The effects of early post-hatching changes of imprinting object on the pattern of monocular/unihemispheric sleep of domestic chicks

Bobbo, Daniela; Vallortígara, Giorgio; Mascetti, Gian Gastone

doi:10.1016/j.bbr.2006.01.020

Cited by 12 publications

(7 citation statements)

References 29 publications

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“…In a different study, changing the imprinting object from one day to the other produced a bias towards increased left hemispheric sleep, possibly related to increased consolidation processes in the left hemisphere (102). Unilateral sleep typically covers ϳ1-2% of sleep time in chicks.…”

Section: Filial Imprintingmentioning

confidence: 98%

About Sleep's Role in Memory

Rasch

Born

2013

Physiological Reviews

2,238

2,026

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Over more than a century of research has established the fact that sleep benefits the retention of memory. In this review we aim to comprehensively cover the field of "sleep and memory" research by providing a historical perspective on concepts and a discussion of more recent key findings. Whereas initial theories posed a passive role for sleep enhancing memories by protecting them from interfering stimuli, current theories highlight an active role for sleep in which memories undergo a process of system consolidation during sleep. Whereas older research concentrated on the role of rapid-eye-movement (REM) sleep, recent work has revealed the importance of slow-wave sleep (SWS) for memory consolidation and also enlightened some of the underlying electrophysiological, neurochemical, and genetic mechanisms, as well as developmental aspects in these processes. Specifically, newer findings characterize sleep as a brain state optimizing memory consolidation, in opposition to the waking brain being optimized for encoding of memories. Consolidation originates from reactivation of recently encoded neuronal memory representations, which occur during SWS and transform respective representations for integration into long-term memory. Ensuing REM sleep may stabilize transformed memories. While elaborated with respect to hippocampus-dependent memories, the concept of an active redistribution of memory representations from networks serving as temporary store into long-term stores might hold also for non-hippocampus-dependent memory, and even for nonneuronal, i.e., immunological memories, giving rise to the idea that the offline consolidation of memory during sleep represents a principle of long-term memory formation established in quite different physiological systems.

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Section: Filial Imprintingmentioning

confidence: 98%

About Sleep's Role in Memory

Rasch

Born

2013

Physiological Reviews

2,238

2,026

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“…Subsequent research demonstrated that, if the first imprinting object is removed and substituted with a new one, imprinting can be directed toward this second object (even though memory for the first object may not disappear) (Kent, 1987;Bolhuis and Trooster, 1988;Cherfas and Scott, 1981). Why should the left hemisphere be particularly involved in the initial encoding of the features of a secondary imprinting object (as hypothesised in the study of Bobbo et al, 2006b)? Lesion and electrophysiological studies demonstrated that an associative forebrain structure, known as IMM (Intermediate Medial Mesopallium), is part of a memory system that encodes a representation of the imprinting object (Horn, 1990;.…”

Section: Monocular-unihemispheric Sleepmentioning

confidence: 99%

“…During the first week of exposure to an imprinting object (a cagemate), female chicks present a bias toward right-hemisphere monocular sleep, probably as a consequence of intense social-interaction and encoding of the distinctive features of their cagemate (Bobbo, Vallortigara and Mascetti, 2006a). Interestingly, experiencing changes in the appearance of the imprinting object caused a bias for left hemisphere monocular unilateral sleep (Bobbo, Vallortigara and Mascetti, 2006b). The interpretation of this last result is less clear, since it could be explained as either a tendency to open the left eye in order to monitor the novel stimulus with the right hemisphere, or as an activation of the left hemisphere for initial encoding of the features of a secondary imprinting object (the modified stimulus), with consequent left-hemispheric sleep in order to achieve memory consolidation.…”

