Records |
Author |
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 ![sorted by Volume (numeric) field, ascending order (up)](img/sort_asc.gif) |
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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Equine Behaviour @ team @ |
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5358 |
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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 ![sorted by Volume (numeric) field, ascending order (up)](img/sort_asc.gif) |
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. |
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University of Rome La Sapienza |
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English |
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0031-5125 |
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PMID:10710755 |
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no |
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refbase @ user @ |
Serial |
94 |
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Author |
Murphy, J.; Sutherland, A.; Arkins, S. |
Title |
Idiosyncratic motor laterality in the horse |
Type |
Journal Article |
Year |
2005 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
Volume ![sorted by Volume (numeric) field, ascending order (up)](img/sort_asc.gif) |
91 |
Issue |
3-4 |
Pages |
297-310 |
Keywords |
Horse; Idiosyncratic motor behaviour; Laterality; Sidedness |
Abstract |
Idiosyncratic motor behaviour was investigated during four experimental procedures in 40 horses (males = 20, females = 20) to establish if horses revealed evidence of significant right or left laterality. The experimental procedures included (1) detection of the preferred foreleg to initiate movement (walk or trot), (2) obstacle avoidance within a passageway (right or left), (3) obstacle avoidance when ridden and (4) idiosyncratic motor bias when rolling. The influence of the horses' sex on both the direction and the degree of the laterality was explored within and between experimental procedures. The findings showed that the direction, but not the degree of idiosyncratic motor preference in the horses was strongly sex-related. Male horses exhibited significantly more (t = 3.74, d.f. = 79, P < 0.001) left lateralised responses and female horses exhibited significantly more (t = -6.35, d.f. = 79, P < 0.01) right lateralised responses. There was also significant positive correlation (P < 0.05) between four of six possible inter-experimental relationships. The results suggest two discrete trends of laterality associated with the sex of the horse. The primary cause of idiosyncratic motor laterality may be genetically predetermined, influenced by environmental factors or a combination of these two and the current findings may support the development of sex-specific training schedules for the horse. Further, work in this area might assist in defining the mechanisms of brain hemisphere lateralisation and allocation of cognitive function in the horse. |
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refbase @ user @ |
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527 |
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Author |
Pell, M.D. |
Title |
Cerebral mechanisms for understanding emotional prosody in speech |
Type |
Journal Article |
Year |
2006 |
Publication |
Brain and Language |
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96 |
Issue |
2 |
Pages |
221-234 |
Keywords |
Emotion; Prosody; Speech; Laterality; Brain-damaged; Patient study; Sentence processing; Social cognitive neuroscience |
Abstract |
Hemispheric contributions to the processing of emotional speech prosody were investigated by comparing adults with a focal lesion involving the right (n = 9) or left (n = 11) hemisphere and adults without brain damage (n = 12). Participants listened to semantically anomalous utterances in three conditions (discrimination, identification, and rating) which assessed their recognition of five prosodic emotions under the influence of different task- and response-selection demands. Findings revealed that right- and left-hemispheric lesions were associated with impaired comprehension of prosody, although possibly for distinct reasons: right-hemisphere compromise produced a more pervasive insensitivity to emotive features of prosodic stimuli, whereas left-hemisphere damage yielded greater difficulties interpreting prosodic representations as a code embedded with language content. |
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Equine Behaviour @ team @ |
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4637 |
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Author |
McGreevy, P.D.; Thomson, P.C. |
Title |
Differences in motor laterality between breeds of performance horse |
Type |
Journal Article |
Year |
2006 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
Volume ![sorted by Volume (numeric) field, ascending order (up)](img/sort_asc.gif) |
99 |
Issue |
1-2 |
Pages |
183-190 |
Keywords |
Horse; Lateralisation; Laterality; Breed; Training |
Abstract |
This study examined the relationship between motor laterality in horses bred for different types of work and therefore different temperaments. Foreleg preference during grazing was measured in three populations of domestic horse, Thoroughbreds (TB, bred to race at the gallop), Standardbreds (SB, bred for pacing) and Quarter Horses (QH, in this case bred for so-called “cutting work” which involves manoeuvring individual cattle in and out of herds). With a one-sample t-test, TBs showed strong evidence of a left preference in motor laterality (P = 0.000), as did SBs (P = 0.002) but there was no convincing evidence for laterality in QH (P = 0.117). However, the increasing trend in left preference from QH to SBs then TBs was associated with increasing differences between individual horses within a breed. The overall preference (either left or right) increased with age (P = 0.008) and the rate of increase varied with breeds. The presence of a higher proportion of left-foreleg preferent individuals in TBs and SBs compared with QH may indicate that their training or selection (or both) has an effect on motor bias. |
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1828 |
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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 |
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Journal Article |
Year |
2011 |
Publication |
Physiology & Behavior |
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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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0031-9384 |
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Equine Behaviour @ team @ |
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5688 |
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Author |
Lucidi, P.; Bacco, G.; Sticco, M.; Mazzoleni, G.; Benvenuti, M.; Bernabò, N.; Trentini, R. |
Title |
Assessment of motor laterality in foals and young horses (Equus caballus) through an analysis of derailment at trot |
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Journal Article |
Year |
2013 |
Publication |
Physiology & Behavior |
