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Purpose
The Motricity Index (MI) is an ordinal method of measuring limb strength developed by Demeurisse et al in 1980.
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The Motricity Index (MI) is an ordinal method of measuring limb strength developed by Demeurisse et al in 1980.
6 items on each side (3 for the arm; 3 for the leg)
5 minutes
5 minutes for experienced examiners working with patients who are cognitively intact
Adults
18 - 64
yearsElderly Adult
65 +
yearsInitial review completed by Maggie Bland, PT, DPT, NCS and Nancy Byl, PT, MPH, PhD, FAPTA and the StrokEdge Task Force of the Neurology Section of the APTA 2016.
Recommendations for use of the instrument from the Neurology Section of the American Physical Therapy Association’s Stroke Taskforce (StrokEDGE are listed below). These recommendations were developed by a panel of research and clinical experts using a modified Delphi process.
For detailed information about how recommendations were made, please visit: ANPT Outcome Measures Recommendations (EDGE)
Abbreviations:
HR
Highly Recommend
R
Recommend
LS / UR
Reasonable to use, but limited study in target group / Unable to Recommend
NR
Not Recommended
Recommendations for use based on acuity level of the patient:
Acute
(CVA < 2 months post)
Subacute
(CVA 2 to 6 months)
Chronic
(> 6 months)
StrokEDGE
HR
HR
HR
Recommendations based on level of care in which the assessment is taken:
Acute Care
Inpatient Rehabilita-
tion
Skilled Nursing Facility
Out
patient
Rehabilitation
Home Health
StrokEDGE
HR
HR
HR
HR
HR
Recommendations for entry-level physical therapy education and use in research:
Students should learn to administer this tool? (Y/N)
Students should be exposed to tool? (Y/N)
Appropriate for use in intervention research studies? (Y/N)
Is additional research warranted for this tool (Y/N)
StrokEDGE
Yes
Yes
Yes
No
This test is fast and easy to learn and administer, but as with other measures attempting to grade strength in the stroke population, it is only one piece of the puzzle. The ability to generate force and power in a muscle is necessary for movement, but in the presence of increased tone or without the ability to coordinate and grade the movement, full function is not restored.
Although test procedures are vague on patient position for testing,, the test is usually administered with the patient sitting. Shoulder abduction begins with the arm at the side and elbow flexed to 90 o.
The test has excellent reliability and excellent reported construct, concurrent validity particularly relative to and predictive validity correlating admission levels of limb strength and recovery of upper limb function and walking ability.
(Gor-Garcia-Fogeda et al,2014) In this systematic review of 2b level studies, six measurement scales for gross motor function were included: (Motor Assessment Scale, Fugl-Meyes Assessment,, Sodring Motor Evaluation for Stroke Patients, Stroke Rehabilitation Assessment of Movement, Motricity Index and Rivermead Motor Assessment. All six scales ( including the MI) were found to be useful for clinical research and clinical practice, but the scales for which the most psychometric properties have been established in clinical trials were the Fugl Meyer Assessment (FMA) and the Stroke Rehabilitation Assessment of Movement (STREAM)
(Geroin et al, 2013) performed a systematic review of outcome measures used following motor training using electromechanical and robotic devices in patients post stroke. A total of 45 scales were identified from 27 studies involving 966 subjects. The most commonly used outcome measures were: Functional Ambulation Category (18 studies) , 10- Meter Walking Test (13 studies), Motricity Index (12 studies), 6- Minute Walking Test (11 studies), Rivermead Mobility Index (8 studies) and the Berg Balance Scale (8 studies). All of the outcome measures belonged to the activity domain of the ICF except the MI which was classified as a measurement of body function and structure. No scales belonged to the participation category. For the MI, Inter-rater reliability and Construct validity were excellent.
Chronic Stroke: (Fayazi, Dehkord, Dadgoo, & Salehi, 2012; n = 20; age range = 37 to 76; time post stroke range = 3 months to 4 years; male = 10; female = 10)
Chronic Stroke: calculated using SEM from (Fayazi et al., 2012)
MCID is not reported in the literature.
