alexa Grip force control in patients with neck and upper extremity pain and healthy controls.
Psychiatry

Psychiatry

Journal of Addiction Research & Therapy

Author(s): Huysmans MA, Hoozemans MJ, Visser B, van Dien JH

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Abstract OBJECTIVE: To investigate whether sensory and motor problems in patients with non-specific neck and upper extremity pain can be ascribed to a deficit of sensory-motor integration. METHODS: Grip force control and adaptation were measured in 81 cases, 32 former cases and 39 healthy controls, during repetitive lifting and holding of an object. The object (300 g) was lifted vertically over 20 cm and held for 5s, using the dominant arm (the affected arm in all cases). The object was novel to the subjects when lifted for the first time, and was lifted five times consecutively. Grip forces orthogonal to the object's surface and its vertical acceleration were measured. RESULTS: Cases used significantly higher grip forces than both other groups, while vertical acceleration was not different. After the initial lift, all groups significantly reduced the maximum grip force. CONCLUSIONS: Subjects with neck and upper extremity pain consistently use higher grip forces than controls, but adjust grip forces by a similar amount after the first lift. Compensation of impaired sensory information rather than a general deficit in sensory-motor integration seems to account for these findings. SIGNIFICANCE: Non-specific neck and upper extremity pain coincides with objectifiable changes in control of grip force. This article was published in Clin Neurophysiol and referenced in Journal of Addiction Research & Therapy

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