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Spinal Cord - Sydney University Medical Society
Spinal Cord - Sydney University Medical Society

... The different types of sensory information are Tactile (i.e. touch / vibration), Proprioception (i.e. position) and Pain / Temperature The sensory receptors / fibres associated with each sensory modality are: o Proprioception  Muscle Spindles (also known as Neuromuscular Spindles) – these are locat ...
REVIEW
REVIEW

... extrinsic factors such as GnRH from neighboring neurons.37 It is very likely that other neural inputs from central38 or peripheral sources (e.g. trigeminal ®bers) may also modulate the activity of these neurons (Fig. 3). We hypothesize that the neural activity of and GnRH synthesis by the nervus ter ...
Responses to irrational actions in action
Responses to irrational actions in action

... To make predictions for possible patterns of results, it is useful to consider the three previous studies of observation of irrational actions in more detail. Brass et al. (2007) showed participants movies where an actor used an unusual effector to achieve a goal, whilst rationality of the action wa ...
Theories of pain: from specificity to gate control
Theories of pain: from specificity to gate control

... aspect of the organization of the nervous system. Concurrently, in Germany, Johannes Müller published a Manual of Physiology, which echoed Charles Bonnet’s manual published one century earlier (Rey 1995). Müller’s manual, published in 1840, sought to summarize and synthesize findings in physiology. ...
Hippocampal mechanisms for the context-dependent retrieval of episodes 2005 Special issue
Hippocampal mechanisms for the context-dependent retrieval of episodes 2005 Special issue

... variable intervals and similarity of events in a familiar environment. Here, this process has been modeled based on the physiological properties of the hippocampal formation, including mechanisms for sustained activity in entorhinal cortex and theta rhythm oscillations in hippocampal subregions. The ...
Neurotransmitter Function
Neurotransmitter Function

... button, transmitter is released.  Ca++ (calcium) channels open in the membrane  Ca++ enters and fuses with the synaptic vesicles that are docked to the membrane  Vesicles then release neurotransmitter into the ...
Neural circuit rewiring: insights from DD synapse remodeling
Neural circuit rewiring: insights from DD synapse remodeling

... Nervous systems exhibit many forms of neuronal plasticity during growth, learning and memory consolidation, as well as in response to injury. Such plasticity can occur across entire nervous systems as with the case of insect metamorphosis, in individual classes of neurons, or even at the level of a ...
Nervous System I
Nervous System I

... A neuron may have many dendrites, but only one axon. In most neurons the axon arises from the cell body as a coneshaped thickening called the axon hillock. The cytoplasm of the axon includes many mitochondria, microtubules, and neurofibrils (ribosomes are found only in the cell body). The axon may g ...
marin_C02 - Napa Valley College
marin_C02 - Napa Valley College

... shared by all humans • Stem from Charles Darwin’s theory of evolution: • Organisms evolve based on need to adapt to the environment and survive to pass on genes ...
Principles of Extracellular Single
Principles of Extracellular Single

... doubt that larger neurons generate a more widely distributed potential field and are simply more likely to be encountered. For example, Towe and Harding,10 recording in cats, estimated that the largest 5% of pyramidal tract neurons accounted for ~50% of the sample encountered with an extracellular e ...
Dendritic RNA Transport: Dynamic Spatio-Temporal Control of Neuronal Gene Expression
Dendritic RNA Transport: Dynamic Spatio-Temporal Control of Neuronal Gene Expression

... (see Table 1), most likely because many of these proteins may play an essential role in early development and therefore knockout animals may not be viable. However, a viable knockout mouse has been generated for CPEB1, and neurons from these mutant mice have shown reduced dendritic localization of a ...
Anatomofunctional organization of the ventral primary motor and
Anatomofunctional organization of the ventral primary motor and

... 50 ms; single pulse width, 0.2 ms; and pulse frequency, 330 Hz. The current intensity ranged from 3 to 40 lA and was controlled on an oscilloscope by measuring the voltage drop across a 10 KX resistor in series with the stimulating electrode. In each penetration, ICMS was performed at every 500 lm o ...
Ullman, 2004 - Brain and Language Lab
Ullman, 2004 - Brain and Language Lab

... evolution, development, and neural computation. This follows from the fact that most other domains have benefited from the development of animal models which allow for invasive and highly informative techniques that are not permissible to perform on humans. A reasonable research program would thus b ...
segregation of stimulus phase and intensity coding in the cochlear
segregation of stimulus phase and intensity coding in the cochlear

