Neurophysiological Indicators
Neurophysiological Indicators - Related Videos
09:16
An Introduction to Neurophysiology
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2023
Neurophysiology is broadly defined as the study of nervous system function. In this field, scientists investigate the central and peripheral nervous systems at the level of whole organs, cellular networks, single cells, or even subcellular compartments. A unifying feature of this wide-ranging discipline is an interest in the mechanisms that lead to the generation and propagation of electrical impulses within and between neurons. This subject is important not only for our understanding of the...
02:39
Indicators
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2020
Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are called...
09:37
Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
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Cited by 5 •
2015
Attention control comprises enhancement of target signals and attenuation of distractor signals. We describe an approach to measure separately but concurrently, the neurophysiology of attending and ignoring in sustained intermodal attention, utilizing a passive control condition during which neither process is continuously engaged.
19:32
Preterm EEG: A Multimodal Neurophysiological Protocol
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Cited by 39 •
2012
This video explains the background theory of the neonatal EEG activity and the sensory responses, followed by a live demonstration of their recording in neonatal intensive care unit.
08:17
Water Quality Analysis via Indicator Organisms
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2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba -The University of Arizona Demonstrating Author: Luisa Ikner Water quality analysis monitors anthropogenic influences such as pollutants, nutrients, pathogens, and any other constituent that can impact the water’s integrity as a resource. Fecal contamination contributes microbial pathogens that threaten plant, animal, and human health with disease or illness. Increasing water demands and strict quality standards require that water...
FAQs
These indicators can reflect neuronal electrical activity, synaptic communication, or signal transmission along nerves. Because each process occurs at a different functional level, the resulting measurements can provide complementary information about brain and peripheral nerve performance. Considering these levels together helps clinicians and researchers relate recorded signals to nervous-system function, behavior, injury, or disease mechanisms.
The methods differ in the type of nervous-system activity they record. Electroencephalography records brain-related electrical activity, while evoked potentials capture responses associated with stimulation or a defined event. Electromyography assesses electrical activity in muscle, and nerve-conduction studies examine signal transmission along nerves. This distinction allows investigators to select measurements suited to central or peripheral function.
Objective neurophysiological measurements provide observable signals and responses that complement clinical assessment. They can help evaluate nervous-system function without relying only on reported symptoms or behavioral observation. In medicine, this information supports diagnosis, disease-progress monitoring, and treatment assessment. In research, it helps connect nervous-system activity with injury, behavior, disease mechanisms, and intervention outcomes.
Selection depends on the part and function of the nervous system being investigated. Brain-focused questions may call for electroencephalography or evoked potentials, whereas muscle or peripheral-nerve questions may be addressed with electromyography or nerve-conduction studies. Matching the recording method to the clinical question helps produce information that is relevant to assessment and interpretation.
A typical approach begins by identifying the nervous-system function of interest, choosing a suitable recording method, and collecting the relevant signal or response. The resulting measurement is then interpreted to evaluate function, support diagnosis, monitor change, or assess treatment effects. The same general workflow can also link nervous-system activity with behavior, injury, or disease mechanisms.
They are useful when researchers need measurable evidence of nervous-system activity or functional change during the development and evaluation of rehabilitative interventions. These indicators can help relate an intervention to brain, nerve, or muscle function and can support assessment of treatment effects. Their use strengthens comparisons between nervous-system measurements, behavioral findings, injury, and disease-related mechanisms.