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Patellar Tendon Reflex and Vastus Medialis Hoffmann Reflex Are Down Regulated and Correlated in Women With Patellofemoral Pain

Journal Article


Abstract


  • Objectives: The aims of this study were threefold: (1) to compare the amplitude of patellar tendon reflex (T-reflex) between women with patellofemoral pain (PFP) and pain-free controls; (2) to compare the amplitude of vastus medialis Hoffmann reflex (VM H-reflex) between women with PFP and pain-free controls; (3) to investigate the association between the amplitude of patellar T-reflex and VM H-reflex in women with PFP and pain-free controls. Design: Cross-sectional observational study. Setting: Laboratory of biomechanics and motor control. Participants: Thirty women with PFP and 30 pain-free women aged 18 to 35 years (N=60). Main Outcome Measures: Peak-to-peak amplitudes of maximal VM H-reflex (elicited via electrical stimulation on the femoral nerve) and patellar T-reflex (elicited via mechanical percussion on the patellar tendon) were estimated. Results: Women with PFP had significant lower amplitude of patellar T-reflex (mean difference=0.086; 95% confidence interval=0.020 to 0.151; P=.010; moderate effect) and VM H-reflex (mean difference=0.150; 95% confidence interval =0.073 to 0.227; P<.001; large effect) compared to pain-free controls. The VM H-reflex was strongly correlated with patellar T-reflex in both PFP group (r=0.66; P<.001) and control group (r=0.72; P<.001). Conclusions: As the T-reflex is easier to perform than H-reflex assessments in a clinical setting, it represents a feasible option to assess the impaired excitability of the stretch reflex pathway associated with PFP.

Publication Date


  • 2019

Citation


  • Pazzinatto, M. F., de Oliveira Silva, D., Ferreira, A. S., Waiteman, M. C., Pappas, E., Magalh��es, F. H., & Azevedo, F. M. D. (2019). Patellar Tendon Reflex and Vastus Medialis Hoffmann Reflex Are Down Regulated and Correlated in Women With Patellofemoral Pain. Archives of Physical Medicine and Rehabilitation, 100(3), 514-519. doi:10.1016/j.apmr.2018.06.024

Scopus Eid


  • 2-s2.0-85053310390

Start Page


  • 514

End Page


  • 519

Volume


  • 100

Issue


  • 3

Place Of Publication


Abstract


  • Objectives: The aims of this study were threefold: (1) to compare the amplitude of patellar tendon reflex (T-reflex) between women with patellofemoral pain (PFP) and pain-free controls; (2) to compare the amplitude of vastus medialis Hoffmann reflex (VM H-reflex) between women with PFP and pain-free controls; (3) to investigate the association between the amplitude of patellar T-reflex and VM H-reflex in women with PFP and pain-free controls. Design: Cross-sectional observational study. Setting: Laboratory of biomechanics and motor control. Participants: Thirty women with PFP and 30 pain-free women aged 18 to 35 years (N=60). Main Outcome Measures: Peak-to-peak amplitudes of maximal VM H-reflex (elicited via electrical stimulation on the femoral nerve) and patellar T-reflex (elicited via mechanical percussion on the patellar tendon) were estimated. Results: Women with PFP had significant lower amplitude of patellar T-reflex (mean difference=0.086; 95% confidence interval=0.020 to 0.151; P=.010; moderate effect) and VM H-reflex (mean difference=0.150; 95% confidence interval =0.073 to 0.227; P<.001; large effect) compared to pain-free controls. The VM H-reflex was strongly correlated with patellar T-reflex in both PFP group (r=0.66; P<.001) and control group (r=0.72; P<.001). Conclusions: As the T-reflex is easier to perform than H-reflex assessments in a clinical setting, it represents a feasible option to assess the impaired excitability of the stretch reflex pathway associated with PFP.

Publication Date


  • 2019

Citation


  • Pazzinatto, M. F., de Oliveira Silva, D., Ferreira, A. S., Waiteman, M. C., Pappas, E., Magalh��es, F. H., & Azevedo, F. M. D. (2019). Patellar Tendon Reflex and Vastus Medialis Hoffmann Reflex Are Down Regulated and Correlated in Women With Patellofemoral Pain. Archives of Physical Medicine and Rehabilitation, 100(3), 514-519. doi:10.1016/j.apmr.2018.06.024

Scopus Eid


  • 2-s2.0-85053310390

Start Page


  • 514

End Page


  • 519

Volume


  • 100

Issue


  • 3

Place Of Publication