SENSORIMOTOR INTEGRATION IN SPATIAL ORIENTATION
空间定向中的感觉运动整合
基本信息
- 批准号:6323238
- 负责人:
- 金额:$ 22.77万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2000
- 资助国家:美国
- 起止时间:2000-07-01 至 2003-06-30
- 项目状态:已结题
- 来源:
- 关键词:aging auditory feedback auditory pathways balance behavioral /social science research tag clinical research cues eye movements gait head movements human old age (65+) human subject limb movement neural information processing neural plasticity performance posture proprioception /kinesthesia psychophysiology sensorimotor system space perception vestibular pathway visual feedback visual fixation visual perception visual stimulus
项目摘要
An essential goal of the nervous system is to maintain orientation and
equilibrium relative to the outside world. Normal performance requires
that we accurately localize ourselves within our surrounding, distinguish
self-movement from that of environment elements, and control movement
through a complex world. These tasks are accomplished by neural systems
that coordinate and integrate multiple motor behaviors with the aid of
feedback from multiple sensory modalities. Vision and audition (the
exteroceptive position of the body and its parts, and vestibular inputs
yield head motion and orientation information. These sensory inputs are
then processed by the brain, which generates the motor behaviors required
to perform natural activities. Examples include coordinated eye and head
movements that acquire and hold fixation on targets of interest, guided
hand movements that allow us to accurately grasp and manipulate objects,
and maintenance of postural and gait stability required for ambulation.
How these crucial and ubiquitous functions work and maintain coordination,
and how they degenerate with natural aging, constitute the subject of the
proposed research. This endeavor is motivated by two public health
concerns: aging is accompanied by a progressive increase in the clinical
prevalence of dysequilibrium, and in the risk and consequences of falls.
Both phenomena constitute failures of spatial orientation and equilibrium
control.
We will study physiological and psychophysical parameters that underlie
how the brain utilizes vestibular, visual, proprioceptive, and auditory
inputs to control eye-head-hand coordination and postural stability. How
these functions deteriorate with aging will be determined. Further, we
will quantify adaptive capabilities that maintain accurate calibration
between sensory modalities and between exteroceptive input and motor
output (e.g. accurate ocular fixation or grasping), and will elucidate
potential age-dependent limitations in these adaptive capabilities. State
of the art techniques will be employed to isolate and combine specific
sensory cues relevant to spatial localization and to the motor acquisition
of external targets, as well as to the control of postural stability. We
hypothesize that specific deficits in sensory interactions, sensorimotor
integration, and adaptive plasticity occur with aging. Further, a
thorough understanding of these functions is required in order to develop
specific and effective interventions that might correct, or rehabilitate,
potential age-dependent or disease-induced deficits.
神经系统的一个基本目标是保持定向和
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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GARY D PAIGE其他文献
GARY D PAIGE的其他文献
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{{ truncateString('GARY D PAIGE', 18)}}的其他基金
Multisensory Interactions Subserving Orienting Behavior
多感官交互促进定向行为
- 批准号:
6506163 - 财政年份:2002
- 资助金额:
$ 22.77万 - 项目类别:
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