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But, like most mysteries of the brain, this one involving motor control is not fully understood by scientists.
但是,就像最神秘的大腦一樣,科學家還沒有完全理解這一涉及運動控制的動作。
However, scientists believe that the mental effort required to hold your hand still causes the muscles in your hand to contract a bit at regular intervals and therefore experience a tremor, even under normal circumstances.
然而,科學家認為,手部靜止必需的心力造成你的手部肌肉有有規律間隔的收縮,因此甚至在正常情況下也發生了抖動現象。
When you're nervous, the part of your brain that regulates your anxiety interferes with the response cycle between the cortex and the basal ganglia, increasing the severity of these muscle contractions and thereby altering your ability to accurately control the position of your hand.
當你緊張時, 大腦負責調節你焦慮干擾的部分會介入皮層和基底神經節之間的響應周期,增加肌肉收縮,從而改變準確地控制自己手部位置的能力。
Though your hand will shake a little bit under normal conditions, it will shake a lot more when these nervous feelings influence your hand position control.
雖然正常情況下你的手會抖動一點點,但當緊張情緒上升影響你對于手部位置的控制時抖動會更多。
