Orthogonal motion after-effect illusion predicted by a model of cortical motion processing

Article Abstract:

A model of cortical motion processing predicts that adaptation to motion occurring at the same time in the opposite directions leads to an orthogonal motion after-effect illusion. Broadly tuned inhibitory interactions occur in the cortical area MT consisting of the motion-sensitive neurons. These interactions are necessary for the integration and segregation of the motion signals. Narrowly tuned excitation interactions are responsible for the global integration of the motion signals.

Physiological aspects, Motion perception (Vision), Motion perception, Optical illusions

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Primate spinal interneurons show pre-movement instructed delay activity

Article Abstract:

Spinal interneurons show early pre-movement delay activity, different from their responses during muscle activity. The delay activity is similar to the set-related activity seen in certain supraspinal areas, suggesting that movement preparation occurs simultaneously over widely distributed areas, including spinal levels.

Neurology

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Motor-cortical activity in tetraplegics

Article Abstract:

Research is presented describing developments made in the field of bioengineering which could eventually lead to paralysed patients having their motor-cortical activity restored.

Care and treatment, Quadriplegia

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