A review on measuring cervical range of motion using an inertial measurement unit

Juhyuk Yim; Hyunho Kim; Young-Jae Park; Young-Bae Park; Yim, Juhyuk; Kim, Hyunho; Park, Young-Jae; Park, Young-Bae

doi:10.13048/jkm.17006

JKM > Volume 38(1); 2017 > Article

Yim, Kim, Park, and Park: A review on measuring cervical range of motion using an inertial measurement unit

Original Article

The Journal of Korean Medicine 2017; 38(1): 56-71.

Published online: March 31, 2017

DOI: https://doi.org/10.13048/jkm.17006

A review on measuring cervical range of motion using an inertial measurement unit

Juhyuk Yim, Hyunho Kim

, Young-Jae Park, Young-Bae Park

Department of Human Informatics of Korean Medicine, Graduate School, Kyung Hee University

Correspondence to：박영배(Young-Bae Park) 경희대학교 한의과대학 진단·생기능의학 교실 Tel：+82-2-958-9242, Fax：+82-2-958-9104, E-mail: bmppark@khu.ac.kr

Received September 2, 2016 Revised March 16, 2017 Accepted March 24, 2017

Abstract

Objectives

The purpose of this study was to review the article using an IMU(Inertial Measurement Unit) for measuring the cervical range of motion and to evaluate the feasibility of using an IMU for measuring the cervical range of motion.

Method

Scopus was used to search for the articles relating to the inclusion criteria. Which is measuring the cervical range of motion using an IMU. A total of 15 articles were selected through discussion. Degree and the reliability of the cervical range of motion and the validity of the data within the articles were extracted.

Results

The measurement of the cervical range of motion using an IMU were 92.25º to 138.2º, 122.4º to 154.9º, 73.75º to 93.1º on the sagittal plane, transverse plane, and coronal plane respectively. 38 of the 43 values showed good reliability. They were larger than 0.75. 5 of the 43 values showed reliability less than 0.75. They were measured by smart phone. 16 of the 21 values showed good validity. The remaining 5 were measured by smart phone. The lower reliability and validity of smart phone were related to the protocol. The IMU can measure the coupling motion and may be used in various situations.

Conclusion

The IMU may become a gold standard for measuring the cervical range of motion. The IMU measured not only the cervical range of motion but also the coupling motion. Furthermore, IMU may be used in various situations. Therefore, IMU must be considered a valuable measurement device.

Keywords: MU, inertial sensor, inertial measurement unit, motion analysis, ROM, neck

Fig. 1

A Review of Measurement on Cervical ROM using an IMU

Fig. 2

(a) wireless IMU from Kim et al4) (b) Wired IMU based CUELA system From Schiefer et al21).

Fig. 3

the Android phone based equipment set up from Quek et al14).

Fig. 4

Position of the iPhone for the measurement of right lateral flexion from Tousignant et al13).

Fig. 5

(a) A participant wearing the Oculus Rift performing the task. (b) A yellow field goal post at the center viewpoint of the participant from Xu et al22).

Table 1

Measurement on Cervical ROM using an IMU.

Study	N	Sagittal Plane			Transverse Plane			Coronal Plane
Study	N	Total	Extension	Flexion	Total	Left	Right	Total	Left	Right
Pancani et al12	12	106*	54	52	145			80
Schiefer et al21	20	117*	54.33	62.67	141*	70	71	76.33*	39.33	37
Xu et al22	10	69.8			99.5			16.2
Alqhtani et al15	18	128.1*	66.4	61.7	154.9*	80.5	74.4	83.6*	42.1	41.5
Quek et al14	21	131.3*	79.3	52.0	122.4*	65.3	57.1	93.8*	48.8	45.0
Kim et al4	18	116.70	57.23	58.48	143.29	69.67	73.62	89.42	44.15	45.28
Peter et al1	12	92.25			125.75			73.75
Jan et al2	10			63.2		75.0			40.1
Miyaoka et al23	14	112.9*	61.2	51.7				86.6*	43.9	42.7
Duc et al28	10	122			144			88
Tousignant et al13	28	138.2*	82.2	56.0	147.8*	75.4	72.4	93.1*	47.5	45.6

Unit: degree; N: number of subjects.

* These values were calculated by adding two separate values.

Table 2

Reliability of Measurement on Cervical ROM using an IMU.

