keyword
MENU ▼
Read by QxMD icon Read
search

zebra finch

keyword
https://www.readbyqxmd.com/read/28346140/em-connectomics-reveals-axonal-target-variation-in-a-sequence-generating-network
#1
Jörgen Kornfeld, Sam E Benezra, Rajeevan T Narayanan, Fabian Svara, Robert Egger, Marcel Oberlaender, Winfried Denk, Michael A Long
The sequential activation of neurons has been observed in various areas of the brain, but in no case is the underlying network structure well understood. Here we examined the circuit anatomy of zebra finch HVC, a cortical region that generates sequences underlying the temporal progression of the song. We combined serial block-face electron microscopy with light microscopy to determine the cell types targeted by HVC(RA) neurons, which control song timing. Close to their soma, axons almost exclusively targeted inhibitory interneurons, consistent with what had been found with electrical recordings from pairs of cells...
March 27, 2017: ELife
https://www.readbyqxmd.com/read/28324066/hippocampal-aromatization-modulates-spatial-memory-and-characteristics-of-the-synaptic-membrane-in-the-male-zebra-finch
#2
David J Bailey, Yekaterina V Makeyeva, Elizabeth R Paitel, Alyssa L Pedersen, Angel T Hon, Jordan A Gunderson, Colin J Saldanha
The estrogen-synthesizing enzyme aromatase is abundant at the synapse in the zebra finch hippocampus (HP) and its inhibition impairs spatial memory function. To more fully test the role of local estradiol (E2) synthesis in memory, the HP of adult male zebra finches was exposed to either control pellets or those containing the aromatase inhibitor ATD, ATD and E2, ATD and the G protein-coupled estrogen receptor (GPER) agonist G1, or the antagonist G15 alone. Birds were tested for spatial memory acquisition and performance, and HP levels of the postsynaptic protein PSD95 were measured...
January 27, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323640/a-micro-scale-printable-nanoclip-for-electrical-stimulation-and-recording-in-small-nerves
#3
Charles A Lissandrello, Winthrop F Gillis, Jun Shen, Ben W Pearre, Flavia Vitale, Matteo Pasquali, Bradley J Holinski, Daniel J Chew, Alice E White, Timothy J Gardner
OBJECTIVE: The vision of bioelectronic medicine is to treat disease by modulating the signaling of visceral nerves near various end organs. In small animal models, the nerves of interest can have small diameters and limited surgical access. New high-resolution methods for building nerve interfaces are desirable. In this study, we present a novel nerve interface and demonstrate its use for stimulation and recording in small nerves. APPROACH: We design and fabricate micro-scale electrode-laden nanoclips capable of interfacing with nerves as small as 50 µm in diameter...
March 21, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28316895/interacting-effects-of-early-dietary-conditions-and-reproductive-effort-on-the-oxidative-costs-of-reproduction
#4
Jose Carlos Noguera
The hypothesis that oxidative damage accumulation can mediate the trade-off between reproduction and lifespan has recently been questioned. However, in captive conditions, studies reporting no evidence in support of this hypothesis have usually provided easy access to food which may have mitigated the cost of reproduction. Here, I test the hypothesis that greater investment in reproduction should lead to oxidative damage accumulation and telomere loss in domestic zebra finches Taeniopygia guttata. Moreover, since the change or fluctuation in diet composition between early and late postnatal period can impair the ability to produce antioxidant defences in zebra finches, I also tested if early nutritional conditions (constant vs fluctuating early diet) influenced the magnitude of any subsequent costs of reproduction (e...
2017: PeerJ
https://www.readbyqxmd.com/read/28316137/more-for-less-analysis-of-the-performance-of-avian-acute-oral-guideline-oecd-223-from-empirical-data
#5
Peter J Edwards, Annegaaike Leopold, Joann B Beavers, Timothy A Springer, Peter Chapman, Samuel K Maynard, Patrick Hubbard
Since the publication of avian acute oral guideline OECD223, empirical data have become available to compare the performance of OECD223 with statistical simulations used to validate this guideline and with empirical data for USEPA Guideline OCSPP850.2100. Empirical studies comprised 244 for Northern bobwhite of which 73 were dose response tests and 171 were limit tests. Of the dose response tests, 26 were conducted to OECD223 (using 3-4 stages) and 33 to OCSPP850.2100 (using the single 50 bird design). Data were collected from five avian testing laboratories from studies performed between 2006 and 2013...
