![]() |
||||||||||||
![]() |
||||||||||||
LECTURERS ABSTRACTS the times and dates to be discussed. |
||||||||||||
SECURITY AND PRIVACY IN THE DIGITAL AGE |
||||||||||||
-"GRAZING INCIDENCE OPTICS: HOW TO MESURE MIRRORS WITH A NANOMETER ACCURACY?
|
||||||||||||
UNSOLVED MYSTERIES OF METEOR SCIENCE: strange sounds, puzzling radiation and unexplained micro-physics of meteors REPRESENTATION OF SPACE IN THE BRAIN ABSTRACT: Located at the cross-roads of the sensory and motor pathways, the posterior parietal cortex (PPC) gives rise to many higher cognitive functions such as spatial awareness, attention, motion perception, and intentions. Andersen Lab at Caltech is studying a neural basis of cognition utilizing neurophysiological, psychophysical, anatomical, functional magnetic resonance imaging, and theoretical techniques. Understanding of the parietal cortex can one day result in neuronal implants which would allow paralyzed patients to control prosthetic devices purely on the visual feedback system in the brain. My research involves understanding how the parietal cortex processes visual and auditory signals of objects, and converts this information to a motoric action such as reach. This requires neurons in the parietal cortex to preform coordinate transformation from the sensory reference frame to the motor reference frame. For example, a position of a coffee cup is encoded in the eye reference frame, and in order to reach for that cup, we have to "know" its position with respect to our hand. Experiments have shown that the activity of a neuron that does the "calculation" is modulated by eye, head and hand position. The mathematics of the neurons in the parietal cortex is studied through neural networks and the properties that arise in the network through its training. |
||||||||||||
| [Home] [Projects] [Programe] [Lecturers] [Excursion] [Applicat. form] [Sponsors] [Various] [news] | ||||||||||||