| Records |
| Author |
Ruggieri, V. |
| Title |
The running horse stops: the hypothetical role of the eyes in imagery of movement |
Type |
Journal Article |
| Year |
1999 |
Publication |
Perceptual and motor skills |
Abbreviated Journal |
Percept Mot Skills |
| Volume |
89 |
Issue |
3 Pt 2 |
Pages |
1088-1092 |
| Keywords |
Adult; Cerebral Cortex/physiology; Eye Movements/*physiology; Female; Functional Laterality/physiology; Head/physiology; Humans; *Imagination; Models, Neurological; *Motion Perception; Movement/physiology; *Ocular Physiology; *Optical Illusions; Posture/physiology |
| Abstract |
To examine the hypothetical role of the eyes in visual mental imagery of movement 72 undergraduate women students in psychology were asked to imagine a running horse and then to produce the same mental image without moving the eyes and the head. In 59% of the subjects interesting modifications of the imagined movement appeared: 37% observed an inhibition of the movement and 19% an evident slowing up of the moving figure. The interpretation of this result was made by hypothesizing that the eyes are concretely involved in visual imagery processes. |
| Address |
University of Rome La Sapienza |
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| Language |
English |
Summary Language |
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Edition |
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| ISSN |
0031-5125 |
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| Notes |
PMID:10710755 |
Approved |
no |
| Call Number |
refbase @ user @ |
Serial |
94 |
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| Author |
Sakai, M.; Hishii, T.; Takeda, S.; Kohshima, S. |
| Title |
Laterality of flipper rubbing behaviour in wild bottlenose dolphins (Tursiops aduncus): Caused by asymmetry of eye use? |
Type |
Journal Article |
| Year |
2006 |
Publication |
Behavioural Brain Research |
Abbreviated Journal |
Behav. Brain. Res. |
| Volume |
170 |
Issue |
2 |
Pages |
204-210 |
| Keywords |
Indo-Pacific bottlenose dolphin; Tursiops aduncus; Social behaviour; Contact behaviour; Flipper rubbing; Behavioural laterality; Eye use; Cerebral asymmetry |
| Abstract |
To determine whether wild Indo-Pacific bottlenose dolphins (Tursiops aduncus) at Mikura Island, Japan, show asymmetry of eye or flipper use during a social behaviour, we investigated the laterality of flipper-to-body (F-B) rubbing, in which one dolphin (“rubber”) rubs the body of another (“rubbee”) with its flipper. We analysed 382 episodes of video-recorded F-B rubbings performed by identified individuals (N = 111 rubbers). F-B rubbing was conducted significantly more frequently with the left flipper than with the right flipper. The duration of F-B rubbings was also significantly longer with the left flipper than with the right flipper. Of 20 dolphins, nine individuals showed significant left-side bias as the rubber in this behaviour, whereas no dolphins showed significant right-side bias. The results indicate a population-level left-side bias of the rubber in F-B rubbing. An analysis of the swimming configurations during this behaviour suggests that the asymmetry in F-B rubbing was caused not only by the laterality of the rubber, but by a preference for use of the left eye in both dolphins during this behaviour. Dolphins used the left eye significantly more frequently than the right eye during the inquisitive behaviour, while they showed no significant bias in flipper use during the object-carrying behaviour. These facts also suggest that the asymmetry of F-B rubbing is caused by the preference for using the left eye. Significant left-side bias was observed only in F-B rubbings initiated by the rubbee, in which the rubbee determined its position during this behaviour. This suggests that this behavioural asymmetry was enhanced by the rubbees choosing the left side of the rubber to ensure better and longer rubs. |
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Original Title |
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Series Title |
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Abbreviated Series Title |
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Series Issue |
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Edition |
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| ISSN |
0166-4328 |
ISBN |
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Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
5347 |
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| Author |
Sankey, C.; Henry, S.; Clouard, C.; Richard-Yris, M.-A.; Hausberger, M. |
| Title |
Asymmetry of behavioral responses to a human approach in young naive vs. trained horses |
Type |
Journal Article |
| Year |
2011 |
Publication |
Physiology & Behavior |
Abbreviated Journal |
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| Volume |
104 |
Issue |
3 |
Pages |
464-468 |
| Keywords |
Laterality; Emotionality; Human approach; Horse |
| Abstract |
The aim of this study was to investigate the impact of training experience on young horses (Equus caballus)’ lateralized responses to an approaching human. The results show that the one year old untrained horses display asymmetrical responses to an approaching human, with more negative reactions (escapes, threats) when approached from the left side, while approaches towards the right shoulder elicited more positive behaviors. On the contrary, two years old trained horses reacted equally positively to approaches and contact on both sides. Our findings support those of previous studies investigating a link between emotionality and laterality and confirm the role of the left hemisphere in the processing of novel or negative stimuli. Moreover, the data underline the impact work and training can have on this laterality in horses. |