March 18, 2017: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/28314822/topography-and-lateralized-effect-of-acute-aromatase-inhibition-on-auditory-processing-in-a-seasonal-songbird
#6
Geert De Groof, Jacques Balthazart, Charlotte A Cornil, Annemie Van der Lindena
It is increasingly recognized that brain-derived estrogens (neuroestrogens) can regulate brain physiology and behavior much faster than what was previously known from the transcriptional action of estrogens on nuclear receptors. One of the best examples of such neuromodulation by neuroestrogens concerns the acute regulation of sensory coding by the auditory cortex as demonstrated by electrophysiological studies of selected neurons in zebra finches. Yet, the spatial extent of such modulation by neuroestrogens is not known...
March 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28293176/muscarinic-receptors-are-responsible-for-the-cholinergic-modulation-of-projection-neurons-in-the-song-production-brain-nucleus-ra-of-zebra-finches
#7
Wei Meng, Songhua Wang, Lihua Yao, Nan Zhang, Dongfeng Li
Songbirds are a useful model for the study of learned vocal behavior in vertebrates. The robust nucleus of the arcopallium (RA) is a premotor nucleus in the vocal motor pathway. It receives excitatory synaptic inputs from the anterior forebrain pathway. RA also receives cholinergic inputs from the ventral paleostriatum of the basal forebrain. Our previous study showed that carbachol, a non-selective cholinergic receptor agonist, modulates the electrophysiology of RA projection neurons (PNs), indicating that cholinergic modulation of RA may play an important role in song production...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28278362/testing-the-phenotype-linked-fertility-hypothesis-in-the-presence-and-absence-of-inbreeding
#8
Wolfgang Forstmeier, Malika Ihle, Pavlína Opatová, Katrin Martin, Ulrich Knief, Jana Albrechtová, Tomáš Albrecht, Bart Kempenaers
The phenotype-linked fertility hypothesis suggests that females can judge male fertility by inspecting male phenotypic traits. This is because male sexually selected traits might correlate with sperm quality if both are sensitive to factors that influence male condition. A recent meta-analysis found little support for this hypothesis, suggesting little or no shared condition dependence. However, we recently reported that in captive zebra finches (Taeniopygia guttata) inbreeding had detrimental effects both on phenotypic traits and on measures of sperm quality, implying that variation in inbreeding could induce positive covariance between indicator traits and sperm quality...
March 9, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28271185/to-transduce-a-zebra-finch-interrogating-behavioral-mechanisms-in-a-model-system-for-speech
#9
Jonathan B Heston, Stephanie A White
The ability to alter neuronal gene expression, either to affect levels of endogenous molecules or to express exogenous ones, is a powerful tool for linking brain and behavior. Scientists continue to finesse genetic manipulation in mice. Yet mice do not exhibit every behavior of interest. For example, Mus musculus do not readily imitate sounds, a trait known as vocal learning and a feature of speech. In contrast, thousands of bird species exhibit this ability. The circuits and underlying molecular mechanisms appear similar between disparate avian orders and are shared with humans...
