PET Study of Pointing With Visual Feedback of Moving Hands

Inoue, Kentaro, Ryuta Kawashima, Kazunori Satoh, Shigeo Kinomura, Ryoi Goto, Masamichi Koyama, Motoaki Sugiura, Masatoshi Ito, and Hiroshi Fukuda. PET study of pointing with visual feedback of moving hands. J. Neurophysiol. 79: 117–125, 1998. This study was conducted to determine where in the human brain visual feedback of hand movements is processed to allow accurate pointing. Regional cerebral blood flow (rCBF) was measured with positron emission tomography (PET) and H2 15O in nine normal volunteers while performing one control and two reaching tasks. In all tasks, visual stimuli were presented on a head mounted display (HMD). A target board was placed in front of the subjects bearing six red light-emitting diodes (LEDs) aligned on a circle with a green LED at its center. The center green LED and one of the six red LEDs, randomly selected, were repeatedly switched on and off, alternatively. In the control task, subjects were instructed to gaze at the lit LED. In the two reaching tasks, the reaching with...