It has been suggested that emotional visual input is processed along both a slower cortical pathway and a faster subcortical pathway which comprises the lateral geniculate nucleus (LGN), the superior colliculus, the pulvinar, and finally the amygdala. However, anatomical as well as functional evidence concerning the subcortical route is lacking. Here, we adopt a computational approach in order ...

Extraclassical surround suppression is a prominent receptive field property of neurons in the lateral geniculate nucleus (LGN) of the dorsal thalamus, influencing stimulus size tuning, response gain control, and temporal features of visual responses. Despite evidence for the involvement of both retinal and nonretinal circuits in the generation of extraclassical suppression, we lack an understan...

There is considerable controversy over the existence of orientation and direction sensitivity in lateral geniculate nucleus (LGN) neurons. Claims for the existence of these properties often were based upon data from cells tested well beyond their peak spatial frequencies. The goals of the present study were to examine the degree of orientation and direction sensitivity of LGN cells when tested ...

Hubel and Wiesel (1962) rst distinguished \simple" from \complex" cells in visual cortex, and proposed a processing hierarchy in which rows of LGN cells are pooled to drive oriented simple cell subunits, which are pooled in turn to drive complex cells. Though parsimonious and highly in uential, the pure hierarchical model has since been challenged by results indicating many complex cells receiv...

High-intensity photocoagulator lesions placed nasally to the optic disc one eye destroyed all retinal layers and led to visual deafferentation of the lateral part of layer A in the contralateral lateral geniculate nucleus (LGN) of adult cats. The retino-geniculate topography was determined with vertical tungsten microelectrode penetrations through LGN layers A and A1 before and at different tim...

We introduce a probabilistic sequential algorithm for stable sorting n uniformly distributed keys in an arbitrary range. The algorithm runs in linear time and sorts all but a very small fraction 2−Ω(n) of the input sequences; the best previously known bound was 2−Ω(n/(lg n lg lgn)). An EREW PRAM extension of this sequential algorithm sorts in O((n/p + lg p) lg n/ lg (n/p + lg n)) time using p ≤...

Visual responses in the cortex and lateral geniculate nucleus (LGN) are often associated with synchronous oscillatory patterning. In this short review, we examine the possible relationships between subcortical and cortical synchronization mechanisms. Our results obtained from simultaneous multi-unit recordings show strong synchronization of oscillatory responses between retina, LGN and cortex, ...

2 Summary 1. We examined the receptive properties of the Koniocellular (K), Magnocellular (M), and Parvocellular (P) cells in the lateral geniculate nucleus (LGN) of the New world nocturnal simian owl monkey, aiming to characterize receptive field properties of K LGN cells by comparing the K cell properties with those of M and P LGN cells. The key objective of the present study was to proceed b...

1. We examined the receptive properties of the Koniocellular (K), Magnocellular (M), and Parvocellular (P) cells in the lateral geniculate nucleus (LGN) of the New world nocturnal simian owl monkey, aiming to characterize receptive field properties of K LGN cells by comparing the K cell properties with those of M and P LGN cells. The key objective of the present study was to proceed by analogy ...