Upper Extremity Hemiparesis: (Sunderland, Tinson, Bradley, & Hewer, 1989; n = 38; age range = 31 to 82; average age = 67; left arm affected, n = 21; right arm affected = 17; MCA stroke, n = 36; brainstem stroke, n = 2)
Acute/Chronic Stroke: (Demeurisse, Demol, & Robaye, 1980; n = 100; measured at 11 days, 2, 4 and 6 months post stroke; mean age (total) = 69, 59 men, mean age = 67; 41 women, mean age = 71; left side hemiplegia = 36, right side hemiplegia = 64)
*Authors do not report the normative data, but the measure and subsequent norms were developed using this population
Subacute/Chronic Stroke: (Collin & Wade, 1990; n = 36; weeks post stroke = 6 (27 weeks), 12 (25 weeks); 18 (14 weeks); age range (male) = 15 to 77; mean age (male) = 56.1; age range (female) = 45-69; mean age (female) = 59.9; right side hemiplegia = 21)
Mean
Standard Deviation
Observer 1
30
36
Observer 2
31
39
Acute/Subacute Stroke: (Bohannon, 1999; n = 15; age range = 46 to 81; mean age = 66.7; within 15 days of onset; no comorbidities affecting upper extremity)
Motricity Index Subscale
Mean (95% CI)
Median
Range
Pinch-Grasp
15.2 (5.5-24.9)
20.5
0-33.0
Elbow Flexion
19.7 (10.3-29.1)
25.0
0-33.0
Shoulder Abduction
18.7 (10.6-26.8)
22.0
0-33.0
Total Motricity
54.6 (28.2-81.0)
70.5
1-100.0
Acute/Chronic Stroke: (Hsieh et al., 1998; n = 50; mean age = 65; male = 30; female = 20; median, range days post onset = 55 (8-535); subarachnoid hemorrhage = 7; cerebral hemorrhage = 13; cerebral infarction = 21; other = 9; right-sided paresis = 22; left-sided paresis = 23; bilateral paresis = 5)
Subacute/Chronic Stroke: (Jacob-Lloyd, Dunn, Brain, & Lamb, 2005; upper extremity n = 22; age > 60 years, n = 85%(of total study n = 55); assessed average of 76 days post onset and 6 months + 76 days (average) post onset)
Time Post Onset
Median
IQR
Discharge (76 day average)
77
77-84
6 months post discharge
100
77-100
Lower Extremity:
Subacute/Chronic Stroke: (Collin & Wade, 1990)
Median
Standard Deviation
Observer 1
52
20
Observer 2
55
22
Subacute/Chronic Stroke: (Jacob-Lloyd et al., 2005)
Time post onset
Median
IQR
Discharge (76 day average)
76
52-94
6 months post discharge
76
48-100
Subacute Stroke: (Cameron & Bohannon, 1999; n = 15; age range = 29 to 77; mean age = 53.7; male = 11; female = 4; left-sided hemiparesis = 8; right-sided hemiparesis = 7)
Motricity Index Subscale
Mean
Standard deviation
Range
Hip flexion
20.3
6.5
9-33
Knee extension
21.2
7.7
0-33
Ankle dorsiflexion
11.7
10.6
0-33
All
54.3
20.9
10-100
Chronic: (Fayazi et al., 2012)
Week 1
Week 2
Mean score (SD)
58.20 (17.683)
56.60 (19.632)
Chronic Stroke: (Fayazi et al., 2012)
Subacute/Chronic Stroke: (Collin & Wade, 1990)
Chronic Stroke: (Fayazi et al., 2012)
Normative Sample: (Haley et al., 1992; n = 412)
*Scores > .9 may indicate redundancy in scale questions.
