• 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
rapid eye movement sleep deprivation induces acetylcholinesterase
rapid eye movement sleep deprivation induces acetylcholinesterase

... Fig. 2. Comparison of AchE activity between control and experimental animals in the preoptic area. A: Cresyl violet-stained section representing the preoptic area; B: AchE reactivity in the preoptic area in control animals. A few AchE-positive neurons were detected in this region; C: A considerable ...
a14a NeuroPhysI
a14a NeuroPhysI

... • Specialized for the release and reception of neurotransmitters • Typically composed of two parts o Axon terminal of the presynaptic neuron, which contains synaptic vesicles o Receptor region on the postsynaptic neuron ...
In a galaxy not too far away - Utrecht University Repository
In a galaxy not too far away - Utrecht University Repository

... including but not limited to: spatial memory, spatial properties of episodic memory, recollection and temporal order of events (Bird & Burgess, 2008; Eichenbaum, Yonelinas, Ranganath, 2007; Eichenbaum, 2013). However, as Tulving already stated, it is not fruitful to identify particular memories as b ...
1 • In the animals of highly developed organization consisting of
1 • In the animals of highly developed organization consisting of

... where axon hillock is conspicuous ( arrow ). The cell body is tightly enclosed by mantle cells. As the axon divides into two branches, shortly after the departure, and the one runs to the periphery arriving at the sensory terminal organs, the other comes into the spinal cord as the dorsal root fiber ...
Synaptic Transmission and Neurotransmitters
Synaptic Transmission and Neurotransmitters

... – Several specific kinds- each act on certain neurons – Most neurons respond to and release one kind of neurotransmitter ...
Ajna Light Theory and Science Guy Harriman June 2015 The Ajna
Ajna Light Theory and Science Guy Harriman June 2015 The Ajna

... channels. These channels resembe the phototransduction cascade of invertebrate more than vertebrate photoreceptors. In addition, ipRGCs convey contrast (irradiance) information via the optic nerve to influence several functions. These nerve cell's dendrites are either shared or run alongside the opt ...
Introduction to Psychology
Introduction to Psychology

... Distinguish between absolute and difference thresholds. Discuss research finding on subliminal stimulation. Describe the phenomenon of sensory adaptation and explain its functional value. Explain the visual process, including the stimulus input, the structure of the eye, and the transduction of ligh ...
1 The Brain and Behavior
1 The Brain and Behavior

... Two Opposing Views Have Been Advanced on the Relationship Between Brain and Behavior Our current views about nerve cells, the brain, and behavior have emerged over the last century from a convergence of five experimental traditions: anatomy, embryology, physiology, pharmacology, and psychology. Befo ...
Effect of varying neurons in the hidden layer of neural
Effect of varying neurons in the hidden layer of neural

... feedforward neural network. Feed-forward networks have the following characteristics: 1. Perceptrons are arranged in layers, with the first layer taking in inputs and the last layer producing outputs. The middle layers have no connection with the external world, and hence are called hidden layers. 2 ...
Chapter 5 Learning to attend in primary visual cortex
Chapter 5 Learning to attend in primary visual cortex

... each day. A trial started as soon as the monkey’s eye position was within a 1.2°×1.2° square window centered on a red fixation point (FP in Fig. 1a). After an interval of 300 ms, the stimulus appeared on the screen. It consisted of two curves starting at two different small icons. The monkey was pre ...
OTTO LOEWI
OTTO LOEWI

... idea that the transmission should be electrical, just like the propagation wave along the axon. It was actually making sense to imagine electrical synapses. Unfortunately there were three important arguments against such simple picture of the nervous system. The first is the unidirectional flow of i ...
Uncinate Fasciculus
Uncinate Fasciculus

... •  During  a  go/no-­‐go  task,  neurons  had   differenOal  responses  to  whether  a  sOmulus   indicated  reward   •  Reversing  the  sOmuli  indicated  that  some   neurons  were  linked  to  sensory  features  of   sOmuli,  some  to  th ...
NA EXAM 3 (May 2001)
NA EXAM 3 (May 2001)

... There are two pathways for the projections from the basal ganglia output nuclei to the thalamus. The ansa lenticularis is the longer pathway that courses inferior to and around the posterior limb of the internal capsule, on its way to various thalamic targets. It can only been seen in one oblique se ...
Afferents of dopamine neurons
Afferents of dopamine neurons

... Figure 4. Effect of dopamine on corticostriatal synapses. Effect of dopamine on activitydependent synaptic plasticity in the corticostriatal pathway. A. A conjunction of cortical presynaptic activity and striatal postsynaptic activity, leads to long-term depression (LTD) in the absence of a dopamine ...
storyboards
storyboards

