• 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
Primate Motor Cortex and Free Arm Movements to Visual
Primate Motor Cortex and Free Arm Movements to Visual

... to the change in the cell’s discharge rate associated with the particular direction of movement. The vector sum of these contributions is the outcome of the population code (the “neuronal population vector”) and points in the direction of movement in space well before the movement begins. Evidence w ...
How Is the Brain Organized?
How Is the Brain Organized?

... idea of how the nervous system functions, at least in a general way. That knowledge is the subject of this chapter. But before we turn our attention to the operation manual for the brain and the rest of the nervous system, let us examine what the brain is designed to do. Knowing the brain’s function ...
The Neurology of Music for Post-Traumatic-Stress
The Neurology of Music for Post-Traumatic-Stress

... Pharmaceutical. The most common pharmaceutical treatment for PTSD are antidepressants and selective serotonin reuptake inhibitors (SSRIs), a specific type of antidepressant. It is suggested that clients try physiological approaches for treatment before pharmaceutical. At times, symptoms of PTSD are ...
slides
slides

... – highly subjective to person experiencing it – pain of some type is the most frequent reason for physician consultation in the US, causing half of all Americans to seek medical care annually – pain that stops without treatment or responds to simple measures is called acute – pain is part of the bod ...
6 slides per sheet
6 slides per sheet

... to the differentiated state (adult neuron). 3. Neuronal induction requires specific contact between groups of cells; embryonic morphogenesis allows this to occur. 4. Positional information is created early by asymmetric distribution of molecules. These form axes (Animal/Veg, D/V, Ant/Post) that guid ...
Brainstem (II)
Brainstem (II)

... appear to contain biogenic amines – such cells number only in     the thousands……many of the cells containing these transmitters  are clustered together in a discrete region of the brain, the  brainstem.”                        ‐‐ Nicholls et al., From Neuron To Brain ...
File - Dr. Jerry Cronin
File - Dr. Jerry Cronin

... – Blood vessels link two capillary networks – Entire complex is portal system • Ensures that regulatory factors reach intended target cells before entering general circulation ...
Generation of Theta and Gamma Rhythms in the Hippocampus
Generation of Theta and Gamma Rhythms in the Hippocampus

... prominent during theta compared with non-theta behaviors. The oscillations were simulated by a systems model with recurrent inhibition. The model also predicts a behaviorally dependent inhibition, which was confirmed experimentally using paired-pulse responses. Paired-pulse facilitation (PPF) of the ...
Chemical Nature of Synaptic Transmission in Vertebrates
Chemical Nature of Synaptic Transmission in Vertebrates

... in the heart (cf. 334). When animal electricity was discovered and nerves were shown to be electrically excitable, it was natural to suspect that the “nerve fluid” might be identical with electricity (53 1, 840, 919). After all, the discharges of electric organs were indistinguishable from electrici ...
Efficient gene transduction of neurons by lentivirus with
Efficient gene transduction of neurons by lentivirus with

... was almost the same as that of CMV promoter at all the brain regions examined. These results lead to the conclusion that E/SYN promoter might be the most appropriate one to express a gene of interest in neurons efficiently and specifically. ...
Glycine Binding Sites of Presynaptic NMDA Receptors May
Glycine Binding Sites of Presynaptic NMDA Receptors May

... NMDA-Rs is a prerequirement for NMDA-R activation by glutamate (Kleckner and Dingledine 1988). Thus glycine and glutamate are co-agonists for NMDA-Rs. It is generally assumed that the glycine binding site is constantly saturated due to high concentrations of glycine in cerebrospinal fluid (CSF) (Fer ...
Virtual Fly Brain – under the hood.
Virtual Fly Brain – under the hood.

