Neuromuscular quadriceps dysfunction prior to osteoarthritis of the knee

Becker, Roland; Berth, Alexander; Nehring, Markus; Awiszus, Friedemann

doi:10.1016/j.orthres.2003.11.004

Cited by 108 publications

(106 citation statements)

References 48 publications

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“…Each wavelet was represented by a bell shaped filter curve in frequency space and had a short wave as a counterpart in time space. The wavelets were characterized by their center frequency (Hz), bandwidth (Hz), and time resolution (ms): wavelet 0 (7 Hz, 15 ). An interpolation was used to convert noninteger wavelet numbers (e.g., mean wavelet number) to frequencies.…”

Section: Emg Measurementmentioning

confidence: 99%

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Lower leg muscle atrophy in ankle osteoarthritis

et al. 2006

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The aim of this study was to determine changes in the lower leg muscles associated with ankle osteoarthritis. Fifteen unilateral ankle osteoarthritis patients and fifteen age-gender-matched normal subjects were assessed with clinical [osteoarthritis latency time, pain, alignment, AOFAS ankle score, ankle range of motion (ROM), calf circumference], radiological (ankle osteoarthritis grading), and muscular-physiological parameters [isometric maximal voluntary ankle torque, surface electromyography of the anterior tibial (AT), medial gastrocnemius (MG), soleus (SO), and peroneus longus (PL) muscle]. The osteoarthritis patients had increased pain (6.8 points) and reduced AOFAS score (33.7 points) compared to the control group. Compared to the contralateral healthy leg, the arthritic leg showed reduced mean dorsi-/plantar flexion ROM (16.08), reduced mean calf circumference (2.1 cm), smaller mean dorsiflexion (16.4 Nm) and plantar flexion (15.8 Nm) torques, lower mean electromyography frequency for all muscles (AT À22.6 Hz; MG À27.3 Hz; SO À25.9 Hz; PL À28.5 Hz), and lower mean electromyography intensity in the AT [À28.0 Â 10 3 (mv) 2 ], MG [À13.3 Â 10 3 (mv) 2 ], and PL [À12.8 Â 10 3 (mv) 2 ]. SO mean electromyography intensity was not significantly changed [þ2.0 Â 10 3 (mv) 2 ]. Unilateral ankle osteoarthritis is associated with atrophic changes of the lower leg muscles. This study supports previous observations on muscle dysfunction in knee osteoarthritis. ß

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Section: Emg Measurementmentioning

confidence: 99%

“…6,8,[15][16][17][18][19][20][21] It has been shown that in knee OA the quadriceps strength is usually reduced by 14% to 45% compared to control subjects. 6,8,18,19,21 Sirca et al 22 reported that degenerative hip OA was associated with an atrophy of type II fibers.…”

Section: Introductionmentioning

confidence: 99%

Lower leg muscle atrophy in ankle osteoarthritis

et al. 2006

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“…5 In addition to the effects on the joint structure and function, OA also has a negative effect on the musculoskeletal system. Patients with knee OA have decreased knee extensor strength compared to healthy subjects [6][7][8][9][10] and compared to the healthy contralateral limb. 11,12 Evidence also suggests that the muscle weakness is associated with a decrease in muscle mass.…”

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confidence: 96%

Neuromuscular electrical stimulation (NMES) reduces structural and functional losses of quadriceps muscle and improves health status in patients with knee osteoarthritis

