Search Results - "Brian J. Norris"

Output variability across animals and levels in a motor system by Wenning, Angela, Norris, Brian J, Günay, Cengiz, Kueh, Daniel, Calabrese, Ronald L

“…Rhythmic behaviors vary across individuals. We investigated the sources of this output variability across a motor system, from the central pattern generator…”
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The neural control of heartbeat in invertebrates by Calabrese, Ronald L, Norris, Brian J, Wenning, Angela

“…Highlights • The cardiac ganglion reveals homeostatic mechanisms regulating electrical activity. • The leech heartbeat system can be studied at all levels from…”
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A role for compromise: synaptic inhibition and electrical coupling interact to control phasing in the leech heartbeat CpG by Weaver, Adam L, Roffman, Rebecca C, Norris, Brian J, Calabrese, Ronald L

“…How can flexible phasing be generated by a central pattern generator (CPG)? To address this question, we have extended an existing model of the leech heartbeat…”
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The neuromuscular transform in a single segment of a segmented heart tube by Wenning, Angela, Chang, Young Rim, Norris, Brian J., Calabrese, Ronald L.

“…Moving blood through the segmented heart tubes of leeches requires sequential constrictions driven by motor neurons controlled by a central pattern generator…”
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Animal-to-animal variability of connection strength in the leech heartbeat central pattern generator by Roffman, Rebecca C, Norris, Brian J, Calabrese, Ronald L

“…The heartbeat central pattern generator (CPG) in medicinal leeches controls blood flow within a closed circulatory by programming the constrictions of two…”
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Constancy and variability in the output of a central pattern generator by Norris, Brian J, Wenning, Angela, Wright, Terrence Michael, Calabrese, Ronald L

“…Experimental and corresponding modeling studies have demonstrated a twofold to fivefold variation of intrinsic and synaptic parameters across animals, whereas…”
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Variation in motor output and motor performance in a centrally generated motor pattern by Wenning, Angela, Norris, Brian J, Doloc-Mihu, Anca, Calabrese, Ronald L

“…Central pattern generators (CPGs) produce motor patterns that ultimately drive motor outputs. We studied how functional motor performance is achieved,…”
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Coping with Variability in Small Neuronal Networks by Calabrese, Ronald L, Norris, Brian J., Wenning, Angela, Wright, Terrence M.

“…Experimental and corresponding modeling studies indicate that there is a 2- to 5-fold variation of intrinsic and synaptic parameters across animals while…”
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Bringing up the rear: new premotor interneurons add regional complexity to a segmentally distributed motor pattern by Wenning, Angela, Norris, Brian J, Doloc-Mihu, Anca, Calabrese, Ronald L

“…Central pattern generators (CPGs) pace and pattern many rhythmic activities. We have uncovered a new module in the heartbeat CPG of leeches that creates a…”
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A Central Pattern Generator Producing Alternative Outputs: Pattern, Strength, and Dynamics of Premotor Synaptic Input to Leech Heart Motor Neurons by Norris, Brian J, Weaver, Adam L, Wenning, Angela, Garcia, Paul S, Calabrese, Ronald L

“…1 Department of Biology, Emory University, Atlanta, Georgia; and 2 Department of Biological Sciences, California State University, San Marcos, California…”
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A Central Pattern Generator Producing Alternative Outputs: Phase Relations of Leech Heart Motor Neurons With Respect to Premotor Synaptic Input by Norris, Brian J, Weaver, Adam L, Wenning, Angela, Garcia, Paul S, Calabrese, Ronald L

“…1 Department of Biology, Emory University, Atlanta, Georgia; and 2 Department of Biological Sciences, California State University, San Marcos, California…”
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A Central Pattern Generator Producing Alternative Outputs: Temporal Pattern of Premotor Activity by Norris, Brian J, Weaver, Adam L, Morris, Lee G, Wenning, Angela, Garcia, Paul A, Calabrese, Ronald L

“…1 Department of Biology, Emory University, Atlanta, Georgia; and 2 Department of Biological Sciences, California State University, San Marcos, California…”
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Different Proctolin Neurons Elicit Distinct Motor Patterns from a Multifunctional Neuronal Network by Blitz, Dawn M, Christie, Andrew E, Coleman, Melissa J, Norris, Brian J, Marder, Eve, Nusbaum, Michael P

“…Distinct motor patterns are selected from a multifunctional neuronal network by activation of different modulatory projection neurons. Subsets of these…”
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Characterization of Notch-class gene expression in segmentation stem cells and segment founder cells in Helobdella robusta (Lophotrochozoa; Annelida; Clitellata; Hirudinida; Glossiphoniidae) by Rivera, Ajna S., Gonsalves, Foster C., Song, Mi Hye, Norris, Brian J., Weisblat, David A.

“…Summary To understand the evolution of segmentation, we must compare segmentation in all three major groups of eusegmented animals: vertebrates, arthropods,…”
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Modeling the output of a central pattern generator by Calabrese, Ronald L, García, Paul S, Norris, Brian J, Wright, Terrence M

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RFamide Peptides in the Leech, Hirudo medicinalis by Calabrese, Ronald L., Brian J. Norris

“…RFamide peptides have been localized to a number of neurons of the CNS of the leech, Hirudo medicinalis, using immunocytochemical techniques. The majority of…”
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Pyloric motor pattern modification by a newly identified projection neuron in the crab stomatogastric nervous system by Norris, B J, Coleman, M J, Nusbaum, M P

“…1. We have used multiple, simultaneous intra- and extracellular recordings as well as Lucifer yellow dye-fills to identify modulatory commissural neuron 5…”
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Identification of motor neurons that contain a FMRFamidelike peptide and the effects of FMRFamide on longitudinal muscle in the medicinal leech, Hirudo medicinalis by Norris, B J, Calabrese, R L

“…Excitatory motor neurons in the leech are cholinergic. By using a combination of intracellular Lucifer yellow injection and indirect immunofluorescence, we…”
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Action of FMRFamide on longitudinal muscle of the leech, Hirudo medicinalis by NORRIS, B. J, CALABRESE, R. L

“…1. Nerve terminals associated with longitudinal muscle in the leech show FMRFamide-like immunoreactivity. 2. Structure-activity studies using FMRFamide analogs…”
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