|dc.creator||Yang, J.-l. and Jan, M.-H. and Hung, C.-J. and Yang, P.-L. and Lin, J.-j.||-|
|dc.description.abstract||The purpose of the present study was to determine (1) if joint position sense (JPS) in subjects with shoulder stiffness (SS) differs from that in controls; (2) if, when JPS is reduced in SS, it is related to scapular muscular activities in the mid/end ranges of motion; and (3) if a person's function is associated with his or her level of JPS. Eighteen subjects with unilateral SS and 18 controls were included. Each subject performed abduction by self-selecting an end/mid range position. The electromagnetic motion-capturing system collected kinematic data while surface electromyography collected muscle activities (upper trapezius, lower trapezius, and serratus anterior muscles). Subjects were asked to move the upper limb to the target position (end/mid range) accurately without visual guidance. Reduced JPS was observed in subjects with SS (2.7 degrees in mid range, p < 0.05). The JPS was enhanced by an increased scapula muscular activation level in the end range of motion (R = -0.61 for SS and -0.41 for controls) and by coordination among muscles' activation in the mid-range of motion (R = -0.87 for SS and R = -0.53 for controls). Impaired JPS was also related to self-reported functional status (R = -0.56) in subjects with SS. Shoulder JPS in subjects with chronic SS is impaired in comparison with controls. In the mid-range motion, the coordination of scapula muscular activation is related to shoulder JPS. Impaired JPS is also function-related in subjects with SS. These findings suggest that the coordination among scapula muscles' activation were important to consider in the rehabilitation of patients with chronic SS. ? 2009 Elsevier Ltd. All rights reserved.||-|
|dc.relation.ispartof||Journal of Electromyography and Kinesiology||-|
|dc.source||AH-Scopus to ORCID||-|
|dc.subject.other||abduction; adult; arm movement; article; clinical article; controlled study; electromagnetic flowmeter; electromyography; female; frozen shoulder; human; male; motor coordination; muscle contraction; muscle function; priority journal; proprioception; range of motion; scapula; serratus anterior muscle; shoulder injury; skeletal muscle; trapezius muscle; voluntary movement; Chronic Disease; Contracture; Feedback; Female; Humans; Joint Instability; Male; Middle Aged; Movement; Muscle Contraction; Muscle, Skeletal; Sensation; Shoulder Joint; Task Performance and Analysis||-|
|dc.title||Reduced scapular muscle control and impaired shoulder joint position sense in subjects with chronic shoulder stiffness||-|
|Appears in Collections:||物理治療學系所|
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