1. Altered vastii recruitment when people with patellofemoral pain syndrome complete a postural task 
Sallie M. Cowan, BAppSci, Paul W. Hodges, PhD, Kim L. Bennell, PhD, Kay M. Crossley, BAppSci 
Archives of Physical Medicine and Rehabilitation 
Volume 83, Issue 7, Pages (July 2002)
DOI: /apmr
Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

2. Fig. 1
Representative raw electromyographic data from a subject in the (A) control and (B) PFPS group in the rock task. Arrows indicate the onset of muscle activity. Note that in the control subject the electromyographic onset of the VMO and vastus lateralis occur at approximately the same time, whereas in the PFPS subject the electromyographic onset of the vastus lateralis occurs before VMO. Abbreviations: EMG, electromyogram; VL, vastus lateralis; TA, tibialis anterior.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr )
Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

3. Fig. 2
Representative raw electromyograms from a subject in the (A) control and (B) PFPS group during the rise task. Arrows indicate the onset of muscle activity. Note in the control subject that the electromyographic onsets of the VMO and vastus lateralis occur almost synchronously, whereas in the PFPS subject the electromyographic onset of the vastus lateralis occurs before VMO. Abbreviation: Sol, soleus.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr )
Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

4. Fig. 3
Mean difference in electromyographic onset of the VMO relative to the vastus lateralis for the PFPS and control subjects in the rock and rise tasks. Boxes indicate the mean electromyographic onset timing difference. SEMs are also shown. Note that in the control subjects the average electromyographic onset of the VMO and vastus lateralis occur almost at the same time in both the rock and rise tasks. In contrast, the electromyographic onset of the VMO occurs after that of the vastus lateralis in both tasks in the PFPS subjects.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr )
Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

5. Fig. 4
Electromyographic onsets of the VMO and vastus lateralis with respect to the onset of the prime mover when all subjects completed the rock and rise tasks. Boxes indicate the mean electromyographic onset. SEMs are also shown. Note the delayed onset of the VMO in the PFPS subjects in the rock task and the earlier activation of the vastus lateralis in the rise task.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr )
Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions

6. Fig. 5
Representative data for a control subject completing the rise task; note the early activation of the tibialis anterior before the onset of the prime mover for the task, the soleus.
Archives of Physical Medicine and Rehabilitation  , DOI: ( /apmr )
Copyright © 2002 American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation Terms and Conditions