What brain regions are denoted as M1ul/M1lm and S1ul/S1lm?

Hey all,

I’m looking through the human transcriptomics explorer and I noticed the above terms. I’m guessing M1/S1 is in regards to the primary motor cortex and primary sensory cortex but I’m struggling to understand the difference between the ul/lm suffix.

If you could let me know that would be really helpful, I couldn’t find any information.

Thanks

These regions are the upper and lower limb regions of primary motor and somatosensory cortex. The abbreviations ul and lm come from our reference atlas (e.g., click on the + next to M1C in the hierarchy). I hope this helps!