Depth-Electroencephalograms of Chickens in Wakefulness and Sleep

Sugihara, Kunio; Gotoh, Jiro

doi:10.2170/jjphysiol.23.371

Cited by 22 publications

(9 citation statements)

References 6 publications

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“…5; Buzsáki, 1986, 1989; Sirota & Buzsáki, 2005; Ulanovsky & Moss, 2007). In contrast to mammals, such hippocampal sharp‐wave/ripples (SWRs) have not been reported in birds during SWS (Ookawa & Gotoh, 1965; Van Twyver & Allison, 1972; Sugihara & Gotoh, 1973; Szymczak, 1987; Fuchs et al , 2006; Martinez‐Gonzalez et al , 2008, Dos Santos et al , 2009). Instead, the avian hippocampus tends to show only slow‐waves similar to those observed in other pallial regions, albeit with a lower amplitude during SWS (Sugihara & Gotoh, 1973).…”

Section: Avian and Mammalian Sleepmentioning

confidence: 99%

“…In contrast to mammals, such hippocampal sharp‐wave/ripples (SWRs) have not been reported in birds during SWS (Ookawa & Gotoh, 1965; Van Twyver & Allison, 1972; Sugihara & Gotoh, 1973; Szymczak, 1987; Fuchs et al , 2006; Martinez‐Gonzalez et al , 2008, Dos Santos et al , 2009). Instead, the avian hippocampus tends to show only slow‐waves similar to those observed in other pallial regions, albeit with a lower amplitude during SWS (Sugihara & Gotoh, 1973). In addition, SWRs were not reported in local field potential recordings from multiple hippocampal regions in pigeons during quiet wakefulness (Siegel, Nitz & Bingman, 2000).…”

Section: Avian and Mammalian Sleepmentioning

confidence: 99%

“…Although birds exhibit EEG activation and other features characteristic of mammalian REM sleep (e.g. rapid eye movements, twitching, reduced muscle tone, and reduced thermoregulation), a hippocampal theta rhythm has not been observed during avian REM sleep (Berger & Walker, 1972; Van Twyver & Allison, 1972; Sugihara & Gotoh, 1973; Šušić & Kovačević, 1973; Szymczak, 1987; Ookawa, 2004; Fuchs et al , 2006; Martinez‐Gonzalez et al , 2008; Dos Santos et al , 2009). In addition, most studies did not find a hippocampal theta rhythm during wakefulness in birds (Van Twyver & Allison, 1972; Sugihara & Gotoh, 1973; Dos Santos et al , 2009), apparently including flying pigeons navigating home (supplemental material in Vyssotski et al , 2009).…”

Section: Avian and Mammalian Sleepmentioning

confidence: 99%

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Hippocampal memory consolidation during sleep: a comparison of mammals and birds

et al. 2010

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The transition from wakefulness to sleep is marked by pronounced changes in brain activity. The brain rhythms that characterize the two main types of mammalian sleep, slow-wave sleep (SWS) and rapid eye movement (REM) sleep, are thought to be involved in the functions of sleep. In particular, recent theories suggest that the synchronous slow-oscillation of neocortical neuronal membrane potentials, the defining feature of SWS, is involved in processing information acquired during wakefulness. According to the Standard Model of memory consolidation, during wakefulness the hippocampus receives input from neocortical regions involved in the initial encoding of an experience and binds this information into a coherent memory trace that is then transferred to the neocortex during SWS where it is stored and integrated within preexisting memory traces. Evidence suggests that this process selectively involves direct connections from the hippocampus to the prefrontal cortex (PFC), a multimodal, high-order association region implicated in coordinating the storage and recall of remote memories in the neocortex. The slowoscillation is thought to orchestrate the transfer of information from the hippocampus by temporally coupling hippocampal sharp-wave/ripples (SWRs) and thalamocortical spindles. SWRs are synchronous bursts of hippocampal activity, during which waking neuronal firing patterns are reactivated in the hippocampus and neocortex in a coordinated manner. Thalamocortical spindles are brief 7-14 Hz oscillations that may facilitate the encoding of information reactivated during SWRs. By temporally coupling the readout of information from the hippocampus with conditions conducive to encoding in the neocortex, the slow-oscillation is thought to mediate the transfer of information from the hippocampus to the neocortex. Although several lines of evidence are consistent with this function for mammalian SWS, it is unclear whether SWS serves a similar function in birds, the only taxonomic group other than mammals to exhibit SWS and REM sleep. Based on our review of research on avian sleep, neuroanatomy, and memory, although involved in some forms of memory consolidation, avian sleep does not appear to be involved in transferring hippocampal memories to other brain regions. Despite exhibiting the slow-oscillation, SWRs and spindles have not been found in birds. Moreover, although birds independently evolved a brain region -the caudolateral nidopallium (NCL) -involved in performing high-order cognitive functions similar to those performed by the PFC, direct connections between the NCL and hippocampus have not been found in birds, and evidence for the transfer of information from the hippocampus to the NCL or other extra-hippocampal regions is lacking. Although based on the absence of evidence for various traits, collectively, these findings suggest that unlike mammalian SWS, avian SWS may not be involved in transferring memories from the hippocampus. Furthermore, it suggests that the slow-oscillation, the defining featur...

