• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Formation of Neuronal Pathways in the lmaginal Discs of Drosophila
Formation of Neuronal Pathways in the lmaginal Discs of Drosophila

... 21 A4 stains all known sensory neurons as well as motor axons, and (2) the same neurons in the peripheral nervous system were stained when antibodies specific for HRP were used instead of MAb 2lA4; previous studies have shown that the antiperoxidase antibodies bind to all neuronal membranes in Droso ...
PINP: A New Method of Tagging Neuronal Populations
PINP: A New Method of Tagging Neuronal Populations

... Neural circuits are exquisitely organized, consisting of many different neuronal subpopulations. However, it is difficult to assess the functional roles of these subpopulations using conventional extracellular recording techniques because these techniques do not easily distinguish spikes from differ ...
Physiological and Morphological Analysis of Synaptic Transmission
Physiological and Morphological Analysis of Synaptic Transmission

... (DE), and cell 4 (VE) (Fig. 1). The notations of DI-I, VI-2, DE-3, and VE-4 are used to designate these identified motor neurons throughout this paper. Somata of leech swim motor neurons do not sustain overshooting impulses. Instead, remotely initiated impulses appear in somata recordings as small, ...
Accurate reconstruction of neuronal morphology
Accurate reconstruction of neuronal morphology

... (Sigma) by weight in 1M potassium acetate. This is about the limit in the amount of biocytin that can be dissolved in 1M potassium acetate, and slight warming may be required to get the substance fully dissolved. To fill a neuron, biocytin needs to be ejected with current pulses at the end of the re ...
Nervous Regulation
Nervous Regulation

... coordination of all life activities SACCONE IS THE COOLEST ...
Temperature Integration at the AC Thermosensory Neurons
Temperature Integration at the AC Thermosensory Neurons

... response at ⬃25°C (white bar) and during the second response at ⬃27°C (black bar). The circles show the peak temperatures of quickly heated to ⬃45°C using a CL-100 bipolar the experiments in each category. The number of circles represents the number of assays. Error bars are the SEM. The line graph ...
evolution of the first nervous systems ii
evolution of the first nervous systems ii

... multiple gene families, including the apparent absence of HOX genes, canonical microRNA machinery, and reduced immune complement in ctenophores. Although two distinct nervous systems are well-recognized in ctenophores, many bilaterian neuron-specific genes and genes of “classical” neurotransmitter p ...
Visual Motion-Detection Circuits in Flies: Small
Visual Motion-Detection Circuits in Flies: Small

... bombyliids, bee-flies; dolichopodids, long-legged flies; syrphids, hover flies; glossinids, tsetse flies; and calliphorids, blow flies. distilled water. The brains were dehydrated, embedded in soft Durcupan (Fluka, Mannheim, Germany), and serially sectioned at 30 mm. Reduced silver staining. Tissue ...
A Monosynaptic GABAergic Input from the Inferior Colliculus to the
A Monosynaptic GABAergic Input from the Inferior Colliculus to the

... Haberly, University of Wisconsin). A neuron’s membrane potential was calculated by subtracting the recorded intracellular voltage from the extracellular DC potential just after coming out of the cell. The input resistance of the cell was taken to be the slope of the linear portion of the current–vol ...
Signal Integration in Thalamus: Labeled Lines Go
Signal Integration in Thalamus: Labeled Lines Go

... This metaphor was originally used by Edward Lorenz in the context of non-linear models of weather prediction. It was meant not only to illustrate how seemingly small perturbations in inital conditions can lead to largely different results but also, and importantly, to point out that some chains of e ...
Histamine reduces firing and bursting of anterior and intralaminar
Histamine reduces firing and bursting of anterior and intralaminar

... This circadian rhythm suggests an involvement of histamine in normal regulation of sleep and waking periods. Furthermore, the hypothalamic suprachiasmatic nucleus known as circadian pacemaker is densely innervated by histaminergic fibers, and its neurons are predominantly activated by histamine acti ...
UNC-55, an Orphan Nuclear Hormone Receptor, Orchestrates
UNC-55, an Orphan Nuclear Hormone Receptor, Orchestrates

... unc-55 encodes a member of the nuclear hormone receptor superfamily The 1113 bp unc-55 cDNA encodes a predicted protein of 371 amino acids (Fig. 3). Comparison of the sequence of UNC-55 with other sequences in various databases indicated that UNC-55 belongs to the superfamily of nuclear hormone rece ...
category 1
category 1

... EEG records electrical activity along the scalp to map brain communication. PET imaging test w/ a radioactive substance to look for disease or injury in the brain. fMRI (functional MRI) detecting the changes in blood oxygenation and flow that occur in response to neural activity. ...
Histology of Normal Tissues - SM Group| Open Access eBooks
Histology of Normal Tissues - SM Group| Open Access eBooks

... The simple branched acinar gland consists of a single excretory duct and several secretory acini. The cells of secretory acini contain a central nucleus and vacuolar cytoplasm. As the secretion product builds up, the nucleus becomes pyknotic and the cytoplasm more vacuolar. The secretory product con ...
The Thalamic Projections of the Spinothalamic Tract
The Thalamic Projections of the Spinothalamic Tract

... particular synaptology of spinothalamic afferents in this particular zone. Concerning synaptology, Craig’s group reported that about 60% of labeled STT boutons in the VMpo exhibited a “triadic” arrangement with relay cell dendrites [7]. However, as commented above, previous work on STT terminals had ...
The Spinal Cord
The Spinal Cord

