutamine synthetase full-length molecule (anti-GS/FL), a GS C-terminal peptide (anti-GS/20aa-C), and brain S100...
|
PMID: 16435368
PDF is available here.
PDF is available here.