REFERENCES
- Brouwer , B. and Ashby , P. 1990 . Corticospinal projections to upper and lower limb spinal motoneurons in man . Electroencephalography and Clinical Neurophysiology , 76 : 509 – 519 .
- Brouwer , B. and Ashby , P. 1992 . Corticospinal projections to lower limb motoneurons in man . Experimental Brain Research , 89 : 649 – 654 .
- Christou , E. A. 2011 . Aging and variability of voluntary contractions . Exercise and sport sciences reviews , 39 ( 2 ) : 77 – 84 .
- Christou , E. A. and Enoka , R. M. 2010 . Aging and movement errors when lifting and lowering light loads . Age (Dordr) , doi:10.1007/s11357-010-9190-4
- Christou , E. A. and Rodriguez , T. M. 2008 . Time but not force is transferred between ipsilateral upper and lower limbs . Journal of Motor Behavior , 40 : 186 – 189 .
- Christou , E. A. , Zelent , M. and Carlton , L. G. 2003 . Force control is greater in the upper compared with the lower extremity . Journal of Motor Behavior , 35 : 322 – 324 .
- Enoka , R. M. , Christou , E. A. , Hunter , S. K. , Kornatz , K. W. , Semmler , J. G. Taylor , A. M. 2003 . Mechanisms that contribute to differences in motor performance between young and old adults . Journal of Electromyography and Kinesiology , 13 ( 1 ) : 1 – 12 .
- Hairi , N. N. , Cumming , R. G. , Naganathan , V. , Handelsman , D. J. , Le Couteur , D. G. Creasey , H. 2010 . Loss of muscle strength, mass (sarcopenia), and quality (specific force) and its relationship with functional limitation and physical disability: The Concord Health and Ageing in Men Project . Journal of the American Geriatrics Society , 58 : 2055 – 2062 .
- Hamilton , A. F. , Jones , K. E. and Wolpert , D. M. 2004 . The scaling of motor noise with muscle strength and motor unit number in humans . Experimental Brain Research , 157 : 417 – 430 .
- Kwon , M. , Baweja , H. S. , Glover , S. Q. and Christou , E. A. 2010 . Motor output variability and error during positional tasks with the index finger and foot , Washington, DC : Society for Neuroscience .
- Mochizuki , G. , Semmler , J. G. , Ivanova , T. D. and Garland , S. J. 2006 . Low-frequency common modulation of soleus motor unit discharge is enhanced during postural control in humans . Experimental Brain Research , 175 : 584 – 595 .
- Oldfield , R. C. 1971 . The assessment and analysis of handedness: The Edinburgh inventory . Neuropsychologia , 9 ( 1 ) : 97 – 113 .
- Prodoehl , J. and Vaillancourt , D. E. 2010 . Effects of visual gain on force control at the elbow and ankle . Experimental Brain Research , 200 ( 1 ) : 67 – 79 .
- Tracy , B. L. , Dinenno , D. V. , Jorgensen , B. and Welsh , S. J. 2007 . Aging, visuomotor correction, and force fluctuations in large muscles . Medicine & Science in Sports & Exercise , 39 : 469 – 479 .
- Tracy , B. L. , Mehoudar , P. D. and Ortega , J. D. 2007 . The amplitude of force variability is correlated in the knee extensor and elbow flexor muscles . Experimental Brain Research , 176 : 448 – 464 .
- Van Schaik , C. S. , Hicks , A. L. and McCartney , N. 1994 . An evaluation of the length-tension relationship in elderly human ankle dorsiflexors . Journal of Gerontology , 49 : B121 – B127 .