Effect of Action Observation and Motor Imagery on Arthrogenic Muscle Inhibition of the Quadriceps in Patients With End-stage Knee Gonarthrosis.
Study Details
Study Description
Brief Summary
The study aims at evaluating the effects of one session of Action Observation Training (AOT) and Motor Imagery (MI) on arthrogenic muscle inhibition (AMI) of the quadriceps (QF) in subjects with end-stage gonarthrosis.
30 patients with end-stage knee osteoarthritis were enrolled. Patients were randomized in two groups (experimental group and control group).
Experimental group performed one 6-minutes AOT and MI session with motor content of concentric and isometric QF contractions, whereas control group underwent a 6-minute sham AOT and MI session. Every patient was evaluated to assess the percentage of AMI on the QF before (T0) and after (T1) the treatment following the gold standard Twitch Interpolated Technique.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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N/A |
Detailed Description
The study aims at evaluating the effects of one session of Action Observation Training (AOT) and Motor Imagery (MI) on arthrogenic muscle inhibition (AMI) of the quadriceps (QF) in subjects with end-stage gonarthrosis.
30 patients with end-stage knee osteoarthritis were enrolled. Patients were randomized in two groups (experimental group and control group).
Experimental group performed one AOT and MI session with motor content of concentric and isometric QF contractions, whereas control group underwent a 6-minute sham AOT and MI session. Every patient was evaluated to assess the percentage of AMI on the QF before (T0) and after (T1) the assigned treatment following the gold standard Twitch Interpolated Technique. Both groups sat on an isometric dynamometric chair (COR1, OT-Bioelettronica, Torino) with a load cell (FORZA, OT-Bioelettronica, Torino) designed to detect and map the strenght generated by the QF muscle. Upper body movements were limited by crossover shoulder harnesses, a belt across the abdomen and the subjects were asked to keep their arms crossed holding onto the harness while performing the evaluation.
Three large electrodes (10x13cm) were positioned over the quadriceps muscle belly. Two sEMG electrodes (FREEEMG, BTS, Italy) were positioned on the Vastus Medialis and Vastus Lateralis using the SENIAM protocol.
Right after the first evaluation (T0), both groups performed an AOT session. The experimental group was shown a video (4 minutes) in which a subject (matched for age, sex, and limb affected) performed, in third person view, quadriceps concentric contractions for 2 minutes and isometric contractions for 2 minutes. The video contained visual elements indicating the maximality of the effort. After both concentric movement video and isometric movement video the subjects performed a MI session (2 sessions, 1 minute in length each), in which they were asked to imagine in first person the action just seen in the video.
On the other hand, the control group was shown a video of landscapes (4 minutes in length). Halfway through and at the end of the video they were asked to imagine what they had just seen for 1 minute. After the session of AOT and MI (T1) both groups were re-evaluated in the same way as previously described.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Experimental: AOT + MI group The AOT + MI group was shown a video (4 minutes) in which a subject (matched for age, sex, and limb affected) performed, in third person view, quadriceps concentric contractions for 2 minutes and isometric contractions for 2 minutes. The video contained visual elements indicating the maximality of the effort. After both concentric and isometric movement video the subjects performed a MI session (1 minute in length each), in which they were asked to imagine in first person the action previously observed in the video. |
Other: AOT + MI
During the AOT session, the patients were shown a video containing motor contents. In particular, the video demonstrated quadriceps concentric and isometric contractions, presented in the third person perspective. At the conclusion of each video, the patients were asked to spend 1 minute imagining what they had just seen.
|
| Sham Comparator: Control group The control group was shown a video of landscapes (4 minutes in length). Halfway through and at the end of the video they were asked to imagine what they had just seen for 1 minute. |
Other: Control AOT + MI
The control group was shown a video of landscapes (4 minutes in length). Halfway through and at the end of the video they were asked to imagine what they had just seen for 1 minute.
|
Outcome Measures
Primary Outcome Measures
- Changes in arthrogenic muscle inhibition (estimated through Interpolated Twitch Technique) [1- Before AOT+MI session; 2- Immediately after AOT+MI session]
Changes in arthrogenic muscle inhibition (AMI) of the quadriceps muscle before and after AOT and MI session on patients with advanced stage gonarthrosis.
Eligibility Criteria
Criteria
Inclusion Criteria:
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patients with end-stage knee ostheoarthritis undergoing primary total knee arthroplasty
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Active knee flexion > 45°
Exclusion Criteria:
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Previous lower limb orthopedic surgery
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Concomitant neurological, orthopedic, cardiovascular disorders
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Cognitive impairments or psychiatric disorders
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Istituto Clinico Humanitas | Rozzano | Italy | 20089 |
Sponsors and Collaborators
- Istituto Clinico Humanitas
Investigators
None specified.Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- CLF22/07