extension upward of the toes when the sole of the foot is stroked firmly on the outer side from the heel to the front; normal in infants under the age of 2 years but a sign of brain or spinal cord injury in older persons是什么意思_extension upward of the toes when the sole of the foot is stroked firmly on the outer side from the heel to the front; normal in infants under the age of 2 years but a sign of brain or spinal cord injury in older persons在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句