Browse Items · NEOMED Bibliography Database

A 10-fr Ultrasound Catheter With Integrated Micromotor For 4-d Intracardiac Echocardiography

We developed prototype real-time 3-D intracardiac echocardiography catheters with integrated micromotors, allowing internal oscillation of a low-profile 64-element, 6.2-MHz phased-array transducer in the elevation direction. Components were designed…

Hyperpolarizing And Depolarizing Gaba-a Receptor-mediated Dendritic Inhibition In Area Ca1 Of The Rat Hippocampus

1. Gamma-aminobutyric acid(A) (GABA(A)) receptor-mediated inhibition of pyramidal neuron dendrites was studied in area CA1 of the rat hippocampal slice preparation with the use of intracellular and extracellular recording and one-dimensional current…

Tags: 1991, activity-dependent disinhibition, Borroni A M, cortical-neurons, Depression, Electrophysiology, gamma-aminobutyric acid, Grover L M, Journal Article or Conference Abstract Publication, Journal of neurophysiology, lacunosum-moleculare interneurons, Lambert N A, morphology, Neurosciences & Neurology, Physiology, pyramidal cells-invitro, responses, Teyler T J, voltage-clamp

Laminar Pattern Of Synaptic Activity In Rat Primary Visual-cortex - Comparison Of In-vivo And In-vitro Studies Employing The Current Source Density Analysis

In the present study we employed current source density analysis to study the major excitatory/inhibitory pathways in rat primary visual cortex in vivo and in vitro. A natural photic stimulus was used in vivo and served as a baseline for…

Identification And Ablation Of Dormant Conduction In Atrial Fibrillation Using Adenosine

Metabotropic glutamate receptor antagonist, (R,S)-alpha-methyl-4-carboxyphenyglycine, blocks two distinct forms of long-term potentiation in area CA1 of rat hippocampus.

The necessity of metabotropic glutamate receptors (mGluRs) in the induction of long-term potentiation (LTP) has recently been questioned. We examined the effect of (R,S)-alpha-methyl-4-caboxyphenylglycine (MCPG), a selective mGluR antagonist, on two…

Tags: 1995, Animals, Benzoates/*pharmacology, Calcium Channels/drug effects/metabolism/physiology, Electric Stimulation, Electrophysiology, Excitatory Amino Acid Antagonists/*pharmacology, Glycine/*analogs & derivatives/pharmacology, Grover L M, Hippocampus/drug effects/*physiology, In Vitro Techniques, Ion Channel Gating/drug effects, Little Z, Long-Term Potentiation/*drug effects, Metabotropic Glutamate/*antagonists & inhibitors, Neuroscience letters, Rats, Receptors, Teyler T J

Aspartame exposure and in vitro hippocampal slice excitability and plasticity.

Aspartame (APM) is a low-calorie sweetener recently approved and released for widespread use in the United States. However, concerns still exist that APM consumption may be responsible for adverse neurological and psychological effects in some…

Tags: 1988, Animals, Aspartame/*toxicity, Dipeptides/*toxicity, Electric Stimulation, Electrophysiology, Female, Fountain S B, Fundamental and applied toxicology : official journal of the Society of Toxicology, Hennes S K, Hippocampus/*drug effects/physiopathology, Neuronal Plasticity/*drug effects, Neurons/drug effects, Rats, Teyler T J, Time Factors

A slice preparation preserving the callosal projection to contralateral visual cortex.

Due to the curved path they follow, the visual callosal projections to areas OC1 and OC2 of the rat visual cortex have been inaccessible to studies using brain slices. In this paper we describe a new slice preparation in which a curved cutting blade…

Tags: *Synaptic Transmission, 1990, Animals, Berry R L, Corpus Callosum/*physiology, Electrophysiology, Female, In Vitro Techniques, Inbred Strains, Journal of neuroscience methods, Male, Neurology/instrumentation, Nowicky A, Rats, Teyler T J, Visual Cortex/*physiology

Developmental hearing loss impairs signal detection in noise: putative central mechanisms.

Listeners with hearing loss have difficulty processing sounds in noisy environments. This is most noticeable for speech perception, but is reflected in a basic auditory processing task: detecting a tonal signal in a noise background, i.e.,…

Tags: 2014, auditory cortex, conductive hearing loss, Department of Anatomy & Neurobiology, Electrophysiology, Frontiers in systems neuroscience, Galazyuk Alexander V, Gay Jennifer D, gerbil, intracellular, masking, NEOMED College of Medicine, Noise, Rosen Merri J, signal detection, Voytenko Sergiy V

Roles of inhibition in complex auditory responses in the inferior colliculus: inhibited combination-sensitive neurons.

We studied the functional properties and underlying neural mechanisms associated with inhibitory combination-sensitive neurons in the mustached bat's inferior colliculus (IC). In these neurons, the excitatory response to best frequency tones was…

Intracellular recording reveals temporal integration in inferior colliculus neurons of awake bats.

