Exploring the relationship between cerebellar asymmetry and handedness in chimpanzees (Pan troglodytes) and capuchins (Cebus apella)

Phillips, Kimberley A.; Hopkins, William D.

doi:10.1016/j.neuropsychologia.2007.02.010

Cited by 35 publications

(34 citation statements)

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“…In the cerebellum, anteriorly left-biased and posterior right-biased absolute volumes of the cerebellum were reported as an intrinsic cerebellar asymmetry [13,34], indicating a clockwise cerebellar torque. A similar clockwise torque pattern was seen in the cerebellum of chimpanzees [14]. In contrast, a counterclockwise cerebellar torque (rostrally leftward biased, and caudally rightward biased or symmetrical) was revealed in the cerebellum of ferrets [15].…”

Section: Discussionsupporting

confidence: 62%

“…The direction and extent of the cerebellar torque asymmetry varied depending on species [13,14,34], the hand preference [13], and/or sex [34], independent of genetic factors [13]. The extent of torque asymmetry and the volume laterality of the cerebellum were more enhanced in males than in females in ferrets [15], as well as humans [34].…”

Section: Discussionmentioning

confidence: 99%

“…The cerebellar torque asymmetry was reportedly clockwise in primates such as humans [13] and chimpanzees [14], but counterclockwise torque asymmetry was observed in carnivores, such as ferrets [15].…”

Section: Introductionmentioning

confidence: 98%

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Age-Dependent Sexually-Dimorphic Asymmetric Development of the Ferret Cerebellar Cortex

Sawada

Aoki

2017

Symmetry

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Abstract:A three-dimensional (3D) T 1 -weighted Magnetic Resonance Imaging (MRI) at 7-Tesla system was acquired with a high spatial resolution from fixed brains of male and female ferrets at postnatal days (PDs) 4 to 90, and their age-related sexual difference and laterality were evaluated by MRI-based ex vivo volumetry. The volume of both left and right sides of cerebellar cortex was larger in males than in females on PD 10 and thereafter. When the cerebellar cortex was divided into four transverse domains, i.e., anterior zone (AZ; lobules I-V), central zone (CZ; lobules VI and VII), posterior zone (PZ; lobules VIII-IXa), and nodular zone (NZ; lobules IXb and X), an age-related significantly greater volume in males than in females was detected on either side of all four domains on PD 42 and of the AZ on PD 90, but only on the left side of the PZ on PD 90. Regarding the volume laterality, significant leftward asymmetry was obtained in the CZ and PZ volumes in males, but not in females on PD 90. From asymmetry quotient (AQ) analysis, AQ scores were rightward in the AZ in both sexes already on PD 21, but gradually left-lateralized only in males in the CZ, PZ, and NZ during PDs 42 to 90. The present study suggests that a characteristic counterclockwise torque asymmetry (rostrally right-biased, and caudally left-biased or symmetrical) is acquired in both sexes of ferrets during PDs 42 to 90, although the leftward laterality of the posterior half of the cerebellum was more enhanced in males.

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Section: Discussionsupporting

confidence: 62%

Section: Discussionmentioning

confidence: 99%

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Age-Dependent Sexually-Dimorphic Asymmetric Development of the Ferret Cerebellar Cortex

Sawada

Aoki

2017

Symmetry

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“…One aim of this study was to examine whether chimpanzees show any evidence of a torque asymmetry in the cerebellum, such as that described by Snyder et al (1995). A preliminary comparative study between 16 capuchin monkeys and chimpanzees showed that apes had a rightward asymmetry in the anterior but not posterior region of the cerebellum (Phillips & Hopkins, 2007), and the goal of the present study was to more fully explore the potential influence of sex, rearing history, and age on cerebellar volume and lateralization.The second aim of this study was to assess the potential association between handedness and lateralization in the cerebellum. Phillips and Hopkins (2007) failed to find an association between handedness for coordinated bimanual actions and cerebellar asymmetries in their smaller sample of chimpanzees, although the association was significant in the capuchin monkeys.…”

mentioning

confidence: 91%

“…A preliminary comparative study between 16 capuchin monkeys and chimpanzees showed that apes had a rightward asymmetry in the anterior but not posterior region of the cerebellum (Phillips & Hopkins, 2007), and the goal of the present study was to more fully explore the potential influence of sex, rearing history, and age on cerebellar volume and lateralization.…”

mentioning

confidence: 97%

Handedness for tool use correlates with cerebellar asymmetries in chimpanzees (Pan troglodytes).

