Schaefer Laura V, Dech Silas, Bittmann Frank N
Regulative Physiology and Prevention, Department Sports and Health Sciences, University Potsdam, Germany.
Heliyon. 2021 Aug 19;7(8):e07827. doi: 10.1016/j.heliyon.2021.e07827. eCollection 2021 Aug.
The link between emotions and motor control has been discussed for years. The measurement of the Adaptive Force (AF) provides the possibility to get insights into the adaptive control of the neuromuscular system in reaction to external forces. It was hypothesized that the holding isometric AF is especially vulnerable to disturbing inputs. Here, the behavior of the AF under the influence of positive (tasty) vs. negative (disgusting) food imaginations was investigated. The AF was examined in n = 12 cases using an objectified manual muscle test of the hip flexors, elbow flexors or pectoralis major muscle, performed by one of two experienced testers while the participants imagined their most tasty or most disgusting food. The reaction force and the limb position were measured by a handheld device. While the slope of force rises and the maximal AF did not differ significantly between tasty and disgusting imaginations (p > 0.05), the maximal isometric AF was significantly lower and the AF at the onset of oscillations was significantly higher under disgusting vs. tasty imaginations (both p = 0.001). A proper length tension control of muscles seems to be a crucial functional parameter of the neuromuscular system which can be impaired instantaneously by emotionally related negative imaginations. This might be a potential approach to evaluate somatic reactions to emotions.
情绪与运动控制之间的联系已被讨论多年。自适应力（AF）的测量为深入了解神经肌肉系统对外力反应的自适应控制提供了可能。据推测，等长保持AF特别容易受到干扰输入的影响。在此，研究了在积极（美味）与消极（恶心）食物想象影响下AF的行为。在n = 12例受试者中，由两名经验丰富的测试者之一对髋屈肌、肘屈肌或胸大肌进行客观化的徒手肌力测试，同时让受试者想象他们最美味或最恶心的食物，以此来检测AF。通过手持设备测量反作用力和肢体位置。虽然在美味和恶心想象之间，力上升的斜率和最大AF没有显著差异（p > 0.05），但与美味想象相比，在恶心想象下最大等长AF显著更低，振荡开始时的AF显著更高（两者p = 0.001）。肌肉适当的长度 - 张力控制似乎是神经肌肉系统的一个关键功能参数，它可能会因与情绪相关的消极想象而瞬间受损。这可能是评估情绪的躯体反应的一种潜在方法。
