Fraser John J, Mangum L Colby, Hertel Jay
Department of Kinesiology, University of Virginia, 210 Emmet Street South, Charlottesville, VA 22904-4407, USA.
Department of Kinesiology, University of Virginia, 210 Emmet Street South, Charlottesville, VA 22904-4407, USA.
Phys Ther Sport. 2018 Mar;30:39-47. doi: 10.1016/j.ptsp.2017.11.032. Epub 2017 Dec 2.
To establish test-retest reliability of Intrinsic Foot Muscle (IFM) motor function measured using ultrasound imaging (USI).
Laboratory.
Reliability Study.
24 healthy young adults without history of ankle-foot injury.
Ultrasound measures of Abductor hallucis (AbdH), flexor digitorum brevis (FDB), quadratus plantae (QP) and flexor hallucis brevis (FHB) cross-sectional area (CSA) and thickness were assessed on 2 occasions, 3-10 days apart. The IFM were measured at rest, during active and resisted contraction, and during IFM exercises using USI and reported as activation ratios. Reliability was assessed with intraclass correlation coefficients (ICC) and interpreted as being excellent >0.75, 0.40-0.75 as fair to good, and <0.40 as poor.
Reliability of AbdH, FDB, QP, and FHB CSA and thickness resting measures were excellent (0.76-0.98). Active and resisted measures and IFM exercises had good to excellent reliability (0.66-0.99). Standard error of measurement (SEM) of resting CSA thickness measures ranged from 0.09 to 0.14 cm and 0.05-0.09 cm. Minimal detectable change (MDC) for CSA resting measures ranged from 0.25 to 0.40 cm and 0.14-0.24 cm for thickness measures. IFM activation SEM during exercises ranged from 0.01 to 0.11, with MDCs ranging from 0.03 to 0.31.
There is potential utility for USI assessment of IFM neuromotor function in research and clinical practice.
建立使用超声成像（USI）测量的足部固有肌（IFM）运动功能的重测信度。
实验室。
信度研究。
24名无踝足损伤史的健康年轻成年人。
在相隔3 - 10天的两个时间点，评估拇展肌（AbdH）、趾短屈肌（FDB）、跖方肌（QP）和拇短屈肌（FHB）的横截面积（CSA）和厚度的超声测量值。使用USI在静息状态、主动收缩和抗阻收缩期间以及IFM锻炼期间测量IFM，并报告为激活率。用组内相关系数（ICC）评估信度，ICC>0.75为优秀，0.40 - 0.75为中等至良好，<0.40为差。
AbdH、FDB、QP和FHB的CSA及厚度静息测量值的信度优秀（0.76 - 0.98）。主动和抗阻测量以及IFM锻炼的信度为良好至优秀（0.66 - 0.99）。静息CSA厚度测量的测量标准误（SEM）范围为0.09至0.14厘米和0.05 - 0.09厘米。CSA静息测量的最小可检测变化（MDC）范围为0.25至0.40厘米，厚度测量为0.14 - 0.24厘米。锻炼期间IFM激活的SEM范围为0.01至0.11，MDC范围为0.03至0.31。
USI评估IFM神经运动功能在研究和临床实践中具有潜在用途。