Vaz¹,

Baroni²,

Geremia³

et al. 2012

Journal Orthopaedic Research

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Knee osteoarthritis (OA) is associated with quadriceps atrophy and weakness, so muscle strengthening is an important point in the rehabilitation process. Since pain and joint stiffness make it often difficult to use conventional strength exercises, neuromuscular electrical stimulation (NMES) may be an alternative approach for these patients. This study was aimed at (1) identifying the associations of knee OA with quadriceps muscle architecture and strength, and (2) quantifying the effects of a NMES training program on these parameters. In phase 1, 20 women with knee OA were compared with 10 healthy female, asymptomatic, age-matched control subjects. In phase 2, 12 OA patients performed an 8-week NMES strength training program. OA patients presented smaller vastus lateralis thickness (11.9 mm) and fascicle length (20.5%) than healthy subjects (14.1 mm; 24.5%), and also had a 23% smaller knee extensor torque compared to the control group. NMES training increased vastus lateralis thickness (from 12.6 to 14.2 mm) and fascicle length (from 19.6% to 24.6%). Additionally, NMES training increased the knee extensor torque by 8% and reduced joint pain, stiffness, and functional limitation. In conclusion, OA patients have decreased strength, muscle thickness, and fascicle length in the knee extensor musculature compared to control subjects. NMES training appears to offset the changes in quadriceps structure and function, as well as improve the health status in patients with knee OA. Keywords: osteoarthritis; muscle architecture; muscle strength; WOMAC; electrical stimulation Osteoarthritis (OA) is one of the major degenerative diseases and it affects elderly women more frequently than elderly men.1,2 The prevalence of OA is expected to increase dramatically in the near future due to the increased life expectancy and an increasing rate of obesity of the world population.3 The knee is the most affected joint with 13.6% of women above 60 years showing radiographic evidence of OA and/or clinical symptoms. 2OA causes erosion of articular cartilage, weakening of subchondral bone, meniscal degeneration, inflammation of the synovium, and intra-articular osteophytes. 4 These changes lead to a reduction in the range of motion, and increase in joint stiffness and pain. 5In addition to the effects on the joint structure and function, OA also has a negative effect on the musculoskeletal system. Patients with knee OA have decreased knee extensor strength compared to healthy subjects 6-10 and compared to the healthy contralateral limb.11,12 Evidence also suggests that the muscle weakness is associated with a decrease in muscle mass. 11,12However, although a reduction in muscle thickness 11 and anatomical cross-sectional area 12 have been described in OA patients, we were unable to find evidence on how muscle weakness was related to changes in other muscle architecture parameters associated with strength, such as fascicle length, and pennation angle.Fascicle length is related to the number of sarcomeres aligned in series in the ...

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“…4 Altered biomechanics and neuromuscular control have been postulated to play a significant role in the disproportionate incidence of knee joint injuries and osteoarthritis observed in females. 5,6 Consequently, researchers have recently placed significant effort into elucidating neuromuscular and biomechanical differences in males and females. Although researchers have evaluated gender differences in muscle responses to destabilizing loads applied to the joint and knee kinematics and kinetics during sport specific activities, [7][8][9][10][11] it remains unclear whether there are fundamental differences in the voluntary knee muscle control strategies used by athletic males and females.…”

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confidence: 99%

Quadriceps and hamstrings muscle control in athletic males and females

Krishnan

Huston

Amendola

et al. 2008

Journal Orthopaedic Research

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The aim of this study was to investigate whether athletic males and females have differences in their quadriceps and hamstrings muscle control strategies. Twenty-four people (12 males, 12 females) active in level I activities volunteered to participate. The subjects' muscle control strategies were studied using electromyography and a target matching protocol that assesses one's ability to produce force with control. The degree of control exhibited in the subjects' quadriceps and hamstrings muscle activation strategies was evaluated by calculating specificity indices for each muscle using circular statistics. Females displayed significantly lower specificity than males in their vastus medialis (p < 0.001), rectus femoris (p ¼ 0.044), and lateral hamstrings (p ¼ 0.001) muscle activity patterns, but similar specificity in their vastus lateralis and medial hamstrings activity patterns. Females also used a significantly higher magnitude of vastus lateralis (p < 0.001) and vastus medialis (p < 0.001) muscle activity than males to achieve the same relative force level. These findings indicate athletic males and females have differences in their knee muscle control strategies. ß

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Neuromuscular quadriceps dysfunction prior to osteoarthritis of the knee

Cited by 108 publications

References 48 publications

Lower leg muscle atrophy in ankle osteoarthritis

Lower leg muscle atrophy in ankle osteoarthritis

Neuromuscular electrical stimulation (NMES) reduces structural and functional losses of quadriceps muscle and improves health status in patients with knee osteoarthritis

Quadriceps and hamstrings muscle control in athletic males and females

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