Cantalupo¹,

Freeman²,

Rodes³

et al. 2008

Behavioral Neuroscience

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Recent studies have shown that great ape species possess patterns of macrostructural neocortical asymmetries that are similar to those found in humans. However, little is known about the asymmetry of subcortical structures in great apes. To address this lack of data, the authors assessed left-right asymmetry of the anterior and posterior aspects of cerebellum from MRI brain scans of 53 chimpanzees (Pan troglodytes). No population-level bias was found for either the anterior or the posterior region of the cerebellum. However, a significant inverse association was found in the asymmetry quotients of the anterior and posterior regions, indicating that the cerebellum was torqued at the individual level. Additionally, handedness for tool use but not other measures was associated with variation in cerebellar asymmetries. Last, older chimpanzees had a smaller cerebellum after brain volume was adjusted for. The results are discussed in the context of brain changes in primate evolution related to tool use. Keywordscerebellum; torque; tool use; handedness; chimpanzee Over the last 5 years, an increasing body of evidence has shown the presence of macrostructural asymmetries in the great ape brain that closely resemble well-known patterns of asymmetry in the human brain Pilcher, Hammock, & Hopkins, 2001). Most of these studies have focused on the neocortex, particularly on regions believed to be homologous to cortical areas of the human brain involved in linguistic functions. For example, in great apes, as in humans, the sylvian fissure has been reported to be longer in the left hemisphere, particularly in its postcentral region Hopkins, Pilcher, & MacGregor, 2000;Yeni-Komshian & Benson, 1976). Similarly, leftward cortical asymmetries in great apes and humans have been reported for the planum temporale, an area located on the superior temporal gyrus, which coincides with part of Wernicke's area Correspondence concerning this article should be addressed to Claudio Cantalupo, Department of Psychology, Clemson University, Clemson, SC 29634. E-mail: ccantal@clemson.edu. Galaburda, 1995;Gannon, Holloway, Broadfield, & Braun, 1998;Gilissen, 2001;Hopkins, Marino, Rilling, & MacGregor, 1998). A number of studies have also reported leftward asymmetries in the frontal operculum in the inferior frontal lobe, commonly believed to contain part of Broca's area (Amunts et al., 1999;Cantalupo & Hopkins, 2001;Foundas, Eure, Luevano, & Weinberger, 1998), although the scope of this finding remains to be fully assessed (Sherwood, Broadfield, Holloway, Gannon, & Hof, 2003;Watkins et al., 2001). Some studies have revealed converging asymmetry patterns also in other regions of the great ape and human brain. For example, the great ape brain has been found to show the same frontal (right > left) and occipital (left > right) petalias, also known as developmental torque, consistently reported in the human literature (Holloway & De La Coste-Lareymondie, 1982;Hopkins & Marino, 2000;LeMay, 1976LeMay, , 1982LeMay, , 1985Pilcher et al., 2001). Fi...

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Consistency of hand preference across low‐level and high‐level tasks in Capuchin monkeys (Cebus apella)

Lilak

Phillips

2007

American J Primatol

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Numerous studies investigating behavioral lateralization in capuchins have been published. Although some research groups have reported a population-level hand preference, other researchers have argued that capuchins do not show hand preference at the population level. As task complexity influences the expression of handedness in other primate species, the purpose of this study was to collect hand preference data across a variety of high- and low-level tasks to evaluate how task complexity influences the expression of hand preference in capuchins. We tested eleven captive brown capuchin monkeys (Cebus apella) to determine if they show consistent hand preferences across multiple high- and low-level tasks. Capuchins were expected to display high intertask consistency across the high-level tasks but not the low-level tasks. Although most individuals showed significant hand preferences for each task, only two of the high-level tasks that involved similar hand motions were significantly positively correlated, indicating consistency of hand preference across these tasks only. None of the tasks elicited a group-level hand preference. High-level tasks elicited a greater strength of hand preference than did low-level tasks. No sex differences were found for the direction or strength of hand preference for any task. These results contribute to the growing database of primate laterality and provide additional evidence that capuchins do not display group-level hand preferences.

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Exploring the relationship between cerebellar asymmetry and handedness in chimpanzees (Pan troglodytes) and capuchins (Cebus apella)

Cited by 35 publications

References 46 publications

Age-Dependent Sexually-Dimorphic Asymmetric Development of the Ferret Cerebellar Cortex

Age-Dependent Sexually-Dimorphic Asymmetric Development of the Ferret Cerebellar Cortex

Handedness for tool use correlates with cerebellar asymmetries in chimpanzees (Pan troglodytes).

Consistency of hand preference across low‐level and high‐level tasks in Capuchin monkeys (Cebus apella)

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