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Edition |
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| ISSN |
0031-9384 |
ISBN |
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| Notes |
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Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
5688 |
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| Author |
Schultheiss, O.C.; Riebel, K.; Jones, N.M. |
| Title |
Activity inhibition: A predictor of lateralized brain function during stress? |
Type |
Journal Article |
| Year |
2009 |
Publication |
Neuropsychology |
Abbreviated Journal |
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| Volume |
23 |
Issue |
3 |
Pages |
392-404 |
| Keywords |
activity inhibition; laterality; stress; content analysis; self-regulation; mood states; affective stimuli; perceptual laterality; motor laterality |
| Abstract |
The authors tested the hypothesis that activity inhibition (AI), a measure of the frequency of the word “not” in written material, marks a propensity to engage functions of the right hemisphere (RH) and disengage functions of the left hemisphere (LH), particularly during stress. Study 1 and Study 2 showed that high AI predicts faster detection of stimuli presented to the RH, relative to the LH. Study 2 provided evidence that the AI-laterality effect is specific to perceptual, but not motor, laterality and that it is particularly strong in individuals with low mood, but absent in individuals in a positive mood state. Study 3 showed that negative affective stimuli prime the AI-laterality effect more strongly than positive affective stimuli. Findings from Study 4 suggest that situationally induced frustration (losing a contest), in conjunction with high AI, leads to increased attentional laterality. The present findings substantially bolster the construct validity of AI and contribute to a better understanding of earlier findings linking AI to physiological stress responses, immune system functioning, alcohol abuse, and nonverbal behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
| Address |
Schultheiss, Oliver C.: Institute of Psychology, Friedrich-Alexander University, Kochstrasse 4, Erlangen, Germany, 91054, oliver.schultheiss@psy.phil.uni-erlangen.de |
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| Publisher |
US: American Psychological Association |
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| ISSN |
1931-1559 (Electronic); 0894-4105 (Print) |
ISBN |
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| Notes |
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Approved |
no |
| Call Number |
Equine Behaviour @ team @ 2009-05986-011 |
Serial |
5382 |
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| Author |
Schwarz, S.; Marr, I.; Farmer, K.; Graf, K.; Stefanski, V.; Krueger, K. |
| Title |
Does Carrying a Rider Change Motor and Sensory Laterality in Horses? |
Type |
Journal Article |
| Year |
2022 |
Publication |
Animals |
Abbreviated Journal |
Animals |
| Volume |
12 |
Issue |
8 |
Pages |
992 |
| Keywords |
laterality; horse; rider; sensory laterality; motor laterality; novel object; side preference |
| Abstract |
Laterality in horses has been studied in recent decades. Although most horses are kept for riding purposes, there has been almost no research on how laterality may be affected by carrying a rider. In this study, 23 horses were tested for lateral preferences, both with and without a rider, in three different experiments. The rider gave minimal aids and rode on a long rein to allow the horse free choice. Firstly, motor laterality was assessed by observing forelimb preference when stepping over a pole. Secondly, sensory laterality was assessed by observing perceptual side preferences when the horse was confronted with (a) an unfamiliar person or (b) a novel object. After applying a generalised linear model, this preliminary study found that a rider increased the strength of motor laterality (p = 0.01) but did not affect sensory laterality (p = 0.8). This suggests that carrying a rider who is as passive as possible does not have an adverse effect on a horse�s stress levels and mental state. |
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| Notes |
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Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
6667 |
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| Author |
Siniscalchi, M.; Sasso, R.; Pepe, A.M.; Dimatteo, S.; Vallortigara, G.; Quaranta, A. |
| Title |
Sniffing with the right nostril: lateralization of response to odour stimuli by dogs |
Type |
Journal Article |
| Year |
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Publication |
Animal Behaviour |
Abbreviated Journal |
Anim. Behav. |
| Volume |
In Press, Corrected Proof |
Issue |
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Pages |
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| Keywords |
animal welfare; Canis familiaris; dog; emotion; laterality olfaction; physiology |
| Abstract |
Lateralization in dogs, Canis familiaris, has been reported for paw usage and response to visual and acoustic stimuli. Surprisingly, however, no investigation of possible lateralization for the most relevant sensory domain of dogs, namely olfaction, has been carried out. Here we investigated left and right nostril use in dogs freely sniffing different emotive stimuli in unrestrained conditions. When sniffing novel nonaversive stimuli (food, lemon, vaginal secretion and cotton swab odours), dogs showed initial preferential use of the right nostril and then a shift towards use of the left nostril with repeated stimulus presentation. When sniffing arousal stimuli such as adrenaline and veterinary sweat odorants, dogs showed a consistent right nostril bias all over the series of stimulus presentations. Results suggest initial involvement of the right hemisphere in processing of novel stimuli followed by the left hemisphere taking charge of control of routine behaviour. Sustained right nostril response to arousal stimuli appears to be consistent with the idea that the sympathetic hypothalamic-pituitary-adrenal axis is mainly under the control of the right hemisphere. The implications of these findings for animal welfare are discussed. |
