PET study of pointing with visual feedback of moving hands

Journal of Neurophysiology
K InoueHiroshi Fukuda

Abstract

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 visual feedback (RwithF) task and the reaching without visual feedback (RwithoutF) task, they had to point to the lit red LED with their right index fingers. In the RwithF task, their right hands were visible on the HMD before touching the target, whereas in the RwithoutF task, they were not visible. For each subject, subtraction images of each reaching task minus the control and the RwithF task minus the RwithoutF task were calculated after transformation of PET i...Continue Reading

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Citations

Jan 19, 2007·The Neuroscientist : a Review Journal Bringing Neurobiology, Neurology and Psychiatry·Simon ClavagnierMarie-Thérèse Perenin
Mar 17, 2009·Experimental Brain Research·Britne A Shabbott, Robert L Sainburg
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Dec 16, 2010·The European Journal of Neuroscience·James K R StevensonMartin J McKeown
Mar 4, 2003·Journal of Neurophysiology·Xuguang LiuR Christopher Miall
Nov 4, 2008·Journal of Neurologic Physical Therapy : JNPT·Teresa Jacobson KimberleyPatricia Slivnik
Dec 1, 2018·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Roberta RonchiGiuseppe Vallar

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