{"id":3413,"date":"1994-10-01T21:32:58","date_gmt":"1994-10-02T04:32:58","guid":{"rendered":"https:\/\/www.activator.com\/?p=3413"},"modified":"2024-01-16T11:48:09","modified_gmt":"2024-01-16T18:48:09","slug":"optoelectric-measurement-of-changes-in-leg-length-inequality-resulting-from-isolation-tests","status":"publish","type":"post","link":"https:\/\/activator.com\/optoelectric-measurement-of-changes-in-leg-length-inequality-resulting-from-isolation-tests\/","title":{"rendered":"Optoelectric Measurement of Changes in Leg Length Inequality Resulting from Isolation Tests"},"content":{"rendered":"\t\t
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\"Fuhr Abstract<\/h3>\n
\n

OBJECTIVE:<\/h4>\n

a) Establish a precise, standardized method to assess prone leg alignment changes (functional “leg length inequality”), which have, until now, been reported clinically to occur as a result putative chiropractic subluxation isolation tests [neck flexion (C5) and extension (C1)]; and b) describe differences in leg alignment changes in a group of healthy subjects and patients with chronic spinal complaints.<\/p>\n

DESIGN:<\/h4>\n

Two group, two isolation tests, descriptive, repeated measure analysis of variance.<\/p>\n

SETTING:<\/h4>\n

Exercise and Sport Research Institute, Arizona State University.<\/p>\n

PARTICIPANTS:<\/h4>\n

Eight healthy controls, eight patients with a history of chronic spinal complaints and observable leg alignment reactivity.<\/p>\n

INTERVENTIONS:<\/h4>\n

Active cervical flexion\/extension maneuvers.<\/p>\n

OUTCOME MEASURES:<\/h4>\n

Optoelectric markers affixed to heels and occiput, as subjects lay prone. Marker locations sampled at 100 Hz for 10 sec during: a) three no movement trials, b) three cervical extension and c) three flexion trials. Data transformed to local reference frame approximately each subject’s longitudinal axis prior to analysis.<\/p>\n

RESULTS:<\/h4>\n

Heel position movement occurred during trials and were highly individualistic. Patients exhibited more asymmetrical movements than the controls during the head-up trials. No differences existed between controls and patients for range of heel displacement or net displacement.<\/p>\n

CONCLUSIONS:<\/h4>\n

The results of this study allow the following to be concluded: 1) small leg displacements (< 1 mm) were recorded by the optoelectric measurement system; 2) heel position changes during isolation tests were identifiable; 3) as a result of head-up maneuvers, patients exhibited more asymmetrical heel movement than controls (t = 8.743, p < .01); 4) The heel range of motion was not different between the groups; and 5) The net change in heel position was not different between the groups. Patients exhibited more asymmetrical heel motion during head-up isolation tests, suggesting that some phenomena may separate these two groups, warranting future study.<\/p>\n

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J Manipulative Physiol Ther.<\/a> 1994 Oct;17(8):530-8. [PMID:7836876<\/a>]<\/p>\n

Author information: De Witt JK, Osterbauer PJ, Stelmach GE, Fuhr AW. Exercise and Sport Research Institute, Arizona State University, Tempe 85287-0404.<\/p>\n<\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t