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Series Issue |
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Edition |
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| ISSN |
0003-3472 |
ISBN |
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Expedition |
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Conference |
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| Notes |
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Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
5394 |
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| Author |
Siniscalchi, M.; Sasso, R.; Pepe, A.M.; Vallortigara, G.; Quaranta, A. |
| Title |
Dogs turn left to emotional stimuli |
Type |
Journal Article |
| Year |
2010 |
Publication |
Behavioural Brain Research |
Abbreviated Journal |
Behav. Brain. Res. |
| Volume |
208 |
Issue |
2 |
Pages |
516-521 |
| Keywords |
Dog; Laterality; Vision; Behaviour; Physiology; Cognition; Emotion; Animal welfare |
| Abstract |
During feeding behaviour, dogs were suddenly presented with 2D stimuli depicting the silhouette of a dog, a cat or a snake simultaneously into the left and right visual hemifields. A bias to turn the head towards the left rather than the right side was observed with the cat and snake stimulus but not with the dog stimulus. Latencies to react following stimulus presentation were lower for left than for right head turning, whereas times needed to resume feeding behaviour were higher after left rather than after right head turning. When stimuli were presented only to the left or right visual hemifields, dogs proved to be more responsive to left side presentation, irrespective of the type of stimulus. However, cat and snake stimuli produced shorter latencies to react and longer times to resume feeding following left rather than right monocular visual hemifield presentation. Results demonstrate striking lateralization in dogs, with the right side of the brain more responsive to threatening and alarming stimuli. Possible implications for animal welfare are discussed. |
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0166-4328 |
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Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
5080 |
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Stennett, C.R.; Strauss, R.E. |
| Title |
Behavioural lateralization in zebrafish and four related species of minnows (Osteichthyes: Cyprinidae) |
Type |
Journal Article |
| Year |
2010 |
Publication |
Animal Behaviour. |
Abbreviated Journal |
Anim. Behav. |
| Volume |
79 |
Issue |
6 |
Pages |
1339-1342 |
| Keywords |
binary data; Cyprinidae; Danio rerio; fish; laterality; monocular test; motor bias; score test; zebrafish |
| Abstract |
Behavioural lateralization has been observed in many species of fishes during stimulus-specific tasks. However, one area that has been overlooked is the study of naïve side bias in motor behaviour of fishes in the absence of direct visual stimulus. To this end, we examined naïve side biases in motor behaviour in five species of minnows (Osteichthyes: Cyprinidae). Fifteen individuals of each species were subjected to a T-shaped test arena, with 40 randomized replicates per individual. We took advantage of rheotaxis by running a slow current of water through each arm of the test apparatus. Of the 75 individuals tested, 55 showed a rightward turning preference. The overall right-biased behaviour observed in these fishes in the absence of systematic stimulus strongly suggests that a stimulus-free control condition be included in the experimental design whenever plausible for studies of laterality in fishes and presumably in other organisms. |
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0003-3472 |
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Approved |
no |
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Equine Behaviour @ team @ |
Serial |
5358 |
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| Author |
Stomp, M.; d'Ingeo, S.; Henry, S.; Cousillas, H.; Hausberger, M. |
| Title |
Brain activity reflects (chronic) welfare state: Evidence from individual electroencephalography profiles in an animal model |
Type |
Journal Article |
| Year |
2021 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
236 |
Issue |
|
Pages |
105271 |
| Keywords |
Laterality; Electroencephalography; Theta wave; Welfare; Horses |
| Abstract |
