title: Effects of joint position on the distraction distance during grade III glenohumeral joint distraction in healthy individuals.
abstract: [Purpose] The study investigated the effects of joint position on the distraction distance during Grade III glenohumeral joint distraction in healthy individuals. [Subjects and Methods] Twenty adults in their forties without shoulder disease were randomly divided into neutral position group (NPG; n = 7), resting position group (RPG; n = 7), and end range position group (ERPG; n = 6). After Kaltenborn Grade III distraction for 40s, the distance between glenoid fossa and humeral head was measured by ultrasound. [Results] The average distances between the humeral head and glenoid fossa before distraction were 2.86 ± 0.81, 3.21 ± 0.47, and 3.55 ± 0.59 mm for the NP, RP, and ERP groups. The distances after applying distraction were 3.12 ± 0.51, 3.86 ± 0.55, and 4.35 ± 0.32 mm. Between-group comparison after applying distraction revealed no significant differences between the NP and RP groups, while there was a statistically significant difference between the NP and RP groups, as well as between the NP and ERP groups. [Conclusion] Joint space was largest in ERP individuals when performing manual distraction.
authors.affiliation: Department of Physical Therapy, College of Medical Health, International University of Korea, Republic of Korea.
authors.forename: Sam-Sik
authors.initials: SS
authors.lastname: Park
authors.affiliation: Department of Physical Therapy, College of Medical Health, International University of Korea, Republic of Korea.
authors.forename: Bo-Kyung
authors.initials: BK
authors.lastname: Kim
authors.affiliation: Department of Physical Therapy, College of Medical Health, Howon University, Republic of Korea.
authors.forename: Ok-Kon
authors.initials: OK
authors.lastname: Moon
authors.affiliation: Department of Physical Therapy, College of Medical Health, International University of Korea, Republic of Korea.
authors.forename: Wan-Suk
authors.initials: WS
authors.lastname: Choi
keywords: Glenohumeral joint; Joint position; Manual distraction