Hello all, I am hoping you can answer some questions that I've been itching for answers lately...

1. Are there sensory neurons that connect directly to motor neurons in humans, without an interneuron in between?
2. Can a single sensory neuron directly connect to multiple inter or motor neurons?
3. Is this chain of connections possible? sensory neuron > interneuron 1 > interneuron 2 > interneuron 3 > interneuron 1
4. Do some sensory neuron to motor neuron connections have more interneuron chains than others?

Thanks!