Assessing the animal welfare state is a challenge given the subjective individual cognitive and emotional processing involved. Electroencephalography (EEG) spectrum analysis has proved an ecologically valid recording situation to assess the link between brain processes and affective or cognitive states in humans: a higher slow wave/fast wave ratio has been associated with a positive internal state. In particular, a high production of theta power (3-8 Hz) has been related to positive emotions. On the other hand, it has been hypothesized that a left hemisphere (LH) dominance may be associated with a better welfare state. Here, we test the hypothesis that individual differences in the resting-state quantitative EEG power spectrum of adult horses (N = 18) and its lateralization pattern may reflect individual subjective perception of their conditions of life and welfare state. The results show clear individual differences in the proportions of the different waves and their inter-hemispheric distribution. Three different EEG power spectrum profiles were highlighted, from a bilateral predominance of theta waves in horses in a more positive welfare state to a bilateral predominance of beta waves in horses with clear expressions of compromised welfare. Interestingly, particular correlations were found between wave power activity and welfare parameters. We found a negative correlation between the number of stereotypic behaviours per hour and the median proportion of theta waves in the left hemisphere. and between the overall state (total chronic stress score) of welfare and gamma production in the right hemisphere (RH). These findings go along the hypothesis of a particular involvement of the left hemisphere for positive processing and of the right hemisphere for negative processing. However, the pattern of laterality did not appear as the most important feature here as both extreme clusters in terms of welfare showed bilateral predominance of one wave type. It is possible that hemispheric specialization makes more sense during acute emotion-inducing conditions rather than in this resting-state context (i.e. in absence of any high emotion-inducing stimulation), although the opposition gamma versus theta waves between both hemispheres in the horses with an intermediate welfare state is noticeable and intriguing. It seems that bilateral but also LH theta activity is a promising neurophysiological marker of good welfare in horses, while a bilateral or RH high production of gamma waves should alert about potential welfare alterations. Quantitative resting-state EEG power spectrum appears as a highly promising tool for exploring the brain processes involved in the subjective perception of chronic welfare, as a useful complementary tool for welfare assessment. |
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| ISSN |
0168-1591 |
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| Notes |
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Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
6628 |
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| Author |
Stomp, M.; d'Ingeo, S.; Henry, S.; Cousillas, H.; Hausberger, M. |
| Title |
Brain activity reflects (chronic) welfare state: Evidence from individual electroencephalography profiles in an animal model |
Type |
Journal Article |
| Year |
2021 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
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| Volume |
236 |
Issue |
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Pages |
105271 |
| Keywords |
Laterality; Electroencephalography; Theta wave; Welfare; Horses |
| Abstract |
Assessing the animal welfare state is a challenge given the subjective individual cognitive and emotional processing involved. Electroencephalography (EEG) spectrum analysis has proved an ecologically valid recording situation to assess the link between brain processes and affective or cognitive states in humans: a higher slow wave/fast wave ratio has been associated with a positive internal state. In particular, a high production of theta power (3-8 Hz) has been related to positive emotions. On the other hand, it has been hypothesized that a left hemisphere (LH) dominance may be associated with a better welfare state. Here, we test the hypothesis that individual differences in the resting-state quantitative EEG power spectrum of adult horses (N = 18) and its lateralization pattern may reflect individual subjective perception of their conditions of life and welfare state. The results show clear individual differences in the proportions of the different waves and their inter-hemispheric distribution. Three different EEG power spectrum profiles were highlighted, from a bilateral predominance of theta waves in horses in a more positive welfare state to a bilateral predominance of beta waves in horses with clear expressions of compromised welfare. Interestingly, particular correlations were found between wave power activity and welfare parameters. We found a negative correlation between the number of stereotypic behaviours per hour and the median proportion of theta waves in the left hemisphere. and between the overall state (total chronic stress score) of welfare and gamma production in the right hemisphere (RH). These findings go along the hypothesis of a particular involvement of the left hemisphere for positive processing and of the right hemisphere for negative processing. However, the pattern of laterality did not appear as the most important feature here as both extreme clusters in terms of welfare showed bilateral predominance of one wave type. It is possible that hemispheric specialization makes more sense during acute emotion-inducing conditions rather than in this resting-state context (i.e. in absence of any high emotion-inducing stimulation), although the opposition gamma versus theta waves between both hemispheres in the horses with an intermediate welfare state is noticeable and intriguing. It seems that bilateral but also LH theta activity is a promising neurophysiological marker of good welfare in horses, while a bilateral or RH high production of gamma waves should alert about potential welfare alterations. Quantitative resting-state EEG power spectrum appears as a highly promising tool for exploring the brain processes involved in the subjective perception of chronic welfare, as a useful complementary tool for welfare assessment. |
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0168-1591 |
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Equine Behaviour @ team @ |
Serial |
6629 |
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