Browse Items · NEOMED Bibliography Database

Fetal lung epithelial ion channels relocate in the cell membrane during late gestation.

Near the end of gestation, the direction of ion and fluid flow across the alveolar epithelium rapidly changes from secretion to absorption. Thus, the relative cell membrane location of epithelial Na channels (ENaCs) and cystic fibrosis transmembrane…

GABAergic and non-GABAergic projections to the superior colliculus from the auditory brainstem.

The superior colliculus (SC) contains an auditory space map that is shaped by projections from several subcortical auditory nuclei. Both GABAergic (inhibitory) and excitatory cells contribute to these inputs, but there are contradictory reports…

Cells in auditory cortex that project to the cochlear nucleus in guinea pigs.

Fluorescent retrograde tracers were used to identify the cells in auditory cortex that project directly to the cochlear nucleus (CN). Following injection of a tracer into the CN, cells were labeled bilaterally in primary auditory cortex and the…

Tags: 2006, Animals, Auditory Cortex/*cytology, Cochlear Nucleus/*cytology, Coomes Diana L, Department of Anatomy & Neurobiology, Fluorescent Dyes, Guinea Pigs, Journal of the Association for Research in Otolaryngology : JARO, NEOMED College of Medicine, Pyramidal Cells/*cytology, Schofield Brett R, Schofield Ryan M

Stimulation of distal airspace fluid clearance in guinea pigs involves bumetanide-sensitive ion transport.

OBJECTIVE: This study was undertaken to test the hypothesis that beta-adrenoceptor stimulation of fetal lung fluid absorption in near-term guinea pig fetuses involves bumetanide-sensitive ion transport. STUDY DESIGN: Fetuses were obtained from…

Projections from auditory cortex to cholinergic cells in the midbrain tegmentum of guinea pigs.

Anterograde and retrograde tracing techniques were used to characterize projections from the auditory cortex to the pedunculopontine and laterodorsal tegmental nuclei (PPT and LDT, respectively) in the midbrain tegmentum in guinea pigs. For…

Pathways from auditory cortex to the cochlear nucleus in guinea pigs.

The inferior colliculus (IC) and superior olivary complex (SOC) are important sources of descending pathways to the cochlear nucleus. The IC and SOC are also targets of direct projections from the auditory cortex but it is not known if cortical axons…

Projections from auditory cortex contact ascending pathways that originate in the superior olive and inferior colliculus.

The superior olivary complex (SOC) and inferior colliculus (IC) are targets of cortical projections as well as sources of major ascending auditory pathways. This study examines whether the cortical projections contact cells in the SOC or IC that…

Tags: 2007, Animals, Auditory Cortex/*cytology, Auditory Pathways/*cytology, Department of Anatomy & Neurobiology, Fluorescence, Guinea Pigs, Hearing research, Inferior Colliculi/*cytology, Microscopy, NEOMED College of Medicine, Olivary Nucleus/*cytology, Peterson Diana Coomes, Schofield Brett R, Staining and Labeling/methods

Cholinergic cells of the pontomesencephalic tegmentum: connections with auditory structures from cochlear nucleus to cortex.

Acetylcholine (ACh) is a neuromodulator that is likely to play a role in plasticity as well as other phenomena at many sites in the auditory system. The auditory cortex receives cholinergic innervation from the basal forebrain, whereas the cochlea…

Auditory cortical axons contact commissural cells throughout the guinea pig inferior colliculus.

Projections from auditory cortex (AC) affect how cells in both inferior colliculi (IC) respond to acoustic stimuli. The large projection from the AC to the ipsilateral IC is usually credited with the effects in the ipsilateral IC. The circuitry…

Tags: 2013, AC, Animals, auditory cortex, Auditory Cortex/*physiology, Auditory Pathways/cytology, Axons/metabolism/*pathology, Brain Mapping, cortical layers, Department of Anatomy & Neurobiology, Fast Blue, FB, FD, Female, FG, Fluor0Ruby, fluorescein dextran, Fluorescence, FluoroGold, FR, G-, G+, GAD, GAD-immunonegative, GAD-immunopositive, GAD-neg, gamma-Aminobutyric Acid/metabolism, GB, Glutamate Decarboxylase/metabolism, glutamic acid decarboxylase, green RetroBeads, Guinea Pigs, Hearing research, I-VI, IC, IC central nucleus, IC dorsal cortex, IC lateral cortex, IC rostral cortex, ICc, ICd, IClc, ICrc, Inferior Colliculi/pathology/*physiology, inferior colliculus, Male, Mesencephalon/pathology, Microscopy, Nakamoto Kyle T, NEOMED College of Medicine, ps, pseudosylvian sulcus, rhinal sulcus, rs, Schofield Brett R, Sowick Colleen S, white matter, wm

On the use of retrograde tracers for identification of axon collaterals with multiple fluorescent retrograde tracers.