March 7, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28250800/vocal-exchanges-during-pair-formation-and-maintenance-in-the-zebra-finch-taeniopygia-guttata
#10
Pietro Bruno D'Amelio, Lisa Trost, Andries Ter Maat
BACKGROUND: Pair compatibility affects the success of a pair; however, its causes and mechanisms are not fully understood. Vocal exchange may be very important for pair formation, coordinating pair activities, maintaining the pair bond and mate guarding. To investigate the role of vocal exchange in pair formation and pair maintenance, we explored whether new and established pairs of zebra finches differed in their calling relationships. We used individualised backpack microphones to examine the entire daily vocal emission of pairs, with parallel video recording of behaviour...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28250467/automated-synaptic-connectivity-inference-for-volume-electron-microscopy
#11
Sven Dorkenwald, Philipp J Schubert, Marius F Killinger, Gregor Urban, Shawn Mikula, Fabian Svara, Joergen Kornfeld
Teravoxel volume electron microscopy data sets from neural tissue can now be acquired in weeks, but data analysis requires years of manual labor. We developed the SyConn framework, which uses deep convolutional neural networks and random forest classifiers to infer a richly annotated synaptic connectivity matrix from manual neurite skeleton reconstructions by automatically identifying mitochondria, synapses and their types, axons, dendrites, spines, myelin, somata and cell types. We tested our approach on serial block-face electron microscopy data sets from zebrafish, mouse and zebra finch, and computed the synaptic wiring of songbird basal ganglia...
February 27, 2017: Nature Methods
https://www.readbyqxmd.com/read/28240293/evolution-of-the-functionally-conserved-dcc-gene-in-birds
#12
Cedric Patthey, Yong Guang Tong, Christine Mary Tait, Sara Ivy Wilson
Understanding the loss of conserved genes is critical for determining how phenotypic diversity is generated. Here we focus on the evolution of DCC, a gene that encodes a highly conserved neural guidance receptor. Disruption of DCC in animal models and humans results in major neurodevelopmental defects including commissural axon defects. Here we examine DCC evolution in birds, which is of particular interest as a major model system in neurodevelopmental research. We found the DCC containing locus was disrupted several times during evolution, resulting in both gene losses and faster evolution rate of salvaged genes...
February 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28235893/single-neurons-in-the-avian-auditory-cortex-encode-individual-identity-and-propagation-distance-in-naturally-degraded-communication-calls
#13
Solveig C Mouterde, Julie E Elie, Nicolas Mathevon, Frédéric E Theunissen
One of the most complex tasks performed by sensory systems is "scene analysis": the interpretation of complex signals as behaviorally relevant objects. The study of this problem, universal to species and sensory modalities, is particularly challenging in audition, where sounds from various sources and localizations, degraded by propagation through the environment, sum to form a single acoustical signal. Here we investigated in a songbird model, the zebra finch, the neural substrate for ranging and identifying a single source...
February 24, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28229973/female-conspecifics-restore-rhythmic-singing-behaviour-in-arrhythmic-male-zebra-finches
#14
Neelu Anand Jha, Vinod Kumar
The present study investigated whether pairing with a conspecific female would restore rhythmicity in the singing behaviour of arrhythmic male songbirds. We recorded the singing and, as the circadian response indicator, monitored the activity-rest pattern in male zebra finches (Taeniopygia guttata) housed without or with a conspecific female under 12 h light: 12 h darkness (12L:12D) or constant bright light (LL bright). Both unpaired and paired birds exhibited a significant daily rhythm in the singing and activity behaviour, but paired birds, under 12L:12D, showed a ~2 h extension in the evening...
March 2017: Journal of Biosciences
https://www.readbyqxmd.com/read/28193855/bmp-signaling-controls-buckling-forces-to-modulate-looping-morphogenesis-of-the-gut
#15
Nandan L Nerurkar, L Mahadevan, Clifford J Tabin
Looping of the initially straight embryonic gut tube is an essential aspect of intestinal morphogenesis, permitting proper placement of the lengthy small intestine within the confines of the body cavity. The formation of intestinal loops is highly stereotyped within a given species and results from differential-growth-driven mechanical buckling of the gut tube as it elongates against the constraint of a thin, elastic membranous tissue, the dorsal mesentery. Although the physics of this process has been studied, the underlying biology has not...
