Grip force control during object manipulation in cervical myelopathy,Spinal Cord

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Grip force control during object manipulation in cervical myelopathy
Spinal Cord ( IF 2.1 ) Pub Date : 2020-01-15 , DOI: 10.1038/s41393-020-0414-x
Naoto Noguchi ₁ , Bumsuk Lee ₂ , Shoya Kamiya ₃ , Ken Kondo ₄ , Ryoto Teshima ₅ , Masatake Ino ₆ , Koji Tanaka ₂ , Tsuneo Yamazaki ₂

Affiliation

Study design

Cross-sectional research.

Objectives

To objectively evaluate grip force (GF) control while holding a freely movable object in individuals with cervical myelopathy (CM).

Setting

Harunaso Hospital, Takasaki, Japan.

Methods

We studied 52 hands from 26 individuals with CM. Participants performed a grip-and-lift task by pulp pinch using the thumb and index finger before surgery. We monitored individual finger GF (N) during the first 3 s while lifting and holding an object. Correlations between the GF and other clinical tests were evaluated. A multiple stepwise regression analysis was used to examine the contribution of the GF to the severity of clinical symptoms.

Results

Thumb GF was negatively correlated with the 10-s test (rs = −0.32), and index finger GF was positively correlated with its cutaneous pressure threshold (rs = 0.34). Multiple regression for the severity of upper extremity symptoms revealed that the model including the GF had a larger adjusted R² and a lower AIC value than that of conventionally used clinical tests.

Conclusions

These results suggested that the assessment of individual finger GF control could provide an indicator of the clinical severity of upper extremity in individuals with CM.

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