S1 spinal nerve compression affects the ankle-jerk reflex, while L4 nerve compression affects the knee-jerk reflex.

S1受压迫可影响踝反射；而L4受压迫可影响膝反射。

Nerve compression can also cause paraesthesia, which is weakness, numbness, and a tingling sensation in the arms and hands.

神经受压也会导致感觉异常，如上臂和手部无力、麻木和针刺感。

Another cause of nerve compression is spinal stenosis, which is the narrowing of the spinal canal or intervertebral foramen.

神经受压迫的另一个原因是椎管狭窄，即椎管或椎间孔的狭窄。