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D015225. Magnetoencephalography (MEG) is a functional neuroimaging technique for mapping brain activity by recording magnetic fields produced by electrical currents occurring naturally in the brain, using very sensitive magnetometers. Arrays of SQUIDs (superconducting quantum interference devices) are currently the most common magnetometer ...
Electroencephalography. Epileptic spike and wave discharges monitored EEG. [ edit on Wikidata] Electroencephalography (EEG) [ 1 ] is a method to record an electrogram of the spontaneous electrical activity of the brain. The biosignals detected by EEG have been shown to represent the postsynaptic potentials of pyramidal neurons in the neocortex ...
The experimenter (E) orders the teacher (T), the subject of the experiment, to give what the teacher (T) believes are painful electric shocks to a learner (L), who is actually an actor and confederate. The subject is led to believe that for each wrong answer, the learner was receiving actual electric shocks, though in reality there were no such ...
For projections from one region of the nervous system to another, see neural pathway. A neural circuit is a population of neurons interconnected by synapses to carry out a specific function when activated. [ 1 ] Multiple neural circuits interconnect with one another to form large scale brain networks. [ 2 ]
An event-related potential (ERP) is the measured brain response that is the direct result of a specific sensory, cognitive, or motor event. [ 1 ] More formally, it is any stereotyped electrophysiological response to a stimulus. The study of the brain in this way provides a noninvasive means of evaluating brain functioning.
Theorists differ in how they relate consciousness to electromagnetism. Electromagnetic field theories (or "EM field theories") of consciousness propose that consciousness results when a brain produces an electromagnetic field with specific characteristics. Susan Pockett [ 1 ][ 2 ] and Johnjoe McFadden [ 3 ] have proposed EM field theories ...
Psychophysiology (from Greek ψῡχή, psȳkhē, "breath, life, soul"; φύσις, physis, "nature, origin"; and -λογία, -logia) is the branch of psychology that is concerned with the physiological bases of psychological processes. [ 1 ] While psychophysiology was a general broad field of research in the 1960s and 1970s, it has now become ...
Neural responses are noisy and unreliable. This type of code is used to encode continuous variables such as joint position, eye position, color, or sound frequency. Any individual neuron is too noisy to faithfully encode the variable using rate coding, but an entire population ensures greater fidelity and precision.