Much is known about the physiological impairments that can cause muscle fatigue. It is
known that fatigue can be caused by many different mechanisms, ranging from the …

Enoka, Roger M. Eccentric contractions require unique activation strategies by the nervous
system. J. Appl. Physiol. 81 (6): 2339–2346, 1996.—Eccentric contractions occur when …

ABSTRACT A number of studies over the last few decades have established that the control
strategy employed by the nervous system during lengthening (eccentric) differs from those …

Movement is accomplished by the controlled activation of motor unit populations. Our
understanding of motor unit physiology has been derived from experimental work on the …

This paper examines the physiological mechanisms responsible for differences in the
amplitude of force fluctuations between young and old adults. Because muscle force is a …

Soon after Edward Liddell [1895–1981] and Charles Sherrington [1857–1952] introduced
the concept of a motor unit in 1925 and the necessary technology was developed, the …

The purpose of this study was to compare the steadiness and discharge rate of motor units
during submaximal contractions performed by young and old adults. Subjects performed …

A hypothesis about sensorimotor integration (the λ model) is described and applied to
movement control and kinesthesia. The central idea is that the nervous system organizes …

Human arm viscoelasticity is important in stabilizing posture, movement, and in interacting
with objects. Viscoelastic spatial characteristics are usually indexed by the size, shape, and …

Multijoint muscle regulation mechanisms examined by measured human arm stiffness and
EMG signals. Stiffness properties of the musculo-skeletal system can be controlled by …