The role of cortical area V4 in complex shape discriminations was studied by testing the effects of V4 lesions in macaques on the ability to visually discriminate between images of three-dimensional (3D) objects from different viewpoints. Stimuli were presented in pairs in the lower left or lower right visual field quadrants about 4 deg from the fovea, and the monkeys judged on each trial wheth...

Neurons in cortical ventral-stream area V4 are thought to contribute to important aspects of visual processing by integrating information from primary visual cortex (V1). However, how V4 neurons respond to visual stimulation after V1 injury remains unclear: While electrophysiological investigation of V4 neurons during reversible V1 inactivation suggests that virtually all responses are eliminat...

To deepen our understanding of object recognition, it is critical to understand the nature of transformations that occur in intermediate stages of processing in the ventral visual pathway, such as area V4. Neurons in V4 are selective to local features of global shape, such as extended contours. Previously, we found that V4 neurons selective for curved elements exhibit a high degree of spatial v...

Spectral properties of 129 cells in the V4 area of 5 macaque monkeys were studied quantitatively with narrow-band and broad-band colored lights. The large majority of cells exhibited some degree of wavelength sensitivity within their receptive fields. The half-bandwidth of the primary peak in the spectral-response curve was less than 50 nm for 72% of the cells; the mean half-bandwidth of these ...

S p.17 Monday 22th September 10h-10h45 Why a conference on Science and Practice of Sports Refereeing A Lack of Interconnectivity for Research on Sport Officials p. 18 11h-12h15 Cognitive and physiological constraints on referees' performance 1 Comparison between the match demands of elite and sub-elite Australian football umpires p.20 An examination of the relationship between decision making a...

Objective: This review discusses the impact of antibiotic resistance in the intensive care unit (ICU), including the prevalence, morbidity, antibiotic resistance patterns and factors perpetuating antibiotic resistance. In addition, this describes the clinical significance of antibiotic resistance, the mechanisms of resistance, and suggests strategies to combat resistance. Summary: Antibiotic re...

experimental infection of muscovy ducks with v4 strain of newcastle disease virus was undertaken to determine the response of the ducks to the virus and the possibility of virus transmission to ducks and chickens in village like conditions. twelve ducks were randomly and equally divided into three groups of control, inoculated and in-contact. additionally, the chickens were placed into two grou...

In the root apoplasm, V(V) and V(IV) toxicity can be alleviated through redox and complexation reactions involving phenolic substances and the polyuronic components. In such context we report the role of polygalacturonic acid (PGA) on the reducing activity of caffeic acid (CAF) towards V(V). The redox reaction was particularly effective at pH 2.8 leading to the formation of oxidation products w...

The vanadium-vanadium interactions in the polygonal aggregates of d¹ vanadium(IV) atoms, with a total of 4k + 2 vanadium electrons (k an integer) imbedded in an electronically inactive borate matrix in certain vanadoborate structures are analogous to the ring carbon-carbon interactions in diamagnetic planar cyclic hydrocarbons. They thus represent a high-spin analogue of aromaticity. Thus, the ...

In contrast to pulmonary, cardiovascular, renal and neurological function, liver function is not easily monitored in the critically ill. Traditionally, the degree of liver dysfunction is assessed by using biochemical tests transaminases, bilirubin, albumin and prothrombin time. These are static tests, they only assess the presence of hepatobiliary injury and tend to respond late to damage. More...