Study	N	Sagittal Plane			Transverse Plane			Coronal Plane
Study	N	Total	Extension	Flexion	Total	Left	Right	Total	Left	Right
Pancani et al12)	12		0.88	0.92	0.65			0.91
Schiefer et al21)	20		0.89	0.83		0.79	0.83		0.93	0.95
Alqhtani et al15)	18		0.98	0.98		0.99	0.97		0.98	0.98
Quek et al14)	16		0.82	0.86		0.05	0.33		0.85	0.90
Kim et al4)	18	0.98	0.97	0.98	0.99	0.99	0.99	0.97	0.97	0.98
Peter et al1)	12	0.85			0.95			0.86
Duc et al28)	10	0.87			0.98			1.00
Tousignant et al13)	28		0.84	0.78		0.66	0.74		0.78	0.77

Intraclass Correlation Coefficient(ICC). N: number of subjects.

Table 3

Validity of Measurement on Cervical ROM using an IMU.

Study	Gold standard	Validity	N	Sagittal Plane			Transverse Plane			Coronal Plane
Study	Gold standard	Validity	N	Total	Extension	Flexion	Total	Left	Right	Total	Left	Right
Pancani et al12)	The camera’s system	ICC	12	0.98			1.00			0.96
Pryce et al20)	video	Pearson r	13		0.78	0.92	0.95
Quek et al14)	3DMA	ICC	21		0.92	0.98		0.53	0.53		0.95	0.96
Tousignant et al13)	CROM	ICC	28		0.58	0.76		0.43	0.55		0.70	0.85

N: number of subjects. 3DMA: three dimensional motion analysis (Eyeglasses-like instrument has three inclinometers placed at three different positions), CROM: Cervical Range of Motion Device.

Table 4

Devices only for a measurement about movement.

Study	Device	Fix	Size	Communication
Pancani et al12)	OPAL, APDM, Inc., Portland, Oregon, USA	Straps Dermatological patches	N/A	N/A
Pryce et al20)	Microstrain mXRS, Lord Sensing Systems; Williston, Vermont USA	N/A	47g, 58mm × 43mm × 22mm	Wireless
Schiefer et al21)	CUELA SYSTEM (CUELA, IFA, Sankt Augustin, Germany)	Velcro straps	N/A. Only in picture.	Wired
Alqhtani et al15)	3A Sensor String; ThetaMetrix, Waterlooville, UK	double-sided tape	N/A	Wired
Cuesta-Vargas et al25)	Inertiacube3, InterSense Inc., MA		26.2mm×39.2mm×14.8mm	N/A
Kim et al4)	Model EBIMU24G, E2BOX, Seoul, Republic Korea	Velcro straps	7.85g, 32mm × 21mm × 6.5mm	Wireless
Peter et al1)	model 3DM-GX3-25; Microstrain, VT, USA	double-sided toupee tape	18g 44mm × 25mm × 11mm	Wired
Jan et al2)	IC3. Intersense, Bedford, MA, USA		N/A	Wireless
Miyaoka et al23)	ADXL-250, Analog Devices Inc., Norwood, MA, USA	the glasses and suspenders with the two sensor elements	N/A	N/A
Duc et al28)	The weaable system (Physilog®, BioAGM, CH)	dermatological patches	N/A	wireless
Boissy et al26)	MotionPod, Movea Inc, Grenoble, France		33mm × 21mm × 15mm	Wireless

Table 5

Mean (SD. Standard deviation) values for the ROM reached performing extension, flexion, axial rotation and lateral flexion with orthoses.

Max ROM (deg)	Trials without orthoses	HR	SSS A support	SSS 6 supports	VA
Extension	54 (13)	50 (12)	43 (7)	35 (10) **	35 (7) **
Flexion	52 (9)	28 (13) **	36 (13) *	36 (12) *	27 (10) **
Axial rotation	145 (12)	116 (21)	101 (30) **	96 (33) **	77 (30) **
Lateral flexion	80 (12)	70 (13)	67 (11)	60 (18) *	61 (15) *

HR: Headmaster. SSS-A support: SSS with the A support. SSS-6 supports: SSSwith six supports. VA: Vista. (*) Level of significance for the difference with “trials without orthosis” is P < 0.05. (**) Level of significance for the difference with “trials without orthosis” is P < 0.01.

Table 6

Angular displacement of the thrust (deg), Mean ± SD.

	Rotation	Side bending
Pre - training	9.0 ± 8.0	7.9 ± 3.6
Post - training	13.1 ± 8.3	6.6 ± 2.1

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