由实验室李小俚老师邀请了法国国家特级研究员PP Vidal来实验室做报告，欢迎感兴趣的老师来听。

报告题目：Control of gaze and posture in human from bench to  bedside

报告时间：2011年7月7日（周四）上午10点

报告地点：小楼三楼小会议室

报告摘要：

Control of gaze and posture in Human: from bench to  bedside

Prof PP Vidal Md PhD

Although simple in appearance, the control of gaze and posture  is a highly tuned motor behaviour that requires coordinated control in the  spatial and temporal domains of head, neck, trunk, and limbs.  Therefore,maintaining balance involves complex sensorimotor transformations that  must integrate on line several sensory inputs and coordinate multiple motor  outputs to muscles throughout the body.Three types sensory information are  available:visual information about the orientation of objects in space  determines anallocentric frame of reference.Somatosensory information provided  by muscular, joint, and cutaneous receptors encode information about relative  head, trunk and limb position in space and determine anegocentric frame of  reference. Finally, vestibular information encoding head linear and angular  accelerations, determine and invariantgeocentric frame of reference related to  thedirection of gravity. Also,functional brain imaging and clinical studies have  shown that multiple cerebral sensorimotor cortices and the cerebellum are highly  activated during human gaze ad postural control, suggesting that humans depend  on the cerebrum and cerebellum for the control of gaze and posture. This can be  explained by the fact thatcontinuous re-weighting of sensory information from  the visual, vestibular, and somatosensory systems is required for a flexible,  context dependent control of upright stance.In that way,reflexive responses can  be maintained with different “calibrations” for different situations (contexts).  That is, context cues invoke on demand and immediately the proper adapted  state.  

The talk will present three types of study in control subjects,  high-level athletes and patients aimed at investigating how sensory inputs and  cognitive control interact to shape gaze and postural control.

     此致

敬礼！

                           杨静

                     2011.07.05