A common method for identifying collateral projections is to inject different retrograde tracers into two targets and examine labeled cells for the presence of both tracers. Double-labeled cells are considered to have collateral projections to the…

Distribution of cholinergic cells in guinea pig brainstem.

We used an antibody to choline acetyltransferase (ChAT) to label cholinergic cells in guinea pig brainstem. ChAT-immunoreactive (IR) cells comprise several prominent groups, including the pedunculopontine tegmental nucleus, laterodorsal tegmental…

Tags: 2008, Animals, Brain Mapping, Brain Stem/anatomy & histology/*cytology, Choline O-Acetyltransferase/*metabolism, Department of Anatomy & Neurobiology, Guinea Pigs, Motts S D, NEOMED College of Medicine, Neurons/*metabolism, Neuroscience, Schofield B R, Slusarczyk A S, Sowick C S

Localization and function of NK(3) subtype tachykinin receptors of layer V pyramidal neurons of the guinea-pig medial prefrontal cortex.

The NK(3) subtype of tachykinin receptor has been implicated as a modulator of synaptic transmission in several brain regions, including the cerebral cortex. The localization and expression of NK(3) receptors within the brain vary from species to…

Tags: 2008, Animals, Autoradiography/methods, Dose-Response Relationship, Drug, Drug Interactions, Excitatory Amino Acid Antagonists/pharmacology, Excitatory Postsynaptic Potentials/drug effects/radiation effects, Guinea Pigs, In Vitro Techniques, Iodine Isotopes/pharmacokinetics, Male, Medd A M, Membrane Potentials/drug effects/physiology/radiation effects, Neurokinin B/analogs & derivatives/pharmacokinetics, Neurokinin-3/agonists/antagonists & inhibitors/*metabolism, Neuroscience, Patch-Clamp Techniques, Peptide Fragments/pharmacology, Prefrontal Cortex/*cytology, Protein Binding/drug effects, Pyramidal Cells/drug effects/*metabolism, Quinolines/pharmacology, Quinoxalines/pharmacology, Receptors, Simmons M A, Sobotka-Briner C D, Substance P/analogs & derivatives/pharmacology, Valine/analogs & derivatives/pharmacology

Projections to the inferior colliculus from layer VI cells of auditory cortex.

A large injection of a retrograde tracer into the inferior colliculus of guinea pigs labeled two bands of cells in the ipsilateral auditory cortex: a dense band of cells in layer V and a second band of cells in layer VI. On the contralateral side,…

Tags: 2009, Amidines/metabolism, Animals, Auditory Cortex/*cytology/*physiology, Cholera Toxin/metabolism, Department of Anatomy & Neurobiology, Efferent Pathways/physiology, Fluorescent Dyes/metabolism, Functional Laterality, Guinea Pigs, Inferior Colliculi/*physiology, NADPH Dehydrogenase/metabolism, NEOMED College of Medicine, Neurons/classification/*physiology, Neuroscience, Nitric Oxide Synthase Type I/metabolism, Schofield B R

Sources of cholinergic input to the inferior colliculus.

We combined retrograde tracing with immunohistochemistry for choline acetyltransferase to identify the source of cholinergic input to the inferior colliculus (IC) in guinea pigs. Injection of a retrograde tracer into one IC labeled cells in many…

Tags: 2009, Acetylcholine/*metabolism, Animals, Choline O-Acetyltransferase/metabolism, Department of Anatomy & Neurobiology, Female, Guinea Pigs, Immunohistochemistry, Inferior Colliculi/*anatomy & histology, Male, Motts S D, NEOMED College of Medicine, Neural Pathways/anatomy & histology/metabolism, Neuroscience, Pedunculopontine Tegmental Nucleus/anatomy & histology/metabolism, Photomicrography, Schofield B R, Tegmentum Mesencephali/*anatomy & histology/*metabolism

Projections from auditory cortex to midbrain cholinergic neurons that project to the inferior colliculus.

