NCT05478434

Cortico-cortical Stimulation and Robot-assisted Therapy for Upper Limb Recovery After Stroke (CCS&RAT)

Cortico-cortical Stimulation and Robot-assisted Therapy a New Approach of Upper Limb Functional Recovery After Stroke

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 32 (estimated)
• Sponsor: I.R.C.C.S. Fondazione Santa Lucia · Academic / Other
• Sex: All
• Age: 18 Years – 80 Years
• Healthy volunteers: Not accepted

Summary

The purpose of this study is to tested the effect of combination of a paired associative stimulation of two functional interconnected areas of the cerebral cortex (posterior-parietal cortex and primary motor cortex) with robot-assisted therapy in the recovery of upper limb after stroke.

Detailed description

BACKGROUND Stroke survivors reported upper limb impairment that contribute to reducing the overall quality of life, social participation and professional activities. The impairment of the upper limb is due to motor and sensory alteration that could compromise the sensorimotor integration. The posterior parietal cortex (PPC) is a potential circuit where this integration could occur during active somatosensation. Indeed, PPC is a site of massive confluence of visual, tactile, proprioceptive, and vestibular signals. This area may be involved in transforming information about the location of targets in space, into signals related to motor intentions. This process likely occurs through parietal-motor connections, which are known to be involved in the transfer of relevant sensitive information for planning, reaching, and grasping. Paired associative stimulation (PAS) of PPC and primary motor area (M1), by means of bi-focal trans-cranial magnetic stimulation, can modulate M1 excitability. This information reinforces the hypothesis that modulation of PPC-M1 connectivity can be used as a new approach to modify motor excitability and sensorimotor interaction. Parallel, robot assisted training (RAT) can induce a plastic reorganization at the muscular afferents, spinal motor neurons, interneuron system and beyond and facilitates neural plasticity and motor relearning through goal-oriented training. The robotics device allows to train patients in an intensive, task-oriented, and top-down therapy way, increasing patients' compliance and motivation. The cognitive top-down stimulation is allowed by means of the introduction of visual feedback performed through exergaming. Recently, it has been proposed the development of new intervention strategies that combine neurostimulation of a target brain area with neurorehabilitation, such as physical therapy or virtual reality. Although both TMS and RAT have shown individually promising effects in upper limb recovery after a stroke, their combination has not been tested to date. AIMS 1. To determine whether robot-assisted therapy combined with cortico-cortical non-invasive stimulation of M1 and PPC areas can improve functional recovery of upper extremity in patients with hemiparesis due to stroke. 2. To evaluate the feasibility of robot-assisted training exergaming technology for reaching and grasping training for stroke rehabilitation. 3. To investigate the neurophysiological changes in PPC-M1 connectivity (through TMS EEG) to clarify the effectiveness of PAS on neuromodulation of the PPC-M1 network.

Conditions

• Stroke
• Stroke, Ischemic

Interventions

Type	Name	Description
DEVICE	Cortico-cortical stimulation plus robot-assisted therapy	15 sessions of cortico-cortical stimulation between the PPC and the M1 of the lesioned hemisphere and robot-assisted therapy. Paired-pulse stimulation (PAS) technique, with 5ms inter-stimulus time between the two areas (PPC to M1), will be done through two high-power Magstim 200 machines (Magstim® Rapid²). To stimulate the M1 area, the coil will be placed tangentially to the scalp at a 45° angle to the midline, to stimulate the PPC area the center of the coil will be positioned over P4 (10-20 EEG system) tangentially to the skull with the handle pointing downward and slightly medial (10°). Robot-assisted therapy will be performed with an Armeo® Power II (Hocoma), an integrative system composed by a robotic exoskeleton device connected to a laptop for the audio-visual biofeedback for the upper limb therapy.
DEVICE	Sham cortico-cortical stimulation plus robot-assisted therapy	15 sessions of sham cortico-cortical stimulation between the PPC and the M1 of the lesioned hemisphere and robot-assisted therapy. Sham paired-pulse stimulation (PAS) will be done through two high-power Magstim 200 machines (Magstim® Rapid²). To simulate the real stimulation, the coils will placed in the same sites with different inclination respect to the scalp (90°). Robot-assisted therapy will be performed with an Armeo® Power II (Hocoma), an integrative system composed by a robotic exoskeleton device connected to a laptop for the audio-visual biofeedback for the upper limb therapy.

Timeline

• Start date: 2022-08-21
• Primary completion: 2025-08-01
• Completion: 2025-10-01
• First posted: 2022-07-28
• Last updated: 2025-02-20

Locations

1 site across 1 country: Italy