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OBJECTIVE: To determine if substitution of shoulder internal rotation for external rotation during the upper limb neurodynamic test (ULNT3) evokes comparable ulnar nerve sensory responses in asymptomatic individuals. METHODS: Range of motion, quality, quantity, and distribution of sensory responses in 50 asymptomatic individuals during the traditional ULNT3 were compared to identical measures during an experimental maneuver using shoulder internal rotation. Quality and quantity of sensory responses were recorded using a 10-cm visual analog scale. RESULTS: Means of sensory responses for traditional and experimental maneuvers, respectively, were as follows: stretching, 3.84 ± 8.85 and 5.38 ± 2.85 cm; burning, 1.82 ± 2.82 and 2.50 ± 3.10 cm; tingling, 2.13 ± 3.12 and 2.18 ± 2.97 cm; and numbness, 1.04 ± 2.17 and 1.01 ± 2.03 cm. A moderate to strong correlation (ICC = 0.51-0.86) was shown to exist between maneuvers; this relationship was significant (p = .001). DISCUSSION: Results of this study provide evidence that there was no appreciable difference in sensory responses with regard to burning and tingling when substituting shoulder internal rotation for external rotation during the ULNT3. The results also suggest that there were only marginal differences in the sensory responses of stretching and numbness during the same substitution. CONCLUSION: Patients who have limited glenohumeral external rotation due to pain, instability, and/or articular limitation may benefit from this substitution when presenting with signs of ulnar nerve pathodynamics. Further research will be needed to validate this maneuver in a symptomatic population. LEVEL OF EVIDENCE: Level 2b.
RESUMO
DESIGN: Laboratory study, repeated-measures design. OBJECTIVE: To determine if the substitution of shoulder internal rotation for external rotation during the upper limb neurodynamic test (ULNT3) evokes a comparable ulnar nerve excursion and strain in embalmed cadavers. Shoulder external rotation is a primary movement component of the ULNT3. It has been suggested that shoulder internal rotation may provide a similar load to the nervous system. There are no data to either support or negate this claim. METHODS: Excursion and strain were measured in the ulnar nerve of six embalmed cadavers during the traditional ULNT3 and an experimental maneuver using shoulder internal rotation. RESULTS: The total means±SD of excursion for the traditional and experimental maneuvers were 2·11±0·89 and 2·09±0·92 mm, respectively. The total means±SD of strain for the traditional and experimental maneuvers were 5·274±2·223 and 5·241±2·308%, respectively. A very strong correlation (râ=â0·98) was shown to exist between maneuvers and this relationship was determined to be significant (Pâ=â0·001). DISCUSSION: The results of this study provide evidence that there is no appreciable difference in excursion or strain when substituting shoulder internal rotation for external rotation during the ULNT3. Patients who exhibit limitation of shoulder external rotation mobility may benefit from this substitution when presenting with signs of ulnar nerve pathodynamics. Further research involving patients will be needed to assess the validity of the experimental maneuver for clinical application.
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Background: The Cervical Range of Motion (CROM) device is a valid and reliable clinical tool used to measure full cervical rotation, however, its reliability for measuring upper cervical rotation is unknown.Objectives: Assess between-week test-retest reliability of the CROM device in measuring upper cervical rotationMethod: Thirty students participated in this test-retest reliability study. The CROM device was used to measure left and right cervical rotation in both a seated neutral and fully flexed head-neck position. Interclass correlation coefficient (ICC) was calculated for all motions. Measurement error was determined using standard error of measurement (SEM) and minimal detectable change (MDC).Results: The CROM device demonstrated moderate to good reliability (ICCs 0.65-0.9) of full and upper cervical rotation. The SEMs and MDCs of this study are small and suggest that the chance of repeated measurement error was relatively minimal for the between-week trials.Conclusions: The CROM device is a reliable outcome tool for measuring upper cervical rotation. The clinical implications of these findings suggest that therapists can utilize the CROM device to more completely examine all planes of upper and full cervical mobility. It may also assist in identifying upper cervical ROM limitations associated with underlying cervical pathology or motion dysfunction.