The present study investigates the effect of sensory deprivation of the index and middle finger on motor function of all digits during maximal voluntary force production tasks. A total of 27 subjects performed maximal isometric pressing tasks by using different instructed finger combinations. Subjects completed the same tasks in two visits: a control visit when they had normal sensory feedback in all fingers, and an anesthesia visit when digital nerve blocks were performed on their right index and middle fingers. We evaluated three aspects of motor adaptation on both local (anesthetized) and non-local (non-anesthetized) digits during maximal force production: (1) task-relevant and overall force magnitude, (2) force directional application, and (3) digital individuation and force sharing. Our results indicate that selective digital anesthesia resulted in decreased maximal force magnitude, changed direction of force production, and significant changes extended to non-local digits. The motor weakness and inefficiency revealed in the non-local digits implies that sensory information from each digit can be shared across the digits to assist motor execution within the same hand.

中文翻译：

---

感觉剥夺对从本地数字到非本地数字的最大力量能力的影响。

本研究调查了在最大的自愿力量生产任务中食指和中指的感觉剥夺对所有手指运动功能的影响。共有27位受试者通过使用不同的指示手指组合执行了最大的等距按压任务。受试者在两次探访中完成了相同的任务：当他们的所有手指的感觉反馈正常时进行对照访视；当对他们的右手食指和中指进行数字神经阻滞时进行麻醉访视。我们在最大力产生过程中评估了局部（麻醉的）和非局部（非麻醉的）手指运动适应的三个方面：（1）与任务有关的力和整体力的大小；（2）作用力的方向；（3）数字个性化和力量共享。我们的结果表明，选择性数字麻醉导致最大力量降低，力量产生方向改变，并且显着改变扩展到非局部数字。非本地数字显示出的运动弱点和效率低下意味着可以在每个数字之间共享来自每个数字的感觉信息，以帮助同一只手进行运动。