... The global pallidus external then sends a signal to the subthalamic nucleus. ...
Missed connections: photoreceptor axon seeks target neuron for
Missed connections: photoreceptor axon seeks target neuron for

... Each of the 800 ommatidia of the Drosophila compound eye contains 8 photoreceptor cells, which project their axons directly into the brain in a retinotopic manner. The outer photoreceptors R1–R6 all express the same Rhodopsin and project into the first optic neuropil, the lamina, which mediates imag ...
- Wiley Online Library
- Wiley Online Library

... MAP2, in the human embryo during human embryonic days 20–32, suggesting that Rufy3 might be expressed in the human developing nervous system (Figure S1) (Fang et al. 2010). In addition, its ortholog was detected in the rat brain (Mori et al. 2007). However, its temporal and spatial expression patter ...
PDF Format
PDF Format

... RE nucleus (Steriade et al. 1985) and absence of a priming role in spindling as assessed by direct recording of localcircuit thalamic neurons (Bal et al. 1995 ) . We asked the following questions. 1) Is the slow oscillation present in the thalamus after massive ipsilateral decortication and callosal ...
The Autonomic Nervous System
The Autonomic Nervous System

... p. 429, Tables 13.3, 13.4, 13.5 The ANS is structurally divided into two divisions by the location of the origin of the preganglionic neurons. 1. Sympathetic - Thoracolumbar – Preganglionic nerve cell body in lateral horn T1-L2 2. Parasympathetic - Craniosacral – Preganglionic nerve cell body in bra ...
Technical description of GSoC project 14
Technical description of GSoC project 14

... The aim of this project is to make neurons in MOOSE using a similar format as used by BRIAN (briansimulator.org). This is exciting because MOOSE provides powerful capabilities for single-neuron and subcellular modeling, whereas BRIAN is designed for rapid network modeling. Thus the project will grea ...
10 - Computing and Cybernetics in the Soviet Union.pptx
10 - Computing and Cybernetics in the Soviet Union.pptx

... it does not permit the integration of input and output necessary for the performance of a predictive reaction of the third or fourth order. Indeed, it is possible that one of the features of the discontinuity of behavior observable when comparing humans with other high mammals may lie in that the ot ...
Real-time tomography from magnetoencephalography (MEG
Real-time tomography from magnetoencephalography (MEG

... An ambiguity of a different kind is encountered when the data are heavily processed. Averaging and filtering are two powerful pre-processing operations that however lead to huge loss of information some of critical importance for the interpretation of the results. It is believed that by heavy filter ...
A GPU-accelerated cortical neural network model for visually guided
A GPU-accelerated cortical neural network model for visually guided

... to eight different directions of motion (in 45° increments) at a speed of 1.5 pixels per frame. We interpreted these activity values as neuronal mean firing rates, which were scaled to match the contrast sensitivity function of V1 complex cells (see Beyeler et al., 2014). Based on these mean firing ...
Sensory Afferent Neurotransmission in Caudal Nucleus Tractus
Sensory Afferent Neurotransmission in Caudal Nucleus Tractus

... types of calcium channels are present in the baroreceptor and other sensory neuron soma. A small component of the total calcium current is contributed by a low threshold T-type channel Caj (Andresen and Kunze, 1994). High threshold calcium current is present in unidentified sensory soma (Andresen an ...
Non-Cell-Autonomous Effect of Human SOD1G37R
Non-Cell-Autonomous Effect of Human SOD1G37R

... activation of microglia and astrocytes (Boillee et al., 2006). Misfolded SOD1 can increase oxidative stress and secretion of proinflammatory toxic factors by glial cells such as nitric oxide (NO), amplifying the disease symptoms (Barbeito et al., 2004). Recent data suggest that the increase in the p ...
< 1 ... 180 181 182 183 184 185 186 187 188 ... 554 >

Feature detection (nervous system)

Feature detection is a process by which the nervous system sorts or filters complex natural stimuli in order to extract behaviorally relevant cues that have a high probability of being associated with important objects or organisms in their environment, as opposed to irrelevant background or noise. Feature detectors are individual neurons – or groups of neurons – in the brain which code for perceptually significant stimuli. Early in the sensory pathway feature detectors tend to have simple properties; later they become more and more complex as the features to which they respond become more and more specific. For example, simple cells in the visual cortex of the domestic cat (Felis catus), respond to edges – a feature which is more likely to occur in objects and organisms in the environment. By contrast, the background of a natural visual environment tends to be noisy – emphasizing high spatial frequencies but lacking in extended edges. Responding selectively to an extended edge – either a bright line on a dark background, or the reverse – highlights objects that are near or very large. Edge detectors are useful to a cat, because edges do not occur often in the background “noise” of the visual environment, which is of little consequence to the animal.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report