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Section: Avian and Mammalian Sleepmentioning

confidence: 99%

Section: Avian and Mammalian Sleepmentioning

confidence: 99%

Section: Avian and Mammalian Sleepmentioning

confidence: 99%

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Hippocampal memory consolidation during sleep: a comparison of mammals and birds

et al. 2010

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“…PS is present in all sleeping birds and mammals so far studied, except possibly monotremes (see review article by Meddis, 1975), though the question of whether PS is present in reptiles has been widely discussed in the literature (Snyder, 1969(Snyder, , 1972Karmanova et al, 1972). In mammals theta-like waves are observed in the hippocampus during arousal and paradoxical sleep states (Allison and Twyver, 1970) while in chickens these waves are not recorded in the hippocampal or parahippocampal area phylogenetically corresponding to the archicortex of mammals (Peters et al, 1968b;Van Twyver and Allison, 1972;Sugihara and Gotoh, 1973). In general, the awake state was characterized in the surface EEG of birds by the arousal EEG pattern of low voltage, high frequency similar to that found in mammals.…”

Section: Sd Induced By Intravenous Metrazol Was Previously Demonstratmentioning

confidence: 92%

Behavioral and Electroencephalographic Manifestations of Avian Epilepsy: A Review of the Literature

Ookawa

1977

Poultry Science

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Recently, electrophysiological studies on sleep and wakefulness in birds have yielded useful results. Furthermore, recent evidence obtained in behavioral and electroencephalographical investigations of epileptic birds, induced neuropharmacologically or genetically, have led to recognition of the fact that epileptic seizures are present in aves, and that these seizures reveal many similarities between mammalian and avian epilepsy. While the investigation of birds is of obvrious value for demonstrating the neuropharmacological interrelationship with the brain, comparison of the correlation between abnormal behavior and the electroencephalogram in birds and higher vertebrates requires further research. In the present paper, normal and abnormal electroencephalographic activity associated with behavior of birds is reviewed. It was concluded that birds provide a useful preparation for studying experimental epilepsy.

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“…A small amount of marginal bleeding usually stopped spontaneously or after the application of hydrogen peroxide (3%). Small holes were made bilaterally in the skull with a fine dental burr (on a variable speed handpiece) between the vein running parallel with the orbital rim and the eye and in relatively the Same position as described for the hyperstriatum in chickens (Sugihara & Gotoh, 1973). The electrodes were inserted into the brain superficially, the surrounding skull dried, and the electrodes cemented securely in place.…”

Section: Injectionmentioning

confidence: 99%

A longitudinal study of bioelectric activity in the pre‐ and post‐hatch chick

Speciale¹,

Nowaczyk²,

Jouvet³

1976

Developmental Psychobiology

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A technique for embryonic implantation and the subsequent recording of electrocortical, neck muscle, and ocular activity continously from the 20th day of incubation through hatching and the first few days thereafter is demonstrated. The embryonic maturation of the EEG, with a characteristic muscle burst pattern heralding hatching was found, supporting previous reports obtained with acute preparations. The technique for injection into the chorioallantoic membrane (CAM) vessels or direct deposition onto the CAM is also described. The usefulness of the embryonic neurophysiological implantation coupled with the injection at specific stages of development is discusses as an approach to the understanding of the parameters of the maturation of the sleep-wakefulness cycle, neurochemistry, and behavior.

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Depth-Electroencephalograms of Chickens in Wakefulness and Sleep

Cited by 22 publications

References 6 publications

Hippocampal memory consolidation during sleep: a comparison of mammals and birds

Hippocampal memory consolidation during sleep: a comparison of mammals and birds

Behavioral and Electroencephalographic Manifestations of Avian Epilepsy: A Review of the Literature

A longitudinal study of bioelectric activity in the pre‐ and post‐hatch chick

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