The growth cones of two neurons sense and interact with one another.
The average person has no difficulty raising a coffee mug.
Genetically engineered mice lacking proprioceptive sensory axons are not capable of well-coordinated walking.
A knee-jerk reflex depends on a simple circuit of proprioceptive sensory neurons and spinal motor neurons.
Even without visual feedback, we are able to negotiate an obstacle using spatial memory.
Proprioceptive feedback makes it easy to touch one's thumb to one's fingers without looking.
In the absence of proprioception and visual feedback, it is impossible to touch thumb to fingers accurately.
A person with a disease that kills proprioceptive neurons has severe problems with the simplest of movements.