Acute Stroke: (Cameron & Bohannon, 2000; n = 15)
Predictive validity
Subacute/Chronic Stroke: (Collin and Wade, 1990)
Upper Extremity Hemiparesis: (Sunderland et al., 1989)
Subacute/Chronic Stroke: (Collin & Wade, 1980)
One Year or More Post Stroke: (Kong et al., 2011; n = 140; mean age = 61.0 (13.3); male, n = 88; UE MI mean = 21.0 (25.9); LE MI mean = 29.8 (27.2); Modified Barthel Index mean = 42.8 (26.3); Dysphasia, n = 37; Neglect, n = 32; Sensory impairment, n = 80)
Factors correlating MI scores to Upper Limb Dexterity
Variable
Upper Limb
Dexterity
Yes No
P Value
Upper Extremity MI score (Rehab)
Lower Extremity
MI score (Rehab)
48.7
(20.7)
11.2
(19.1)
55.0
(17.6)
19.8
(23.7)
<0.001
<0.001
Stroke: (Bland et al., 2012; two samples of patients in an inpatient rehabilitation facility unit (n = 110 and 159; mean age 62 (14) and 63 (15), respectively)
Ischemic or Hemorrhagic Stroke: (Aufman et al., 2013; n = 198; mean age of nondrivers = 64.1 (± 14.0); mean age of nonreturners = 59.9 (±13); mean age of returners = 61.5 (± 13.7))
Acute Stroke: (Cameron & Bohannon, 2000)
Concurrent validity
Stroke: (Arwert et al, 2016; n = 51; average time since stroke = 8 months (3-27 months); female, n = 16)
Subscales of the MHQ
MI correlation
Overall Hand Function
0.80
ADL
0.67
Pain
0.43
Work Performance
0.59
Aesthetics
0.67
Satisfaction
0.72
MHQ Total
0.78
Upper Extremity: (Sunderland et al., 1989)
Stroke: (Bohannon, 1999)
Acute Stroke: (Cameron & Bohannon , 2000), (Bohannon, 1999), (Sunderland et al., 1989)
Subacute/Chronic Stroke: (Collin & Wade, 1990)
Time
RMA/MI-arm
RMA/MI-leg
6 weeks
0.76*
0.81*
12 weeks
0.73*
0.81*
18 weeks
0.74**
0.75**
* p < 0.001; ** p < 0.01
Post Stroke Hemiplegia: (Lu et al., 2015; n = 22; mean age = 54.8 (8.5); male, n = 18; able to walk independently; mean Leg MI score = 70.4 (21.5); Chinese sample)
Within 6 Months Post Stroke: (Meyer et al., 2015; n = 122; males, n = 77; mean post stroke time = 82 days; average age = 67 (58.8-76.1; Belgian sample)
Somatosensation
Association with MI
Exteroceptive
Em-NSA light touch
Em-NSA pressure
Em NSA pinprick
PTT light touch
Proprioceptive
Em-NSA movement sense
TFT position sense
Higher Cortical
Em-NSA sharp/dull
NSA stereognosis
Two point discrimination
0.318
0.337
0.348
-0.564
0.394
-0.354
0.220
0.535
-0.316
Em-NSA = Erasmus MC modification of the revised Nottingham Sensory Assessment; TFT = Thumb Finding Test; Statistically significant adequate correlations
Ischemic or Hemmorhagic Stroke: (Bertrand et al., 2015; n = 34)
Participants were recruited from an acute neurology ward after their first stroke, and were administered the MI Arm, Chedoke Arm and Hand Activity Inventory (CAHAI), and the ABILHAND questionnaire.
Subacute/Chronic Stroke: (Collin & Wade ,1990)
Weeks Post Stroke
RMA Arm vs MI Arm
RMA Leg vs MI Leg
6 (n = 27)
0.76**
0.81**
12 (n = 25)
0.73**
0.81**
18 (n = 14)
0.74*
0.75*
**p < 0.001; *p < 0.01; RMA = Rivermead Motor Assessment; MI = Motricity Index
When the Motricity Index was initially developed, Demeurisse et al. (1980, p. 388) applied a Hotelling’s analysis and determined that, “because of the nearness of these coefficients, the sum of the values of the six items in question is a good measurement of analytical motricity.”
