Knee-jerk reflex and Unconditioned reflex

Knee-jerk reflex noun - A reflex extension of the leg resulting from a sharp tap on the patellar tendon.

Unconditioned reflex and knee-jerk reflex are semantically related. In some cases you can use "Unconditioned reflex" instead a noun phrase "Knee-jerk reflex".

Unconditioned reflex noun - An automatic instinctive unlearned reaction to a stimulus.

Knee-jerk reflex and unconditioned reflex are semantically related. Sometimes you can replace phrase "Knee-jerk reflex" with "Unconditioned reflex", this phrases are similar.