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Motor Output Variability in Older Adults

Motor Output Variability in Older Adults

  • 8/1/2013 9:14:00 AM
  • View Count 2532
Deanna Kennedy, M.S.Often athletic performance seeks to improve accuracy and consistency. For example, while playing golf, we want to consistently hit the ball into the hole. However, many factors affect our ability to produce smooth and accurate movements. One such factor is motor output variability (MOV), defined as the unintentional variations in the output of voluntary contractions. It is a natural and inherent phenomenon that can be observed in every movement or contraction made or repeated...
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Improving Goal-Directed Limb Movement: Don't Overthink This!

Improving Goal-Directed Limb Movement: Don't Overthink This!

  • 7/18/2013 5:27:00 AM
  • View Count 2941
Jason Boyle, Ph.DOur nervous system is highly adaptable in perceiving, analyzing and executing movements in relation to an ever-changing perceptual environment. We use vision, knowledge of limb location, and anticipation of force production while simultaneously recognizing variability in our judgment to execute movements through the world around us. Whether it is simple (reaching for a door knob) or complex (threading a needle), goal directed movement has been repeatedly shown to follow a speed/...
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Talk To The Hand

Talk To The Hand

  • 4/2/2013 11:35:00 AM
  • View Count 2334
Deanna Kennedy, M.S. The ability to coordinate movements between the limbs is important for many activities of daily living and sport specific skills. For example, tying your shoes, slicing bread, driving your car, and serving a tennis ball are tasks that involve some type of coordination between the limbs. However, the role of each limb may vary with different task requirements. Some tasks, such as clapping your hands, require the limbs to produce mirror movements in both time and space. O...
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Control of wrist and arm movements of varying difficulties

Control of wrist and arm movements of varying difficulties

  • 11/11/2011 10:43:00 AM
  • View Count 3451
 Jason Boyle, Ph.DOur muscles are controlled by “motor units”, which each consist of a neuron, and the muscle fiber(s) it activates or “innervates”. The muscle that responds is termed an “effector”. Brain mapping studies have shown that a disproportionate area of the motor cortex governs certain effectors of the body. For example, your fingers, lips, and tongue are highly innervated organs that can execute complex movement patterns, but your toes are not ...
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