In any animal,
– regardless of its prior history,
– painful stimulation of the foot CAUSES the leg to be withdrawn by bending at all its joints.
This [i.e., withdrawn] flexor reflex is an example of
– an unconditioned reflex, [without being initiated by mind/kinaesthesia] […][αυτοματισμός]
– an innate response [exists without learning, immediate response]
– based on fixed connections in the chain of neurons from the receptor (sensor) to the effector.