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Table 1 Demographic and needle and surface motor unit potential parameters for OA and control participants

From: Vastus medialis motor unit properties in knee osteoarthritis

 

Control

OA

Demographic Parameters

  

Male/Female

4/4

4/4

Age

61.8 ± 5.9

61.3 ± 3.8

Height (m)

1.69 ± 0.07

1.72 ± 0.09

Weight (kg)

77.9 ± 24.0

99.9 ± 20.3

BMI (kg/m2)

27.0 ± 27.3

33.4 ± 4.6

WOMAC Score

0.75 ± 0.76

42.4 ± 14.8*

Knee Extensor MVC (N•m/kg)

1.87 ± 0.49

1.47 ± 0.43

N-MUP Parameters

  

Peak-to-peak voltage (μV)

548 ± 295

505 ± 318

Duration (ms)

10.5 ± 5.1

12.0 ± 4.9*

AAR

1.7 ± 0.5

1.9 ± 0.5*

Turns

2.9 ± 1.2

3.0 ± 1.1

Phases

2.6 ± 0.7

2.6 ± 0.7

S-MUP Parameters

  

Negative peak amplitude (μV)

41.2 ± 29.2

41.7 ± 29.2

Negative peak duration (ms)

8.9 ± 2.6

9.0 ± 2.4

Negative peak area (μV•ms)

180.4 ± 122.4

173.2 ± 98.7

Firing rate (Hz)

9.1 ± 1.9

8.4 ± 1.8*

  1. Data are presented as means ± standard deviations. BMI: body mass index; WOMAC: Western Ontario and McMaster Osteoarthritis Questionnaire; N-MUP: needle motor unit potential; AAR: area-to-amplitude ratio, S-MUP: surface motor unit action potential.
  2. *Significant difference between Control and OA groups (p < 0.05).
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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