recoveriX upper and lower limb training is moving beyond single-limb programs. A 2024 study in Frontiers in Neuroscience investigated what happens when stroke survivors complete two consecutive brain-computer interface (BCI) rehabilitation blocks—first for the arm/hand, then for the leg/gait—using recoveriX system.

The key question: Do gains stop after the first 25 sessions, or can patients keep improving with a second BCI treatment?
This paper provides encouraging evidence that improvements can continue.

The publication at a glance

Title: Upper extremity training followed by lower extremity training with a brain-computer interface rehabilitation system
Journal/Date: Frontiers in Neuroscience, March 4, 2024
DOI: 10.3389/fnins.2024.1346607
Participants: 19 stroke patients with both upper- and lower-limb hemiparesis
Intervention: 25 recoveriX sessions for upper extremity, followed by 25 BCI sessions for lower extremity
System: Motor-imagery BCI with EEG + functional electrical stimulation (FES) + a realistic 3D avatar (recoveriX)

Why this study matters

Most clinical BCI rehabilitation studies focus on one target: either the hand/arm or gait. But real-world stroke rehab is rarely isolated. Patients typically need progress across multiple functions—hand use, mobility, balance, and daily living activities.

This study is valuable because it addresses a practical, clinic-relevant scenario:
What if you continue recoveriX rehabilitation with a second treatment block instead of stopping after the first?

What the BCI training looked like

During recoveriX therapy for the upper and lower limb, patients performed motor imagery (MI), mentally rehearsing a movement, while the system monitored brain activity via EEG.

Core components

• EEG (16 channels) over sensorimotor regions
• Motor imagery tasks (left vs. right cues)
• Closed-loop feedback
  • Visual: a realistic avatar performs the movement
  • Proprioceptive: FES triggers to produce movement or muscle contraction when the MI is correctly detected

Session structure (simplified)

• 2–3 recoveriX sessions per week, up to ~3 months per block
• Each recoveriX session included multiple runs and repeated MI trials
• Feedback was only delivered when the system detected the correct MI class—this is the “closed loop” element designed to reinforce intention-to-feedback coupling

Results after the upper extremity block (first 25 sessions)

The primary upper-limb outcome was the Fugl-Meyer Assessment – Upper Extremity (FMA-UE).

Upper-limb improvements (group-level)

• FMA-UE improved by 4.2 points (p < 0.001)
• Activities of daily living improved (Barthel Index increased)
• Spasticity improved in wrist and fingers (clinically relevant reductions reported)

Why this matters clinically:
An average gain of ~4 points in FMA-UE is meaningful—especially because many participants were severely impaired at baseline. Even when fine hand control is limited, reducing spasticity and improving selective activation can translate into better practical use and easier care.

Results after the lower extremity block (second 25 sessions)

The primary lower-limb outcome was walking speed via the 10-Meter Walk Test (10MWT).

Gait, mobility, and tone improvements

• 10MWT walking speed increased by 0.15 m/s (p = 0.001)
  • Reported as a substantial meaningful change
• Timed Up and Go (TUG) improved (faster performance; strong signal for better mobility and dynamic balance)
• Ankle spasticity decreased (clinically relevant improvement)
• Interestingly, FMA-UE also improved again during the lower-limb block (upper-limb motor function continued to change even while training the leg)

Plain-language interpretation:
Patients didn’t just walk a bit faster. The pattern suggests broader gains in mobility + balance + ankle tone, which affects safety and independence.

The most important finding: progress continued

The headline insight from this paper is simple and clinically useful:

Improvements did not stop after the first 25 recoveriX sessions.
Patients showed additional functional gains after the second treatment block of 25 recoveriX sessions.

For clinics and rehab programs, this directly challenges the assumption that recoveriX gains are “front-loaded” and then plateau quickly. This study suggests that sequencing recoveriX upper and lower limb training may extend the rehabilitation window—especially for people beyond the early post-stroke period.

What this suggests about how BCI may help

BCI rehabilitation is often described as a way to reinforce neuroplasticity by pairing:

1. motor intention (MI-related brain activity)
   with
2. immediate sensory feedback (FES + avatar)

That tight pairing is the core “learning signal.” In conventional therapy, feedback can occur even when the brain isn’t producing the intended motor pattern. In recoveriX upper and lower limb training, feedback is contingent—so the nervous system repeatedly experiences: “when I produce the right brain state, I get the movement feedback.”

This paper supports the idea that repeating that closed-loop across two body regions can keep functional changes moving.

recoveriX performance: patients could use the system reliably

The study also looked at classification accuracy (how well the recoveriX system detected intended MI).

• Performance was generally good across sessions
• Patients improved accuracy during the upper-limb block
• Accuracy tended to be higher during lower-limb training than upper-limb training
• Upper- and lower-limb performance were moderately correlated (people who performed well in one tended to do well in the other)

Why this matters: it shows that patients can successfully use the recoveriX system across different training phases. If the recoveriX system works reliably for both arm and leg training, running consecutive rehabilitation blocks becomes realistic in everyday clinical practice.

Practical takeaways for clinics and rehab decision-makers

If you’re evaluating recoveriX upper and lower limb training for stroke rehab programs, this publication supports a few clear ideas:

Two consecutive recoveriX blocks may be worth considering, not just a single 25-session protocol

• Expect improvements across:
  • upper-limb motor function (FMA-UE)
  • walking speed (10MWT)
  • mobility and balance (TUG)
  • spasticity (hand/fingers and ankle)

The fact that patients improved again after the second block is clinically relevant for:

• chronic survivors who feel “stuck”
• programs aiming for broader independence outcomes

Conclusion

This 2024 Frontiers in Neuroscience study provides strong feasibility and outcome data for recoveriX upper and lower limb training delivered sequentially in the same patients. After 25 sessions targeting the arm/hand, patients improved upper-limb function and spasticity. After a second 25-session block targeting the leg/gait, patients improved walking speed, mobility, ankle spasticity—and even showed further gains in upper-limb function.

The central message is practical: recoveriX upper and lower limb training benefits may continue beyond an initial treatment block, making multi-phase BCI programming a compelling direction for stroke neurorehabilitation.