... more myelin than any other lamina • Some tract cells originate here, axons cross the midline and enter the contralateral Spinothalamic Tract, also sends contacts to layers II and III • Receives afferents from dorsal roots via the dorsal funiculus • At rostral end of spinal cord, laminas I-IV become ...
Document
Document

... more myelin than any other lamina • Some tract cells originate here, axons cross the midline and enter the contralateral Spinothalamic Tract, also sends contacts to layers II and III • Receives afferents from dorsal roots via the dorsal funiculus • At rostral end of spinal cord, laminas I-IV become ...
Andrea Kádár
Andrea Kádár

... TRH neurons are closely associated in the external zone of the ME. Therefore, we hypothesized that T3 produced by tanycytes may be taken up by axon terminals of these neurosecretory neurons in the ME and transported retrogradely to the nucleus of these cells. The presence of the main neuronal thyroi ...
Posterior White Column
Posterior White Column

... more myelin than any other lamina • Some tract cells originate here, axons cross the midline and enter the contralateral Spinothalamic Tract, also sends contacts to layers II and III • Receives afferents from dorsal roots via the dorsal funiculus • At rostral end of spinal cord, laminas I-IV become ...
Effect of Adrenalectomy on Miniature Inhibitory Postsynaptic
Effect of Adrenalectomy on Miniature Inhibitory Postsynaptic

... cosecretagogues released from the parvocellular neurons. CRH causes the release of adrenocorticotropin hormone from the pituitary, which in turn stimulates the secretion of corticosterone from the adrenal cortex (see Whitnall 1993). Corticosterone induces peripheral effects but also feeds back to th ...
Neuronal fiber tracts connecting the brain and ventral nerve cord of
Neuronal fiber tracts connecting the brain and ventral nerve cord of

... clones of neurons whose axon tracts crossed from the brain into the ventral nerve cord and vice versa furnished additional data. Finally, we took advantage of several Gal4 driver lines targeting subsets of ANs and DNs to visualize these fiber connections. Our data define groups of DNs located near dis ...
Wired for reproduction: Organization and Development of Sexually
Wired for reproduction: Organization and Development of Sexually

... initiates ovulation in female mammals (see Gerall & Givon 1992 for review). Treatment of ovariectomized adult female rats with estrogen causes a massive surge in LH secretion, yet similar treatments in males fail to induce a similar response. This sexually dimorphic response to hormone treatment can ...
Trigeminal pathways handout
Trigeminal pathways handout

... 1. Spinal (descending) trigeminal tract contains primary afferents that will synapse in spinal nucleus of V. The tract is continuous with the dorsolateral fasciculus (Lissauer’s tract) in the spinal cord, again emphasizing the similarities with the ALS system. 2. The Spinal (descending) nucleus exte ...
FIGURE LEGENDS FIGURE 40.1 Periodic activation in sleep cycles
FIGURE LEGENDS FIGURE 40.1 Periodic activation in sleep cycles

... are shown as red circles; postulated excitatory connections as green circles; and cholinergic pontine nuclei are shown as blue circles. It should be noted that the actual synaptic signs of many of the aminergic and reticular pathways remain to be demonstrated, and, in many cases, the neuronal archit ...
A Critical Review of the Role of the Proposed VMpo Nucleus in Pain
A Critical Review of the Role of the Proposed VMpo Nucleus in Pain

... that form a matrix zone in the VPL and Po nuclei in the region that receives the spinothalamic projection.71 The matrix zone stains only weakly for cytochrome oxidase, and the neurons here are immunonegative for parvalbumin staining. This matrix zone extends throughout the VPL and VPM nuclei and int ...
< 1 ... 60 61 62 63 64 65 66 67 68 ... 274 >

Circumventricular organs

Circumventricular organs (CVOs) are structures in the brain that are characterized by their extensive vasculature and lack of a normal blood brain barrier (BBB). The CVOs allow for the linkage between the central nervous system and peripheral blood flow; additionally they are an integral part of neuroendocrine function. The lack of a blood brain barrier allows the CVOs to act as an alternative route for peptides and hormones in the neural tissue to the peripheral blood stream, while still protecting it from toxic substances. CVOs can be classified into (a) sensory and (b) secretory organs. The sensory organs include the area postrema (AP), the subfornical organ (SFO) and the vascular organ of lamina terminalis. They have the ability to sense plasma molecules and then pass that information into other regions of the brain. Through this, they provide direct information to the autonomic nervous system from the systemic circulation. The secretory organs include the subcommissural organ (SCO), the posterior pituitary, the pineal gland, the median eminence and the intermediate lobe of the pituitary gland. These organs are responsible for secreting hormones and glycoproteins into the peripheral vascular system using feedback from both the brain environment and external stimuli.All of the circumventricular organs, besides the SCO, contain extensive vasculature and fenestrated capillaries which leads to a ‘leaky’ BBB at the site of the organs. Furthermore, all CVOs contain neural tissue, allowing them to play a role in the neuroendocrine system. It is highly debated if the choroid plexus can be included as a CVO. It has a high concentration of fenestrated capillaries, but its lack of neural tissue and its primary role of producing cerebrospinal fluid (CSF) usually excludes the choroid plexus from the CVO classification.Research has also linked CVOs to body fluid regulation, cardiovascular functions, immune responses, thirst, feeding behavior and reproductive behavior.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report