We have shown that auditory cortex projects to cholinergic cells in the pedunculopontine tegmental nucleus (PPT) and laterodorsal tegmental nucleus (LDT). PPT and LDT are the sources of cholinergic projections to the inferior colliculus, but it is…

Cholinergic cells in the tegmentum send branching projections to the inferior colliculus and the medial geniculate body.

The pontomesencephalic tegmentum (PMT) provides cholinergic input to the inferior colliculus (IC) and the medial geniculate body (MG). PMT cells are often characterized as projecting to more than one target. The purpose of this study was to determine…

Tags: 2011, Acetylcholine/metabolism, Animals, Auditory Pathways/*cytology, Department of Anatomy & Neurobiology, Female, Geniculate Bodies/*cytology, Guinea Pigs, Immunohistochemistry, Inferior Colliculi/*cytology, Male, Motts S D, NEOMED College of Medicine, Neurons/*cytology/metabolism, Neuroscience, Schofield B R, Tegmentum Mesencephali/*cytology

Multiple origins of cholinergic innervation of the cochlear nucleus.

Acetylcholine (Ach) affects a variety of cell types in the cochlear nucleus (CN) and is likely to play a role in numerous functions. Previous work in rats suggested that the acetylcholine arises from cells in the superior olivary complex, including…

Tags: *Cholinergic Fibers, 2011, Acetylcholine/metabolism, Animals, Auditory Pathways/*cytology/metabolism, Cochlear Nucleus/*anatomy & histology/metabolism, Department of Anatomy & Neurobiology, Guinea Pigs, Immunohistochemistry, Mellott J G, Motts S D, NEOMED College of Medicine, Neuroscience, Schofield B R

Analysis of excitatory synapses in the guinea pig inferior colliculus: a study using electron microscopy and GABA immunocytochemistry.

The inferior colliculus (IC) integrates ascending auditory input from the lower brainstem and descending input from the auditory cortex. Understanding how IC cells integrate these inputs requires identification of their synaptic arrangements. We…

Acute nicotine and phencyclidine increase locomotor activity of the guinea pig with attenuated potencies relative to their effects on rat or mouse.

Behavioral assays of the responses to psychomotor stimulants can be used to model certain aspects of CNS pathologies such as psychosis and addiction. However, species-dependent differences in the effects of neuromodulators in these assays can…

Tags: 2010, Animals, Dizocilpine Maleate/pharmacology, Excitatory Amino Acid Antagonists/pharmacology, Guinea Pigs, Hudzik Thomas J, Locomotion/*drug effects, Mice, Nicotine/*pharmacology, Pharmacology, biochemistry, and behavior, Phencyclidine/*pharmacology, Rats, Simmons Mark A, Werkheiser Jennifer L

A noninflammatory interleukin-1beta fragment stimulates fetal lung fluid absorption in guinea pigs.

We have previously demonstrated that full-length interleukin (IL)-1beta can induce and stimulate lung fluid absorption in near-term guinea pig fetuses via stimulation of fetal cortisol synthesis and release. To develop a potentially clinically useful…

IL-1beta stimulates alveolar fluid absorption in fetal guinea pig lungs via the hypothalamus-pituitary-adrenal gland axis.

We tested the hypothesis that interleukin (IL)-1beta-induced cortisol synthesis stimulates alveolar fluid clearance in preterm fetuses. IL-1beta was administered subcutaneously daily to timed-pregnant guinea pigs for 3 days with and without…

Oxytocin-induced labor augments IL-1beta-stimulated lung fluid absorption in fetal guinea pig lungs.

We tested the hypothesis that oxytocin-induced labor augmented

IL-1beta-induced cortisol stimulates lung fluid absorption in fetal guinea pigs via SGK-mediated Nedd4-2 inhibition.

We tested the hypothesis that interleukin (IL)-1beta-induced cortisol synthesis stimulates distal lung fluid absorption in fetal guinea pigs via induction of serum- and glucocorticoid-regulated kinase (SGK) and inhibition of neural precursor cell…

Responses in the inferior colliculus of the guinea pig to concurrent harmonic series and the effect of inactivation of descending controls.

One of the fundamental questions of auditory research is how sounds are segregated because, in natural environments, multiple sounds tend to occur at the same time. Concurrent sounds, such as two talkers, physically add together and arrive at the ear…

Tags: *Acoustic Stimulation, 2010, Action Potentials/physiology, Animal, Animals, Auditory Cortex/*physiology, Auditory Pathways/*physiology, Female, Guinea Pigs, Inferior Colliculi/*physiology, Journal of neurophysiology, Male, Models, Nakamoto Kyle T, Palmer Alan R, Pitch Perception/physiology, Shackleton Trevor M

A function for binaural integration in auditory grouping and segregation in the inferior colliculus.

