Daijiworld Media Network – New Delhi

New Delhi, Mar 30: New research has found that trunk control in patients with acute ischemic stroke may be closely associated with the resting tone and stiffness of key posterior trunk muscles, offering potential early indicators of recovery.

In a cross-sectional study, researchers assessed 30 stroke survivors within 72 hours of symptom onset to examine whether the mechanical properties of specific muscles correlate with trunk control and overall disability. Trunk control was evaluated using the Trunk Impairment Scale, while global disability was measured through the modified Rankin Scale.

The study focused on muscles including the Longissimus Thoracis, Lumbar Multifidus, Trapezius, and Rectus Femoris. Findings revealed a strong correlation between trunk control and the tone as well as stiffness of the Longissimus Thoracis, along with stiffness of the Lumbar Multifidus. A moderate link was also observed with Lumbar Multifidus tone. However, no significant association was found with the Trapezius or Rectus Femoris.

Among all muscles analysed, the Longissimus Thoracis emerged as the most significant marker. Its stiffness showed a strong negative correlation with disability scores, indicating that higher stiffness was associated with better functional outcomes. Further analysis identified both tone and stiffness of this muscle as independent predictors of trunk control.

Researchers noted that the anatomical role of the Longissimus Thoracis in maintaining trunk stability could explain its stronger link to recovery compared to other muscles.

The findings highlight the potential clinical relevance of assessing resting muscle properties early after stroke. According to the study, evaluating posterior trunk muscles—especially the Longissimus Thoracis—may help in identifying patients’ recovery potential and guiding early rehabilitation strategies.

However, experts emphasised that further research is required to determine whether these measurements can be routinely used to plan targeted interventions in stroke rehabilitation.