Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
, 48 (3), 121-9

Unusual Pattern of Retinogeniculate Projections in the Controversial Primate Tarsius

Affiliations

Unusual Pattern of Retinogeniculate Projections in the Controversial Primate Tarsius

M G Rosa et al. Brain Behav Evol.

Abstract

Studies of simian and prosimian primates have demonstrated a remarkable interspecific constancy in the pattern of innervation of the magnocellular and parvocellular layers of the dorsal lateral geniculate nucleus (dLGN) by retinal afferents. The characteristic organization of this nucleus in primates, as well as its apparent phylogenetic stability, have led to the proposal that the distinct laminar arrangement of the dLGN is one of the diagnostic characters that define the Order Primates. Here, we describe the distribution of retinal afferents to the dLGN of Tarsius, the single contemporary member of an ancient lineage of primates. In this genus, the more superficial layer of the dLGN receives projections from the ipsilateral eye, a unique situation among the members of the Order Primates. This observation adds support to the proposal that Tarsius does not share a more recent common ancestry with simians as compared with lemuriform and lorisiform primates.

Similar articles

See all similar articles

Cited by 8 PubMed Central articles

See all "Cited by" articles

LinkOut - more resources

Feedback