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- Theta_rhythm abstract "The theta rhythm is an oscillatory pattern in electroencephalography(EEG) signals recorded either from inside the brain or from electrodes glued to the scalp. Two types of theta rhythm have been described. The "hippocampal theta rhythm" is a strong oscillation that can be observed in the hippocampus and other brain structures in numerous species of mammals including rodents, rabbits, dogs, cats, bats, and marsupials. "Cortical theta rhythms" are low-frequency components of scalp EEG, usually recorded from humans. Theta rhythms can be quantified using Quantitative electroencephalography (qEEG) using freely available toolboxes, such as, EEGLAB or the Neurophysiological Biomarker Toolbox (NBT).In rats, the most frequently studied species, theta rhythmicity is easily observed in the hippocampus, but can also be detected in numerous other cortical and subcortical brain structures. Hippocampal theta, with a frequency range of 6–10 Hz, appears when a rat is engaged in active motor behavior such as walking or exploratory sniffing, and also during REM sleep. Theta waves with a lower frequency range, usually around 6–7 Hz, are sometimes observed when a rat is motionless but alert. When a rat is eating, grooming, or sleeping, the hippocampal EEG usually shows a non-rhythmic pattern known as Large irregular activity or LIA. The hippocampal theta rhythm depends critically on projections from the medial septal area, which in turn receives input from the hypothalamus and several brainstem areas. Hippocampal theta rhythms in other species differ in some respects from those in rats. In cats and rabbits, the frequency range is lower (around 4–6 Hz), and theta is less strongly associated with movement than in rats. In bats, theta appears in short bursts associated with echolocation. In humans and other primates, hippocampal theta is difficult to observe at all.The function of the hippocampal theta rhythm is not clearly understood. Green and Arduini, in the first major study of this phenomenon, noted that hippocampal theta usually occurs together with desynchronized EEG in the neocortex, and proposed that it is related to arousal. Vanderwolf and his colleagues, noting the strong relationship between theta and motor behavior, have argued that it is related to sensorimotor processing. Another school, led by John O'Keefe, have suggested that theta is part of the mechanism animals use to keep track of their location within the environment. The most popular theories, however, link the theta rhythm to mechanisms of learning and memory (Hasselmo, 2005).Cortical theta rhythms observed in human scalp EEG are a different phenomenon, with no clear relationship to the hippocampus. In human EEG studies, the term theta refers to frequency components in the 4–7 Hz range, regardless of their source. Cortical theta is observed frequently in young children. In older children and adults, it tends to appear during meditative, drowsy, or sleeping states, but not during the deepest stages of sleep. Several types of brain pathology can give rise to abnormally strong or persistent cortical theta waves.".
- Theta_rhythm thumbnail Eeg_theta.svg?width=300.
- Theta_rhythm wikiPageExternalLink 889.
- Theta_rhythm wikiPageExternalLink 11725.
- Theta_rhythm wikiPageExternalLink 10897.
- Theta_rhythm wikiPageExternalLink theta.html.
- Theta_rhythm wikiPageID "3071594".
- Theta_rhythm wikiPageLength "28435".
- Theta_rhythm wikiPageOutDegree "48".
- Theta_rhythm wikiPageRevisionID "680826209".
- Theta_rhythm wikiPageWikiLink Action_potential.
- Theta_rhythm wikiPageWikiLink Alpha_wave.
- Theta_rhythm wikiPageWikiLink Atropine.
- Theta_rhythm wikiPageWikiLink Beta_wave.
- Theta_rhythm wikiPageWikiLink Category:Electroencephalography.
- Theta_rhythm wikiPageWikiLink Category:Electrophysiology.
- Theta_rhythm wikiPageWikiLink Category:Neurophysiology.
- Theta_rhythm wikiPageWikiLink Category:Waves.
- Theta_rhythm wikiPageWikiLink Cerebral_cortex.
- Theta_rhythm wikiPageWikiLink Delta_wave.
- Theta_rhythm wikiPageWikiLink Dendrite.
- Theta_rhythm wikiPageWikiLink Dentate_gyrus.
- Theta_rhythm wikiPageWikiLink Diagonal_band_of_Broca.
- Theta_rhythm wikiPageWikiLink EEG.
- Theta_rhythm wikiPageWikiLink EEGLAB.
- Theta_rhythm wikiPageWikiLink Electroencephalography.
- Theta_rhythm wikiPageWikiLink Entorhinal.
- Theta_rhythm wikiPageWikiLink Entorhinal_cortex.
- Theta_rhythm wikiPageWikiLink Epilepsy.
- Theta_rhythm wikiPageWikiLink Ethyl_carbamate.
- Theta_rhythm wikiPageWikiLink Gamma_wave.
