BACKGROUND AND AIMS Although the role of afferent input from cervical muscles on the control of posture and locomotion is recognised, it is surprising that there is an absence of data reporting whether joint position sense at the cervical level is impaired in older healthy adults. The present experiment was designed to address this issue. METHODS Eighteen young (mean age=23 yrs) and 18 older ...

This chapter focuses on the relationship between motor control and position sense (PS) defined as the ability of humans to recognize the position of body segments under different conditions. Studies showed that afferent signals from proprioceptive and cutaneous and, to a lesser degree, articular receptors satisfactorily reflect passive changes in the position of body segments (Matthews 1972; Ed...

Xenopus blastula cells show a morphogen-like response to activin by expressing different genes according to the concentration of activin to which they are exposed. To understand how cells recognize their position in a concentration gradient, it is essential to know whether each cell responds individually to activin concentration. An alternative idea, proposed by previous work, is that cells nee...

The present study was aimed to test a hypothesis that individuals with functional ankle instability (FAI) underestimate the joint angle at greater plantarflexion and inversion. Seventeen males with unilateral FAI and 17 controls (males without FAI) consented for participation in this IRB-approved, case-control study. Using a passive reproduction test, we assessed ankle joint position sense (JPS...

OBJECTIVE To assess the effect of starting position, target position, and various types of limb displacement on repositioning tests commonly used for clinical evaluation of rehabilitation. SETTING Controlled laboratory environment. PARTICIPANTS Sixteen healthy volunteer subjects. MAIN OUTCOME MEASURE Absolute error, ie, the absolute difference between target and replicate positions. DES...

[Purpose] This study examined whether the interval at the target angle during knee joint position sense (JPS) affected reposition accuracy, and evaluated the consequence of this factor on test-retest reliability. [Subjects and Methods] Twenty healthy subjects participated in this study. Reposition ability was measured after the knee was placed at a target angle (ranging from 40° to 60°) for int...