Anatomical Study of Intrahemispheric Association Fibers in the Brains of Capuchin Monkeys (<i>Sapajus</i>sp.)

Borges, Kellen Christina Malheiros; Nishijo, Hisao; Aversi‐Ferreira, Tales Alexandre; Ferreira, Jussara Rocha; Caixeta, Leonardo

doi:10.1155/2015/648128

Cited by 10 publications

(28 citation statements)

References 45 publications

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“…Figure 4 shows these results. The tractography seeds, that is, the gray matter voxels that showed signifi- Tractography from the female-enlarged occipital and temporal cortex clusters reaches large portions of the inferotemporal cortex, likely via the inferior longitudinal fasciculus (Borges, Nishijo, Aversi-Ferreira, Ferreira, & Caixeta, 2015). Connections reach cortex surrounding the calcarine, inferior occipital, and posterior superior temporal sulci, where multiple regions in the ventral visual stream are located from V1 to TEO (Pinon et al, 1998;Rosa et al, 2000).…”

Section: Resultsmentioning

confidence: 99%

Sex differences in the brains of capuchin monkeys (Sapajus [Cebus] apella)

Hecht

Reilly

Benítez

et al. 2020

J of Comparative Neurology

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This study reports an analysis of 20 T1-weighted magnetic resonance imaging scans from tufted capuchin monkeys (5 male, 15 female). We carried out a data-driven, whole-brain volumetric analysis on regional gray matter anatomy using voxel-based morphometry. This revealed that males showed statistically significant expansion of a region of the hypothalamus, while females showed significant expansion in a distributed set of regions, including the cerebellum, early visual cortex, and higher-order visual regions spanning occipital and temporal cortex. In order to elucidate the network connectivity of these regions, we employed probabilistic tractography on diffusion tensor imaging data. This showed that the female-enlarged regions connect with distributed association networks across the brain. Notably, this contrasts with rodent studies, where sex differences are focused in deep, ancestral limbic regions involved in the control of reproductive behavior. Additionally, in our data set, for several regions, male and female volumetric measures were completely nonoverlapping. This contrasts with human studies, where sex differences in cortical regions have been reported but are characterized by overlapping rather than divergent male and female values. We suggest that these results can be understood in the context of the different lifetime experiences of males and females, which may produce increased experience-dependent cortical plasticity in capuchins compared to rodents, and in humans compared to capuchins.

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Section: Resultsmentioning

confidence: 99%

Sex differences in the brains of capuchin monkeys (Sapajus [Cebus] apella)

Hecht

Reilly

Benítez

et al. 2020

J of Comparative Neurology

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“…Some characteristics of Sapajus among primate species/genera could be explained by anatomical details [ 21 – 24 ]. M. fuscata displays characteristic behaviours such as stone handling [ 4 ], locomotor behaviour, gait position, and intermittent bipedalism, which could be explained by detailed anatomical studies.…”

Section: Introductionmentioning

confidence: 99%

Comparative Gross Anatomy of the Forelimb Arteries of the Japanese Monkey (Macaca fuscata) and a Comparative Pattern of Forelimb Arterial Distribution in Primates

Aversi‐Ferreira

Freitas‐Ferreira

Aversi-Ferreira

et al. 2020

BioMed Research International

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Macaca fuscata displays characteristic behaviours, such as stone handling, locomotor behaviour, gait position, and intermittent bipedalism. Differences in characteristic behaviours among primate species/genera could be explained by anatomical details of the body. However, the anatomical details have not been well studied in Macaca fuscata. Arterial models could be one of the anatomical bases for the phylogenetic and functional differences among species, since the arterial supply could be associated with the muscular performance, especially locomotor behaviour. In this study, five thoracic limbs of Macaca fuscata adults were dissected to analyse the vessels. Patterns of arterial distribution in the thoracic limbs of Macaca fuscata were compared with those in other primates. The results indicated that the arterial distribution in the Japanese monkeys was more similar to those in Macaca mulatta and Papio anubis, which is consistent with phylogenetic similarities. However, compared with Papio anubis and other macaques, there were anatomical differences in several points, including (1) the origin of the common, anterior, posterior circumflex, and profunda brachii, and (2) the origins of the collateralis ulnaris artery. The comparative anatomy of the arteries in the forelimb of Macaca fuscata, along with the anatomical studies in other primates, indicated characteristic patterns of brachial artery division and the number of the palmar arches in primates, which is consistent with the phylogenetic division among New World primates, Old World primates, and apes.

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“…Previously, anatomical and neuroimaging techniques have been used for investigating U-fiber regions in humans, monkeys, ferrets and mice. These pioneering studies demonstrated that humans have larger U-fiber regions than monkeys [7,8] but failed to identify U-fibers in mice [23]. These studies also showed that U-fibers are involved in various neurological and psychiatric diseases in humans [9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Discussionmentioning

confidence: 99%

“…U-fibers are thought to mediate important higher-order cognitive functions of the nervous system [3,5]. Consistently, while U-fibers are observed in both humans and monkeys [3,6], they take up a larger proportion of the cerebrum in humans than they do in monkeys [7,8].…”

Section: Introductionmentioning

confidence: 95%

The origin and development of subcortical U-fibers in gyrencephalic ferrets

et al. 2020

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In the white matter of the human cerebrum, the majority of cortico-cortical fibers are of short range, connecting neighboring cortical areas. U-fibers represent connections between neighboring areas and are located in the white matter immediately deep to the cerebral cortex. Using gyrencephalic carnivore ferrets, here we investigated the neurochemical, anatomical and developmental features of U-fibers. We demonstrate that U-fibers were derived from neighboring cortical areas in ferrets. U-fiber regions in ferrets were intensely stained with Gallyas myelin staining and Turnbull blue iron staining. We further found that U-fibers were derived from neurons in both upper and lower layers in neighboring areas of the cerebral cortex and that U-fibers were formed later than axons in the deep white matter during development. Our findings shed light on the fundamental features of U-fibers in the gyrencephalic cerebral cortex. Because genetic manipulation techniques for ferrets are now available, ferrets should be an important option for investigating the development, functions and pathophysiological changes of U-fibers.

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Anatomical Study of Intrahemispheric Association Fibers in the Brains of Capuchin Monkeys (Sapajussp.)

Cited by 10 publications

References 45 publications

Sex differences in the brains of capuchin monkeys (Sapajus [Cebus] apella)

Sex differences in the brains of capuchin monkeys (Sapajus [Cebus] apella)

Comparative Gross Anatomy of the Forelimb Arteries of the Japanese Monkey (Macaca fuscata) and a Comparative Pattern of Forelimb Arterial Distribution in Primates

The origin and development of subcortical U-fibers in gyrencephalic ferrets

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