Home / Health / Spinal Cord Injury Makes Movement Jerky, Study Finds
Spinal Cord Injury Makes Movement Jerky, Study Finds
16 Apr
Summary
- Nervous system signals spread unevenly across muscles after injury.
- Low exertion causes shaky movements; high exertion leads to less refined signals.
- Findings may help develop new rehabilitation strategies for spinal cord injuries.
New research suggests that the nervous system's adaptation to spinal cord injury leads to uneven muscle coordination, explaining ongoing difficulties with walking and balance for those who have partially recovered. Scientists observed that the nervous system struggles to distribute signals smoothly across muscles during low-level exertion, resulting in shaky and unstable movements.
Conversely, at higher exertion levels, the nervous system appears to overcompensate by sending louder, less refined signals. This rigidity prevents the adaptive approach seen in healthy individuals, who can adjust their neural drive strategy based on force demands.
The study, involving participants recovering from spinal cord injuries and healthy controls, utilized electrical sensors to track motor units, the nerve-muscle connections responsible for movement. The insights gained could pave the way for novel neurorehabilitation strategies tailored to re-tune spinal cord control and restore coordinated neural input.