- Theta_rhythm wikiPageWikiLink Goose_bumps.
- Theta_rhythm wikiPageWikiLink Hippocampi.
- Theta_rhythm wikiPageWikiLink Hippocampus.
- Theta_rhythm wikiPageWikiLink Hypothalamus.
- Theta_rhythm wikiPageWikiLink Large_irregular_activity.
- Theta_rhythm wikiPageWikiLink Long-term_potentiation.
- Theta_rhythm wikiPageWikiLink Mammal.
- Theta_rhythm wikiPageWikiLink Medial_septal_nucleus.
- Theta_rhythm wikiPageWikiLink Membrane_potential.
- Theta_rhythm wikiPageWikiLink Mu_wave.
- Theta_rhythm wikiPageWikiLink Neocortex.
- Theta_rhythm wikiPageWikiLink Neural_oscillation.
- Theta_rhythm wikiPageWikiLink Neuron.
- Theta_rhythm wikiPageWikiLink Piloerection.
- Theta_rhythm wikiPageWikiLink Quantitative_electroencephalography.
- Theta_rhythm wikiPageWikiLink Rapid_eye_movement_sleep.
- Theta_rhythm wikiPageWikiLink Rodent.
- Theta_rhythm wikiPageWikiLink Sensorimotor_rhythm.
- Theta_rhythm wikiPageWikiLink Septal_nuclei.
- Theta_rhythm wikiPageWikiLink Sleep.
- Theta_rhythm wikiPageWikiLink Steal_This_Album!.
- Theta_rhythm wikiPageWikiLink Theta_rhythm.
- Theta_rhythm wikiPageWikiLink Theta_wave.
- Theta_rhythm wikiPageWikiLink Volt.
- Theta_rhythm wikiPageWikiLink File:Eeg_theta.svg.
- Theta_rhythm wikiPageWikiLinkText "Theta rhythm".
- Theta_rhythm wikiPageWikiLinkText "Theta wave".
- Theta_rhythm wikiPageWikiLinkText "Theta waves".
- Theta_rhythm wikiPageWikiLinkText "theta activity".
- Theta_rhythm wikiPageWikiLinkText "theta band".
- Theta_rhythm wikiPageWikiLinkText "theta brainwaves".
- Theta_rhythm wikiPageWikiLinkText "theta phase precession".
- Theta_rhythm wikiPageWikiLinkText "theta rhythm".
- Theta_rhythm wikiPageWikiLinkText "theta waves".
- Theta_rhythm wikiPageWikiLinkText "theta".
- Theta_rhythm wikiPageWikiLinkText "θ".
- Theta_rhythm hasPhotoCollection Theta_rhythm.
- Theta_rhythm wikiPageUsesTemplate Template:Citation_needed.
- Theta_rhythm wikiPageUsesTemplate Template:Cite_journal.
- Theta_rhythm wikiPageUsesTemplate Template:EEG.
- Theta_rhythm wikiPageUsesTemplate Template:Redirect3.
- Theta_rhythm wikiPageUsesTemplate Template:Refbegin.
- Theta_rhythm wikiPageUsesTemplate Template:Refend.
- Theta_rhythm wikiPageUsesTemplate Template:SleepSeries2.
- Theta_rhythm subject Category:Electroencephalography.
- Theta_rhythm subject Category:Electrophysiology.
- Theta_rhythm subject Category:Neurophysiology.
- Theta_rhythm subject Category:Waves.
- Theta_rhythm hypernym Pattern.
- Theta_rhythm type Article.
- Theta_rhythm type Disease.
- Theta_rhythm type Article.
- Theta_rhythm comment "The theta rhythm is an oscillatory pattern in electroencephalography(EEG) signals recorded either from inside the brain or from electrodes glued to the scalp. Two types of theta rhythm have been described. The "hippocampal theta rhythm" is a strong oscillation that can be observed in the hippocampus and other brain structures in numerous species of mammals including rodents, rabbits, dogs, cats, bats, and marsupials.".
- Theta_rhythm label "Theta rhythm".
- Theta_rhythm sameAs Onda_theta.
- Theta_rhythm sameAs Rythme_thêta.
- Theta_rhythm sameAs Թետա-ռիթմ.
- Theta_rhythm sameAs m.08ph4y.
- Theta_rhythm sameAs Тета-ритм.
- Theta_rhythm sameAs Thetavågor.
- Theta_rhythm sameAs Тета-ритм.
- Theta_rhythm sameAs Q2370623.
- Theta_rhythm sameAs Q2370623.
- Theta_rhythm wasDerivedFrom Theta_rhythm?oldid=680826209.
- Theta_rhythm depiction Eeg_theta.svg.
- Theta_rhythm isPrimaryTopicOf Theta_rhythm.