... increasing frequency. We have observed this phenomenon both with spike detectors which measure the time of occurrence of the action potential peak and the time at which a fixed voltage level is crossed. Tests with artificial spikes and mathematical simulations show that peak time detection is much l ...
The role of metabotropic glutamate receptors in Alzheimer`s disease
The role of metabotropic glutamate receptors in Alzheimer`s disease

... system and also participate in plastic changes in the efficacy of synaptic transmission underlying memory and learning, and the formation of neural networks during development (Mayer and Westbrook 1987, Monaghan et al. 1989). However, rather ironically, glutamate can also be excitotoxic to neurons i ...
Chapter 2 An Integrative Approach to Psychopathology
Chapter 2 An Integrative Approach to Psychopathology

... Psychopathology  The Field of Neuroscience  The role of the nervous system in disease and behavior  Branches of the Human Nervous System  The central nervous system (CNS)  Brain and spinal cord  The peripheral nervous system (PNS)  Somatic and autonomic branches ...
Zwicker Tone Illusion and Noise Reduction in the Auditory System
Zwicker Tone Illusion and Noise Reduction in the Auditory System

... the other hand, provides a solution. As shown in Fig. 2(f), during sound presentation noise-detection neurons react against the noise, except where they are inhibited by the pure tone. In the tone’s tonotopic neighborhood hole burning arises because the pure tone excites featuredetector neurons, whi ...
Sensory Regeneration in Arthropods: Implications of Homoeosis
Sensory Regeneration in Arthropods: Implications of Homoeosis

... New synapses must have been formed. ontogeny. The crucial event is in the pasThen, superimposing the conceptual sage of the first regenerating neurons framework of the fixed, parsimonious ner- through the post-embryonic landscape. vous system, tightly wired for fixed action Once connection is achiev ...
- AVMA Journals Online
- AVMA Journals Online

... and projects to the ipsilateral nucleus olivaris.6 The RN also seems to be reciprocally connected with the LVN, providing the basis for coordinated activity of both structures during the development of vestibulospinal and rubrospinal motor events.7,8 Also, connectivity between the divisions of the R ...
Confidence-Related Decision Making
Confidence-Related Decision Making

... decision. Noise resulting from the random spiking times of individual neurons makes the decision making probabilistic. We also show that a second attractor network can make decisions based on the confidence in the first decision. This system is supported by and accounts for neuronal responses record ...
Bayesian Spiking Neurons II: Learning
Bayesian Spiking Neurons II: Learning

... In the companion letter in this issue (“Bayesian Spiking Neurons I: Inference”), we showed that the dynamics of spiking neurons can be interpreted as a form of Bayesian integration, accumulating evidence over time about events in the external world or the body. We proceed to develop a theory of Baye ...
PREFERENTIAL POTENTIATION OF WEAKER INPUTS TO PRIMARY
PREFERENTIAL POTENTIATION OF WEAKER INPUTS TO PRIMARY

... PTx - pertussis toxin treatment TBS - theta burst stimulation V1 - primary visual cortex ...
- Wiley Online Library
- Wiley Online Library

... article even suggesting that it may be neuroinflammatory events during early fetal development which result in this shared pathogenesis (Meyer et al., 2011). The most well-known characteristic of autism in humans is behavioral alterations including sensory and motor deficits, elevated anxiety and im ...
Distinct Functions of 3 and V Integrin Receptors
Distinct Functions of 3 and V Integrin Receptors

... in these assays caused neurons not only to stop their migration on radial glial strands but also to attach to each other rather than to their radial glial guides (Figures 5G and 5H). No such switch from gliophilic to neurophilic adhesive preference was noticed under control conditions. Taken togethe ...
T2 - Center for Neural Basis of Cognition
T2 - Center for Neural Basis of Cognition

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Metastability in the brain

In the field of computational neuroscience, the theory of metastability refers to the human brain’s ability to integrate several functional parts and to produce neural oscillations in a cooperative and coordinated manner, providing the basis for conscious activity.Metastability, a state in which signals (such as oscillatory waves) fall outside their natural equilibrium state but persist for an extended period of time, is a principle that describes the brain’s ability to make sense out of seemingly random environmental cues. In the past 25 years, interest in metastability and the underlying framework of nonlinear dynamics has been fueled by advancements in the methods by which computers model brain activity.
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