Responses of neurons to binaural, harmonic complex stimuli in urethane-anesthetized guinea pig inferior colliculus (IC) are reported. To assess the binaural integration of harmonicity cues for sound segregation and grouping, responses were measured…

Tags: *Auditory Perception, 2015, Animals, Auditory, binaural integration, Evoked Potentials, Female, Guinea Pigs, harmonic complex, Inferior Colliculi/cytology/*physiology, inferior colliculus, Journal of neurophysiology, Magezi David A, Male, Nakamoto Kyle T, Neurons/physiology, Palmer Alan R, pitch, Shackleton Trevor M

Stimulation of MAP kinase pathways after maternal IL-1beta exposure induces fetal lung fluid absorption in guinea pigs.

BACKGROUND: We tested the hypothesis that maternal interleukin-1beta (IL-1beta) pretreatment and induction of fetal cortisol synthesis activates MAP kinases and thereby affects lung fluid absorption in preterm guinea pigs. METHODS: IL-1beta was…

Communication calls produced by electrical stimulation of four structures in the guinea pig brain.

One of the main central processes affecting the cortical representation of conspecific vocalizations is the collateral output from the extended motor system for call generation. Before starting to study this interaction we sought to compare the…

Tags: 2018, Acoustic Stimulation/methods, Animal/physiology, Animals, Auditory Perception/physiology, Brain/*physiology, Electric Stimulation/methods, Female, Green David B, Grimsley Jasmine M S, Guinea Pigs, Male, Neurons/physiology, Palmer Alan R, PloS one, Shackleton Trevor M, Vocalization, Wallace Mark N, Zobay Oliver

Extracellular Molecular Markers and Soma Size of Inhibitory Neurons: Evidence for Four Subtypes of GABAergic Cells in the Inferior Colliculus.

UNLABELLED: Inhibition plays an important role in shaping responses to stimuli throughout the CNS, including in the inferior colliculus (IC), a major hub in both ascending and descending auditory pathways. Subdividing GABAergic cells has furthered…

Lung fluid absorption is induced in preterm guinea pigs ventilated with low tidal volumes.

The objective of this study was to determine if low tidal volume (V(t)) ventilation was beneficial when ventilating preterm fetuses. The authors ventilated preterm guinea pig fetuses at gestation day (GD) 67, 3 days before birth, newborn, and…

Processing Of Communication Calls In Guinea Pig Auditory Cortex

Vocal communication is an important aspect of guinea pig behaviour and a large contributor to their acoustic environment. We postulated that some cortical areas have distinctive roles in processing conspecific calls. In order to test this hypothesis…

Perineuronal nets and subtypes of GABAergic cells differentiate auditory and multisensory nuclei in the intercollicular area of the midbrain.

The intercollicular region, which lies between the inferior and superior colliculi in the midbrain, contains neurons that respond to auditory, visual, and somatosensory stimuli. Golgi studies have been used to parse this region into three distinct…

Tags: 2020, ab_10807945, ab_141607, ab_2278725, ab_2336066, ab_2336132, ab_2336874, ab_2336875, ab_2336881, ab_2534012, ab_2535710, ab_2665454, ab_2735091, ascending projections, Beebe Nichole L, Department of Anatomy & Neurobiology, descending projections, dorsal column nuclei, efferent connections, external nucleus, extracellular-matrix, Guinea Pigs, inferior colliculus, intercollicular tegmentum, journalArticle, June 2020 Update II, lateral lemniscus, medial geniculate-body, NEOMED College of Medicine, Noftz William A, nucleus of the brachium of the inferior colliculus, rostral pole of the inferior colliculus, rrid, RRID: AB_10807945, RRID: AB_141607, RRID: AB_2278725, RRID: AB_2336066, RRID: AB_2336132, RRID: AB_2336874, RRID: AB_2336875, RRID: AB_2336881, RRID: AB_2534012, RRID: AB_2535710, RRID: AB_2665454, RRID: AB_2735091, RRID: SCR_001775, Schofield Brett R, scr_001775, superior colliculus, The Journal of comparative neurology, VGLUT2

Browse Items (31 total)