Any nerves/fibers in foot similar to ulnar nerve in elbow?
Why would peripheral anatomy determine subjective sensation? In the end, the cerebral cortex determines the sensation associated with peripheral input. Rewired hamsters can have visual sensations in their auditory cortex (Frost et al., 2000) and visual sensations through tactile stimulation have been reported in man (Ortiz et al., 2011). 

The sensations you describe are related to tactile stimulation of peripheral nerves. Peripheral nerves are pretty homogenous, and typically carry a bunch of afferent nerve fibers up to the somatosensory cortex.

References
- Frost et al., PNAS (2000); 97(20): 11068–73
- Ortiz et al., PLOSone (2011)