February 28, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28188629/orthogonal-topography-in-the-parallel-input-architecture-of-songbird-hvc
#16
Kevin C Elliott, Wei Wu, Richard Bertram, Richard L Hyson, Frank Johnson
Neural activity within the cortical premotor nucleus HVC (acronym is name) encodes the learned songs of adult male zebra finches (Taeniopygia guttata). HVC activity is driven and/or modulated by a group of five afferent nuclei (the Medial Magnocellular nucleus of the Anterior Nidopallium, MMAN; Nucleus Interface, NIf; nucleus Avalanche, Av; the Robust nucleus of the Arcopallium, RA; the Uvaeform nucleus, Uva). While earlier evidence suggested that HVC receives a uniformly distributed and non-topographic pattern of afferent input, recent evidence suggests this view is incorrect (Basista et al...
February 11, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28170164/perineuronal-nets-and-vocal-plasticity-in-songbirds-a-proposed-mechanism-to-explain-the-difference-between-closed-ended-and-open-ended-learning
#17
Gilles Cornez, Farrah N Madison, Annemie Van der Linden, Charlotte Cornil, Kathleen M Yoder, Gregory F Ball, Jacques Balthazart
Perineuronal nets (PNN) are aggregations of chondroitin sulfate proteoglycans surrounding the soma and proximal processes of neurons, mostly GABAergic interneurons expressing parvalbumin. They limit the plasticity of their afferent synaptic connections. In zebra finches PNN develop in an experience-dependent manner in the song control nuclei HVC and RA (nucleus robustus arcopallialis) when young birds crystallize their song. Because songbird species that are open-ended learners tend to recapitulate each year the different phases of song learning until their song crystallizes at the beginning of the breeding season, we tested whether seasonal changes in PNN expression would be found in the song control nuclei of a seasonally breeding species such as the European starling...
February 7, 2017: Developmental Neurobiology
https://www.readbyqxmd.com/read/28167135/long-term-effects-of-adolescent-stress-on-neophobic-behaviors-in-zebra-finches-are-modulated-by-social-context-when-in-adulthood
#18
Michael G Emmerson, Karen A Spencer
Experiencing stress during adolescence can increase neophobic behaviors in adulthood, but most tests have been conducted in the absence of conspecifics. Conspecifics can modulate responses to stressors, for example by acting as 'social buffers' to attenuate the aversive appraisal of stressors. Here, we investigate the long-term effects of adolescent stress on the behavioral responses to novel stimuli (a mild stressor) across social contexts in an affiliative passerine bird, the zebra finch. During early (days 40-60) or late (days 65-85) adolescence the birds (n=66) were dosed with either saline or the hormone corticosterone (CORT)...
February 3, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28149319/effects-of-the-social-environment-during-adolescence-on-the-development-of-social-behaviour-hormones-and-morphology-in-male-zebra-finches-taeniopygia-guttata
#19
Stefanie Bölting, Nikolaus von Engelhardt
BACKGROUND: Individual differences in behaviour are widespread in the animal kingdom and often influenced by the size or composition of the social group during early development. In many vertebrates the effects of social interactions early in life on adult behaviour are mediated by changes in maturation and physiology. Specifically, increases in androgens and glucocorticoids in response to social stimulation seem to play a prominent role in shaping behaviour during development. In addition to the prenatal and early postnatal phase, adolescence has more recently been identified as an important period during which adult behaviour and physiology are shaped by the social environment, which so far has been studied mostly in mammals...
2017: Frontiers in Zoology
https://www.readbyqxmd.com/read/28143393/identification-and-evolutionary-analysis-of-long-non-coding-rnas-in-zebra-finch
#20
Chih-Kuan Chen, Chun-Ping Yu, Sung-Chou Li, Siao-Man Wu, Mei-Yeh Jade Lu, Yi-Hua Chen, Di-Rong Chen, Chen Siang Ng, Chau-Ti Ting, Wen-Hsiung Li
BACKGROUND: Long non-coding RNAs (lncRNAs) are important in various biological processes, but very few studies on lncRNA have been conducted in birds. To identify IncRNAs expressed during feather development, we analyzed single-stranded RNA-seq (ssRNA-seq) data from the anterior and posterior dorsal regions during zebra finch (Taeniopygia guttata) embryonic development. Using published transcriptomic data, we further analyzed the evolutionary conservation of IncRNAs in birds and amniotes...
January 31, 2017: BMC Genomics
keyword
keyword
86860
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"