Orbital prefrontal cortex volume predicts social network size: an imaging study of individual differences in humans

Contenu

Titre

Orbital prefrontal cortex volume predicts social network size: an imaging study of individual differences in humans

Proceedings of the Royal Society B: Biological Sciences

Date de soumission

16 août 2012 à 12:34:52 +00:00

Créateur

Joanne Powell

Penelope A. Lewis

Neil Roberts

Marta García-Fiñana

R. I. M. Dunbar

Est référencé par

UIVJMUTH

Résumé

The social brain hypothesis, an explanation for the unusually large brains of primates, posits that the size of social group typical of a species is directly related to the volume of its neocortex. To test whether this hypothesis also applies at the within-species level, we applied the Cavalieri method of stereology in conjunction with point counting on magnetic resonance images to determine the volume of prefrontal cortex (PFC) subfields, including dorsal and orbital regions. Path analysis in a sample of 40 healthy adult humans revealed a significant linear relationship between orbital (but not dorsal) PFC volume and the size of subjects' social networks that was mediated by individual intentionality (mentalizing) competences. The results support the social brain hypothesis by indicating a relationship between PFC volume and social network size that applies within species, and, more importantly, indicates that the relationship is mediated by social cognitive skills.

Date

1 février 2012

Titre abrégé

Proc. R. Soc. B

Orbital prefrontal cortex volume predicts social network size

Langue

en

doi

10.1098/rspb.2011.2574

issn

0962-8452, 1471-2954

uri

http://rspb.royalsocietypublishing.org/content/early/2012/01/27/rspb.2011.2574

Source

rspb.royalsocietypublishing.org

lccn

0002

is compiled by

Lucky Semiosis

is in semantic relation with

prefrontal cortex

stereology

MRI

social network

Complexité

475

Date de modification

8 septembre 2023 à 06:50:20 +00:00

Détails de la complexité

Physique,1,,,,,25,25

Physique,2,,,,,44,88

Actant,2,,,,,6,12

Concept,1,,,,,24,24

Concept,2,,,,,47,94

Rapport,1,1,Physique,Concept,properties,24,24

Rapport,1,1,Physique,Physique,values,24,24

Rapport,1,1,Physique,Actant,dcterms:creator,5,5

Rapport,2,2,Actant,Concept,properties,29,58

Rapport,2,2,Actant,Physique,values,29,58

Rapport,1,1,Physique,Actant,cito:isCompiledBy,1,1

Rapport,1,1,Physique,Concept,skos:semanticRelation,4,4

Rapport,2,2,Concept,Concept,properties,12,24

Rapport,2,2,Concept,Physique,values,12,24

Rapport,1,1,Physique,Physique,media,1,1

Rapport,2,2,Physique,Concept,properties,2,4

Rapport,2,2,Physique,Physique,values,2,4

Rapport,1,1,Physique,Physique,uri,1,1

Totaux de la complexité

Physique,2,1,2,69,113

Actant,1,2,2,6,12

Concept,2,1,2,71,118

Rapport,13,1,2,146,232

Existence,18,1,2,292,475

523

Date de modification

8 janvier 2024 à 10:51:30 +00:00

Détails de la complexité

dimension,niv (sujet),niv objet,sujet,objet,prédicat,nb,c

Physique,1,,,,,25,25

Physique,2,,,,,57,114

Actant,1,,,,,1,1

Actant,2,,,,,6,12

Concept,1,,,,,15,15

Concept,2,,,,,52,104

Rapport,1,1,Actant,Concept,properties,15,15

Rapport,1,1,Actant,Physique,values,24,24

Rapport,1,1,Actant,Physique,owner,1,1

Rapport,2,1,Actant,Physique,oa:hasSource,4,8

Rapport,2,2,Actant,Concept,properties,48,96

Rapport,2,2,Actant,Physique,values,48,96

Rapport,1,1,Actant,Actant,dcterms:creator,5,5

Rapport,1,1,Actant,Actant,cito:isCompiledBy,1,1

Rapport,1,1,Actant,Concept,skos:semanticRelation,4,4

Rapport,1,1,Actant,Physique,media,1,1

Rapport,1,1,Actant,Physique,uri,1,1

Totaux de la complexité

Physique,2,1,2,82,139

Actant,2,1,2,7,13

Concept,2,1,2,67,119

Rapport,11,1,2,152,252

Existence,17,1,2,308,523,

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