Content validity was not discussed in the literature. The Motricity Index, however, is often used when examining validity, reliability and responsiveness of other rehab measures (Wade, 1988; Benaim et al., 1999; Bertrand et al., 2015)
Upper Extremity:
Lower Extremity:
Upper Extremity:
Lower Extremity:
Arwert HJ, Keizer S, Kromme CH, Vliet Vlieland TP, Meesters JJ. (2016) Validity of the Michigan Hand Outcomes Questionnaire in Patients With Stroke. Archives of physical medicine and rehabilitation. 97(2):238-44. Find it on PubMed.
Aufman, EL, Bland, MD, Barco, PP, Carr, DB, Lang CE. (2013) Predictors of return to driving after stroke. Am J Phys Med Rehabil 92(3): 1-8. Find it on PubMed.
Bertrand AM, Fournier K, Wick Brasey MG, Kaiser ML, Frischknecht R, Diserens K. (2015) Reliability of maximal grip strength measurements and grip strength recovery following a stroke. JHT 28(4):356-62. Find it on PubMed.
Bland MD, Sturmoski A, Whitson M, Connor LT, Fucetola R, Huskey T, et al. (2012) Prediction of discharge walking ability from initial assessment in a stroke inpatient rehabilitation facility population. Archives of physical medicine and rehabilitation. 93(8):1441-7. Find it on PubMed.
Bohannon R (1999) Motricity index scores are valid indicators of paretic upper extremity strength following stroke. J Phys Ther Sci. 11:59-61.
Cameron D, Bohannon R. (2000) Criterion validity of lower extremity Motricity Index scores. Clin Rehabil. 14:208. Find it on PubMed.
Collin C, Wade D. (1990) Assessing motor impairment after stroke: a pilot reliability study. J Neurol Neurosurg, Paych 53:576-579 Find it on PubMed
Demeurisse G, Dermol O, Robaye E (1980) Motor evaluation in vascular hemiplegia. European Neurology. 19(6): 381-389 Find it on PubMed
Fayazi M, Dehkordi SN, Dadgoo M, Salehi M. Test-retest reliability of Motricity Index strength assessments for lower extremity in post stroke hemiparesis. (2012) Medical journal of the Islamic Republic of Iran. 26(1):27-30. Find it on PubMed.
Geroin C, Mazzoleni S, Smania N, Gandolfi M, Bonaiuti D, Gasperini G, et al. (2013) Systematic review of outcome measures of walking training using electromechanical and robotic devices in patients with stroke. Journal of rehabilitation medicine. 45(10):987-96. Find it on PubMed.
Gor-Garcia-Fogeda MD, Molina-Rueda F, Cuesta-Gomez A, Carratala-Tejada M, Alguacil-Diego IM, Miangolarra-Page JC. (2014) Scales to assess gross motor function in stroke patients: a systematic review. Arch of Phys Med & Rehab. 95(6):1174-83. Find it on PubMed.
Kong KH, Chua KS, Lee J. (2011) Recovery of upper limb dexterity in patients more than 1 year after stroke: Frequency, clinical correlates and predictors. NeuroRehabilitation. 28(2):105-11. Find it on PubMed.
Lu X, Hu N, Deng S, Li J, Qi S, Bi S. (2015) The reliability, validity and correlation of two observational gait scales assessed by video tape for Chinese subjects with hemiplegia. Journal of physical therapy science. 27(12):3717-21. Find it on PubMed.
Meyer S, De Bruyn N, Lafosse C, Van Dijk M, Michielsen M, Thijs L, et al. (2015) Somatosensory Impairments in the Upper Limb Poststroke: Distribution and Association With Motor Function and Visuospatial Neglect. Neurorehabilitation and neural repair. 1-12. Find it on PubMed.
Sunderland A, Trinson D, Bradley L, Hewer R (1989) Arm function after stroke: an evaluation of grip strength as a measure of recovery and a prognostic indicator. J of Neurol, Neurosurg &Psych. 52: 1267-1272. Find it on PubMed.
Vos-Vromans et al (2005) Responsiveness of the ten meter walking test and other measures in patients with hemiparesis in the acute phase. Phys Ther Prac. 21:173 (abstract only) Find it on PubMed.
We have reviewed more than 500 instruments for use with a number of diagnoses including stroke, spinal cord injury and traumatic brain injury among several others.