Abbreviated Journal |
Physiol. Behav. |
Volume ![sorted by Volume (numeric) field, ascending order (up)](img/sort_asc.gif) |
109 |
Issue |
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Pages |
8-13 |
Keywords |
Horse; Laterality; Longeing; Sidedness |
Abstract |
The conflicting results regarding the study of motor laterality in horses may indicate that there does not exist a proper method to assess the degree and the direction of motor bias in these animals. Unfortunately, even less is known about the development of laterality in horses, and to what extent early manipulations can still exert their effects in adulthood. We propose a new method that can be easily applied at a very early age thus avoiding testing adult horses eventually biased by human handling and/or training. Forty-six horses (29 nine-month-old foals and 17 two-year old horses) were handled since birth bilaterally and housed in groups in wide areas. At the time of the analysis, in order to minimize environmental and sensorial disturbances, each horse was tested in a round pen individually or as dyad mother-foal. The ability/inability to properly execute a circle at trot was then recorded, assuming the direction of derailment, i.e. the cutting of the circle, as an indicator of motor bias. From the results of the study it is arguable that motor laterality in horses is acquired over time: in fact foals tested while their mothers were being subjected to longeing showed a higher percentage of ambidextrous animals, while two-year-old horses appeared biased toward the right (p<0.05). Results are discussed in the light of the scientific knowledge about equine biomechanics, taking into account horses' locomotion that leads to the advancement of the body mass through the activation of a kinetic chain that originates from the hindquarters. |
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0031-9384 |
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Equine Behaviour @ team @ |
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6666 |
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Author |
Giljov, A.; Karenina, K. |
Title |
Differential roles of the right and left brain hemispheres in the social interactions of a free-ranging ungulate |
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Journal Article |
Year |
2019 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
Volume ![sorted by Volume (numeric) field, ascending order (up)](img/sort_asc.gif) |
168 |
Issue |
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Pages |
103959 |
Keywords |
Laterality; Hemispheric specialization; Brain asymmetry; Eye preference; Ungulate; Bovid |
Abstract |
Despite the abundant empirical evidence on lateralized social behaviours, a clear understanding of the relative roles of two brain hemispheres in social processing is still lacking. This study investigated visual lateralization in social interactions of free-ranging European bison (Bison bonasus). The bison were more likely to display aggressive responses (such as fight and side hit), when they viewed the conspecific with the right visual field, implicating the left brain hemisphere. In contrast, the responses associated with positive social interactions (female-to-calf bonding, calf-to-female approach, suckling) or aggression inhibition (fight termination) occurred more likely when the left visual field was in use, indicating the right hemisphere advantage. The results do not support either assumptions of right-hemisphere dominance for control of various social functions or hypotheses about simple positive (approach) versus negative (withdrawal) distinction between the hemispheric roles. The discrepancy between the studies suggests that in animals, the relative roles of the hemispheres in social processing may be determined by a fine balance of emotions and motivations associated with the particular social reaction difficult to categorize for a human investigator. Our findings highlight the involvement of both brain hemispheres in the control of social behaviour. |
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0376-6357 |
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Equine Behaviour @ team @ |
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6587 |
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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? |
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Journal Article |
Year |
2006 |
Publication |
Behavioural Brain Research |
Abbreviated Journal |
Behav. Brain. Res. |
Volume ![sorted by Volume (numeric) field, ascending order (up)](img/sort_asc.gif) |
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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0166-4328 |
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Equine Behaviour @ team @ |
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5347 |
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Author |
Versace, E.; Morgante, M.; Pulina, G.; Vallortigara, G. |
Title |
Behavioural lateralization in sheep (Ovis aries) |
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Journal Article |
Year |
2007 |
Publication |
Behavioural Brain Research |
Abbreviated Journal |
Behav. Brain. Res. |
Volume ![sorted by Volume (numeric) field, ascending order (up)](img/sort_asc.gif) |
184 |
Issue |
1 |
Pages |
72-80 |
Keywords |
Lateralization; Laterality; Brain asymmetry; Hemisphere; Sheep; Lamb; Strength of lateralization |
Abstract |
This study investigates behavioural lateralization in sheep and lambs of different ages. A flock was tested in a task in which the animals were facing an obstacle and should avoid it on either the right or left side to rejoin flock-mates (adult sheep) or their mothers (lambs). A bias for avoiding the obstacle on the right side was observed, with lambs apparently being more lateralized than sheep. This right bias was tentatively associated with the left-hemifield laterality in familiar faces recognition which has been documented in this species. Differences between adult sheep and lambs were likely to be due to differences in social reinstatement motivation elicited by different stimuli (flock-mates or mothers) at different ages. Preferential use of the forelegs to step on a wood-board and direction of jaw movement during rumination was also tested in adult animals. No population bias nor individual-level lateralization was observed for use of the forelegs. At the same time, however, there was a large number of animals showing individual-level lateralization for the direction of jaw movement during rumination even though there was no population bias. These findings highlight that within the same species individual- and population-level lateralization can be observed in different tasks. Moreover, the results fit the general hypothesis that population-level asymmetries are more likely to occur in tasks that require social coordination among behaviourally asymmetric individuals. |
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0166-4328 |
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Equine Behaviour @ team @ |
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6701 |
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