Separate body- and world-referenced representations of visual space in parietal cortex

Article Abstract:

The direction of movement towards a visual stimulus requires a combination of visual spatial information and postural information. Similarly, to discover where something lies in the world, world-referenced postural information is needed. However, previous research has not differentiated between body-referenced and world-referenced signals in two bordering cortical fields. A new study seeks to distinguish between the two frames of reference and suggests that visual field modulations are respectively referenced to the body and the world, consistent with two streams of data being received, one for controlling gaze and the other giving navigation data.

Gaze, Visual cortex, Spatial behavior, Human spatial behavior

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Encoding of three-dimensional structure-from-motion by primate area MT neurons

Article Abstract:

Research into cortical area MT, a primate region involved in visual motion perception, has involved training two rhesus monkeys to look at a stationary target while being shown the two-dimensional projection of a revolving, random-dot cylinder. It was established that area MT is clearly specialized for motion computation, but there is growing evidence that it also plays a part in three-dimensional surface representation. It now appears that MT has a key role in structure-from-motion perception.

Neurons, Perception in animals, Animal perception

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Integration of motion and stereopsis in middle temporal cortical area of macaques

Article Abstract:

Middle temporal (MT) cortical area plays an important role in the analysis of motion signals in the visual system of macaques by integrating transparent motion and disparity. Inhibition occurs in motions signals that differ in direction in the same receptive field. While motions occurring at various depths in transparent medium are received independently, false motion signals cancel out in the MT.

Visual perception, Cerebral cortex, Macaques

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