Short Communication: Contrast of hemispheric lateralization for oro-facial movements between learned attention-getting sounds and species-typical vocalizations in chimpanzees: Extension in a second colony  

Oleh:

Wallez, Catherine ; Schaeffer, Jennifer ; Meguerditchian, Adrien ; Vauclair, Jacques ; Schapiro, Steven J. ; Hopkins, William D.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 123 no. 1 (2012), page 75-79.
Topik: Hemispheric specialization; Oro-facial asymmetry; Communicative behaviors; Gestural communication; Oro-facial communication; Emotions; Primates
Fulltext: 123_01_Wallez.pdf (214.54KB)

Isi artikel

Studies involving oro-facial asymmetries in nonhuman primates have largely demonstrated a right hemispheric dominance for communicative signals and conveyance of emotional information. A recent study on chimpanzee reported the first evidence of significant left-hemispheric dominance when using attention-getting sounds and rightward bias for species-typical vocalizations (Losin, Russell, Freeman, Meguerditchian, Hopkins & Fitch, 2008). The current study sought to extend the findings from Losin et al. (2008) with additional oro-facial assessment in a new colony of chimpanzees. When combining the two populations, the results indicated a consistent leftward bias for attention-getting sounds and a right lateralization for species-typical vocalizations. Collectively, the results suggest that both voluntary- controlled oro-facial and gestural communication might share the same left-hemispheric specialization and might have coevolved into a single integrated system present in a common hominid ancestor.

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