Section: Monocular-unihemispheric Sleepmentioning

confidence: 99%

“…This view fits well with the monkey data; being raised in the laboratory it is conceivable that they received a large amount of exposure to human faces, which could have determined a LGB for human faces. brain activation (c-fos and zif/268 mRNA expression) during exposure to conspecific faces single-cell recording during exposure to face stimuli Vallortigara and Andrew, 1991;Rogers, 2002b McKenzie et al, 1998;Vallortigara, 1992a;Vallortigara et al, 2001Bisazza et al, 1997a1997b;1998;Brown et al, 2007Bobbo et al, 2006a2006b domestic chick (Gallus gallus) Santi, 2003Deckel, 1995Hews and Worthington, 2001;Hews et al, 2004Robins et al, 1998Vallortigara et al, 1998 Casper andDunbard, 1996;Drews, 1996Rogers et al, 1985Ventolini et An hypothesis about the role of experience in this kind of phenomena is that a form of perceptual tuning in favour of the type of face more often experienced during development could be at the basis of many well known effects that are considered hallmarks of specialized face processing (e.g., the face inversion effect, Diamond and Carey, 1986; the other species effect, Pascalis, de Haan and Nelson, 2002; see also Nelson, 2001). In line with that is the fact that 6-month-old babies displayed a much less selective LGB, which extended to non-face objects (Guo et al, 2009).…”

Section: Face Perceptionmentioning

confidence: 99%

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Cerebral and Behavioural Asymmetries in Animal Social Recognition

Rosa‐Salva¹,

Regolin²,

Mascalzoni³

et al. 2012

CCBR

110

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Evidence is here summarized that animal species belonging to distant taxa show forms of social recognition, a sophisticated cognitive ability adaptive in most social interactions. The paper then proceeds to review evidence of functional lateralization for this cognitive ability. The main focus of this review is evidence obtained in domestic chickens, the animal model employed in the authors' laboratories, but we also discuss comparisons with data from species ranging from fishes, amphibians and reptiles, to other birds and mammals. A consistent pattern emerges, pointing toward a right hemisphere dominance, in particular for discrimination of social companions and individual (or familiarity-based) recognition, whereas the left hemisphere could be specialized for "category-based" distinctions (e.g., conspecifics versus heterospecifics). This pattern of results is discussed in relation to a more general specialization and processing styles of the two sides of the brain, with the right hemisphere predisposed for developing a detailed, global and contextual representation of objects, and the left hemisphere predisposed for rapid assignment of a stimulus to a category, for processing releaser stimuli and for control of responses.

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“…The apparatus used for chick rearing and sleep recording has been described elsewhere (Bobbo et al 2002(Bobbo et al , 2006Mascetti et al 1999Mascetti et al , 2004aNelini et al 2010). BrieXy, it consisted of two glass home-cages (30 £ 40 £ 40 cm) with semi-transparent cloths along the wall serving as one-way screen (Fig.…”

Section: Apparatusmentioning

confidence: 99%

Monocular learning of a spatial task enhances sleep in the right hemisphere of domestic chicks (Gallus gallus)

2012

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Unihemispheric sleep is an aspect of cerebral lateralization of birds. During sleep, domestic chicks show brief periods during which one eye is open whilst the other remains shut. In this study, time spent in sleeping and in monocular-unihemispheric sleep (Mo-Un sleep) was investigated following the monocular learning of a spatial discrimination task. Two groups of experimental chicks from day 8 to day 11 post-hatching were trained in a spatial paradigm based on geometrical and topographical clues. One group performed the task with left eye open (LE-chicks), whilst another group performed the task with the right eye open (RE-chicks). LE-chick learned the task, whilst RE-chicks were unable to learn. Time spent in binocular sleep and right Mo-Un sleep (right eye closed and left hemisphere sleeping) was equal in both groups of chicks. Time spent in left Mo-Un sleep (left eye closed and right hemisphere sleeping) was significantly higher in LE-chicks than in RE-chicks. Laterality index reveals that LE-chicks had a significant bias towards more left Mo-Un sleep at any recording day, whilst RE-chicks showed a significant bias towards more right Mo-Un sleep at day 8 and 9 but not at days 10 and 11. RE-chick bias at days 8 and 9 could be attributed to a recovery process in left hemisphere connected to its activation/use effect during trials whilst recovery would be absent at days 10 and 11. LE-chicks bias would be associated with the formation of a spatial memory trace and with a recovery process in right hemisphere.

show abstract

The effects of early post-hatching changes of imprinting object on the pattern of monocular/unihemispheric sleep of domestic chicks

Cited by 12 publications

References 29 publications

About Sleep's Role in Memory

About Sleep's Role in Memory

Cerebral and Behavioural Asymmetries in Animal Social Recognition

Monocular learning of a spatial task enhances sleep in the right hemisphere of domestic chicks (Gallus gallus)

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