Anatomical Study of the Main Sulci and Gyri

of the Cebus Libidinosus Brain (Rylands, 2000)

Estudo Anatômico dos Principais Sulcos e Giros do

Cérebro de Cebus Libidinosus (Rylands, 2000)

Jarbas  Pereira-de-Paula1,4;  Yandra Cássia  Lobato do  Prado2,4;  Carlos  Tomaz3; Tales Alexandre Aversi- Ferreira4*

ABSTRACT

The purpose  of this work was  to  study the  brain  of the  Cebus  genus  in morphological  terms  to evidence the main gyri and sulci, the gyrenchepaly degree,  the encephalization  index and the measure  of the main  structures, to compare  the results with literature data  in humans,  chimpanzees,  baboons  and  others nonhuman  primates. Four specimens of adult and healthy Cebus libidinosus were used. All animals, donated by IBAMA-GO, were sacrificed by lethal injection of sodium pentobarbital.  The animals  were conserved  on

10%  formaldehyde  in  closed  opaque  box  and  deposited  in  the  anatomical   collection  from  the  Federal University of  Goiás.   Brains  were  removed  from  the  skull,  weighed  and   measured   with a  caliper  and documented  with digital camera.  The gyri, sulci and other structures denomination  were described according to descriptions from humans  and  other primates.  In general,  the results indicate that the morphology of the gyri and sulci of the C.l. brain is closer to baboons than to chimpanzees and humans.

KEYWORDS: anatomy, Cebus, brain, gyri and sulci