The central nucleus of the inferior colliculus (IC) is a major integrative center in the central auditory system. It receives information from both the ascending and descending auditory pathways. To determine how single IC neurons integrate…

Tags: 2007, Acoustic Stimulation, Animals, Chiroptera/*physiology, Data Interpretation, Department of Anatomy & Neurobiology, Electrophysiology, Excitatory Postsynaptic Potentials/physiology, Galazyuk A V, Inferior Colliculi/cytology/*physiology, Inhibitory Postsynaptic Potentials/physiology, Journal of neurophysiology, Microelectrodes, NEOMED College of Medicine, Neurons/*physiology, Pitch Perception, Statistical, Voytenko S V

Specificity of metabotropic glutamate receptor 2 coupling to G proteins.

Metabotropic glutamate receptor 2 (mGluR2) is a class 3 G protein-coupled receptor and an important mediator of synaptic activity in the central nervous system. Previous work demonstrated that mGluR2 couples to pertussis toxin (PTX)-sensitive G…

The effects of anticonvulsant drugs on NMDA-EPSP, AMPA-EPSP, and GABA-IPSP in the rat hippocampus.

The effects of phenobarbital, phenytoin, and valproic acid on pharmacologically isolated NMDA-EPSP, AMPA-EPSP, and GABA-IPSPs were examined in rat hippocampal slices. Phenobarbital (0.05 mg/ml) had no effect on the NMDA-EPSP, but decreased the slope…

Tags: 1997, alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid/*pharmacology, Animals, Anticonvulsants/*pharmacology, Brain research bulletin, Brown-Croyts L M, Electrophysiology, gamma-Aminobutyric Acid/*pharmacology, Hippocampus/*drug effects/physiology, Inbred Strains, Ko G Y, Male, N-Methylaspartate/*pharmacology, Phenobarbital/pharmacology, Phenytoin/pharmacology, Rats, Teyler T J, Valproic Acid/pharmacology

Tachykinin peptide-induced activation and desensitization of neurokinin 1 receptors.

The actions of four tachykinins on inhibition and desensitization of the

Tags: 2003, Amino Acid Sequence, Animals, Bennett V J, CHO Cells, Cricetinae, Down-Regulation/*drug effects, Electrophysiology, Ligands, Neurokinin-1/*agonists/*metabolism, Peptides, Perrine S A, Potassium/metabolism, Protein Binding, Rana catesbeiana, Receptors, Simmons M A, Tachykinins/chemistry/*pharmacology

Epileptic-like activity induces multiple forms of plasticity in hippocampal area CA1.

Mesial temporal lobe epilepsy is a relatively common form of epilepsy that afflicts many thousands of people. It has been suggested that the development of primary and secondary foci may involve mechanisms similar to long-term potentiation (LTP). In…

Tags: *Neuronal Plasticity, 2001, Animals, Brain research, Calcium Channels, Electrophysiology, Epilepsy/chemically induced/*physiopathology, Hippocampus/*physiopathology, Ion Channels/physiology, L-Type/physiology, Long-Evans, Long-Term Potentiation/physiology, Morgan S L, N-Methyl-D-Aspartate/metabolism, Potassium Chloride, Rats, Receptors, Synapses/physiology, Teyler T J

Canertinib induces ototoxicity in three preclinical models.

Neuregulin-1 (NRG1) ligand and its epidermal growth factor receptor (EGFR)/ERBB family regulate normal cellular proliferation and differentiation in many tissues including the cochlea. Aberrant NRG1 and ERBB signaling cause significant hearing…

Prenatal cocaine exposure leads to enhanced long-term potentiation in region CA1 of hippocampus.

Cocaine use by pregnant women is currently of concern for its social and economic impact. Clinical studies of cocaine exposed offspring are limited by methodological constraints. In this study we used a rabbit model to examine the effects of…

Tags: *Prenatal Exposure Delayed Effects, 1996, Animals, Brain research. Developmental brain research, Cocaine/*administration & dosage/pharmacology, Electrophysiology, Female, Hippocampus/*drug effects/physiology, In Vitro Techniques, Little J Z, Long-Term Potentiation/*drug effects, Narcotics/*administration & dosage/pharmacology, Neuronal Plasticity/drug effects, Pregnancy, Rabbits, Reference Values, Synapses/drug effects, Teyler T J

Responses to combinations of tones in the nuclei of the lateral lemniscus.

Combination-sensitive neurons integrate specific spectral and temporal elements in biologically important sounds, and they may underlie the analysis of biosonar and social vocalizations. Combination-sensitive neurons are found in the forebrain of a…

Tags: 2001, Acoustic Stimulation/methods, Animals, Auditory Pathways/*physiology, Brain Stem/*physiology, Chiroptera, College of Anatomy & Neurobiology, Department of Anatomy & Neurobiology, Electrophysiology, Journal of the Association for Research in Otolaryngology : JARO, NEOMED College of Medicine, Neurons/physiology, Portfors C V, Reaction Time/physiology, Wenstrup J J

Depotentiation of vdccLTP requires NMDAR activation.

Long-term potentiation is an enduring increase in synaptic efficacy following repeated stimulation of afferent fibers that is thought to underlie memory. In area CA1 of the hippocampus at least two forms of synaptic potentiation coexist at the same…

Presynaptic mechanism for heterosynaptic, posttetanic depression in area CA1 of rat hippocampus.

Conditioning stimulation applied to afferent fibers in stratum radiatum or stratum oriens of hippocampal area CA1 produced heterosynaptic, posttetanic depression (PTD) of excitatory postsynaptic potentials (EPSPs). PTD amounted to a

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