... cell body ...
Synapse
Synapse

... Such synaptic changes in 5-HT, however, are significantly smaller than those observed for DA, especially in brain circuits (e.g., the striatum) implicated in motor activity and arousal (Bradberry et al., 1993). The prevailing view, therefore, is that cocaethylene produces a differential effect on do ...
Assembly and Function of Spinal Circuits for Motor Control
Assembly and Function of Spinal Circuits for Motor Control

... transcription factors. Recent evidence indicates that repressive interactions among these factors lead to a stable memory of Shh signaling (Balaskas et al. 2012). These intrinsic repressive networks establish and maintain sharp boundaries between progenitor domains and ensure the production of defin ...
The continuous performance test: a window on
The continuous performance test: a window on

... limbic system. The involvement of the limbic system as well as the medial and dorsolateral frontal cortex is seen as resulting from their respective inputs into the association areas, which in turn impact on the inferior parietal lobes to inhibit or facilitate attentional response. The posterior par ...
Brainstem (II)
Brainstem (II)

... appear to contain biogenic amines – such cells number only in the thousands……many of the cells containing these transmitters are clustered together in a discrete region of the brain, the brainstem.” -- Nicholls et al., From Neuron To Brain ...
Down - 서울대 : Biointelligence lab
Down - 서울대 : Biointelligence lab

... (C) 2010, SNU Biointelligence Lab, http://bi.snu.ac.kr/ ...
Balanced Excitatory and Inhibitory Inputs to Cortical Neurons
Balanced Excitatory and Inhibitory Inputs to Cortical Neurons

... where T represents the ISI, ␰ denotes the firing rate, and ⌫(␬) is the gamma function. The gamma process is a natural extension of the conventional Poisson process, with the shape parameter ␬ measuring the irregularity of spike trains. When ␬ ⫽ 1, the ISI distribution becomes an exponential distribu ...
Supranuclear control of ocular motility
Supranuclear control of ocular motility

... collaboration of vestibular and visually mediated mechanisms. Vestibulo-ocular reflexes operate during locomotion, generating compensatory eye movements to counteract high-frequency head perturbations that occur with each step. One remarkable property of vestibulo-ocular reflexes is their short late ...
A population density approach that facilitates slow inhibitory synapses
A population density approach that facilitates slow inhibitory synapses

... A previously developed method for efficiently simulating complex networks of integrate-andfire neurons was specialized to the case in which the neurons have fast unitary postsynaptic conductances. However, inhibitory synaptic conductances are often slower than excitatory for cortical neurons, and th ...
View PDF - MRC Brain Network Dynamics Unit
View PDF - MRC Brain Network Dynamics Unit

... sampled at 400 Hz. All biopotentials were digitized on-line with a PC running Spike2 acquisition and analysis software (version 4; Cambridge Electronic Design, Cambridge, UK). Data from the recording session were first scrutinized for ECG and respiration artifacts. LFP data contaminated with ECG art ...
Pre-synaptic Terminal Dynamics in the Hippocampus
Pre-synaptic Terminal Dynamics in the Hippocampus

... In kittens, using monocular deprivation Hubel and Wiesel found that lack of visual experience during early development, but not after this critical period, leads to permanent alteration in perceptual capabilities later in life. These behavioural changes are accompanied by morphological and physiolog ...
Outputs of Radula Mechanoafferent Neurons in Aplysia are
Outputs of Radula Mechanoafferent Neurons in Aplysia are

... function of other sensory inputs or of the state of motor systems that generate behavior. A form of sensory modulation was investigated in the Aplysia feeding system at the level of a radula mechanoafferent neuron (B21) that provides chemical synaptic input to a group of motor neurons (B8a/b, B15) t ...
Glossary of Olfactory Terms
Glossary of Olfactory Terms

... type join in sets of fiber bundles through which these signals are transmitted. At the olfactory bulb, these signals are interpreted at the glomeruli and further signals are transmitted to the olfactory centers of the brain (see also limbic system). ...
Neurobiology of injury to the developing brain.
Neurobiology of injury to the developing brain.

... Following traumatic brain injury (TBI) there is significant neuropathology which includes mitochondrial dysfunction, loss of cortical grey matter, microglial activation, and cognitive impairment. Previous evidence has shown that activation of the peroxisome proliferatoractivated receptors (PPARs) pr ...
< 1 ... 33 34 35 36 37 38 39 40 41 ... 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