Please indicate which EACH one of these descriptions is (either afferect, efferent, both afferent and efferent, or association):
1. neuron type found in posterior horn
2. neuron type found in anterior horn
3. neuron type in dorsal root ganglion
4. fiber type in ventral root
5. fiber type in dorsal root
6. fiber type in spinal nerve
Various neuron and fiber types found in the spinal cord are identified.