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  • Transcutaneous...

Transcutaneous stimulation improves hand function in people with complete tetraplegia

Written By : Hina Zahid |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2021-03-26T20:45:24+05:30  |  Updated On 26 March 2021 9:42 PM IST
Transcutaneous stimulation improves hand function in people with complete tetraplegia

During transcutaneous stimulation of the spinal cord, this research participant with tetraplegia is able to voluntarily grip and control a water bottle.

CREDIT

Kessler Foundation/Jody Banks

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East Hanover, NJ. Kessler Foundation researchers demonstrated that spinal cord transcutaneous stimulation (scTS) combined with hand training improves upper extremity and hand function in individuals with motor and sensory compete spinal cord injury (SCI). The study results showed immediate and long-lasting gains in strength, sensibility, and voluntary motor function.

The authors are Fan Zhang, PhD, Kamyar Momeni, PhD, Arvind Ramanujam, MS, Manikandan Ravi, MS, Janelle Carnahan, PT, Steven Kirshblum, MD, and Gail F. Forrest, PhD, affiliated with the Center for Mobility and Rehabilitation Engineering Research and the Tim and Caroline Reynolds Center for Spinal Stimulation at Kessler Foundation.

For people with tetraplegia, recovering hand and upper extremity function is a top priority, as it allows them to regain the ability to perform some everyday tasks. Even a small degree of functional improvement can bring with it increased independence, vastly improving their quality of life.

While previous studies have investigated whether scTS is effective in improving upper extremity and hand function in individuals with motor complete and incomplete cervical SCI, it remained unclear whether scTS can facilitate functional restoration in an individual with motor and sensory complete tetraplegia, according to lead author Dr. Zhang, an associate research scientist at the Reynolds Center for Spinal Stimulation. Moreover, previous studies did not report follow-up testing, leaving open the question of whether scTS had long-lasting benefit.

In this case study, investigators examined the short-term and three-month post-intervention therapeutic effects of non-invasive scTS in restoring upper extremity and hand function in an individual with chronic complete cervical SCI. The study participant, a 38-year-old male who sustained his injury 15 years before study participation, received 18 scTS sessions combined with task-specific hand training over the course of 8 weeks.

Results revealed significant and long-lasting improvements in upper extremity and hand function. The total score of the Graded Redefined Assessment of Strength, Sensibility, and Prehension improved from 72/232 at baseline to 96/232 at post-intervention, and scores maintained a range from 82/232 to 86/232 during three-month follow-up without any further treatment. Bilateral handgrip force also improved by 283.4 percent in the left, dominant hand, and 30.7 percent in the right hand. These strength gains were sustained at 233.5 percent to 250 percent in the left hand and 11.5 percent to 73.1 percent in the right hand during follow-up evaluation visits.

In addition, changes in spinal motor evoked potentials (sMEP), a neurophysiological test, showed an increased level of spinal network excitability, indicating that scTS can potentially neuro-modulate the spinal network into restoring function in paralyzed limbs.

"We saw both immediate and sustained improvements on handgrip strength and motor control in this participant with complete tetraplegia," said Dr. Zhang. "From the very first session of applying scTS, he demonstrated an immediate enhancement in grip strength." He added, "Voluntary motor control dramatically improved within one single session, with the participant able to successfully lift a water bottle and grasp a tennis ball with stimulation enabled, neither of which were possible without stimulation.

https://ieeexplore.ieee.org/document/9311628


transcutaneoustetraplegiaspinal cord injuryspinal cord transcutaneous stimulationhand function
Source : IEEE Transactions on Neural Systems and Rehabilitation Engineering
Hina Zahid
Hina Zahid

    Hina Zahid Joined Medical Dialogue in 2017 with a passion to work as a Reporter. She coordinates with various national and international journals and association and covers all the stories related to Medical guidelines, Medical Journals, rare medical surgeries as well as all the updates in the medical field. Email: editorial@medicaldialogues.in. Contact no. 011-43720751

    Dr. Kamal Kant Kohli
    Dr. Kamal Kant Kohli

    Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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