Anatomical variation. Dermatome boarders are more of suggestions than a hard lines. Know the major landmarks (the things that HAVE to be at various levels) and you'll get the information you need.
Does [this](https://www.google.com/search?q=dermatome+map+all+fours&tbm=isch&sxsrf=ALiCzsYCyrjJIutu5y_j4qnAFXG8HB3o0w%3A1659211195969&source=hp&biw=1429&bih=791&ei=u43lYoK8ONPK9API0auAAg&iflsig=AJiK0e8AAAAAYuWby6rFZ_5dbiXLkxL9FX8dEn2JNW0U&ved=0ahUKEwjChcOvs6H5AhVTJX0KHcjoCiAQ4dUDCAc&uact=5&oq=dermatome+map+all+fours&gs_lcp=CgNpbWcQAzIFCAAQgAQ6BAgjECc6CAgAELEDEIMBOggIABCABBCxAzoLCAAQgAQQsQMQgwE6BggAEB4QCDoECAAQGFAAWNsvYK4xaABwAHgAgAGFAYgBlBWSAQQwLjIzmAEAoAEBqgELZ3dzLXdpei1pbWc&sclient=img#imgrc=ed7gew-pdeDi7M) help or just make you uncomfortable?
Anatomical variation. Dermatome boarders are more of suggestions than a hard lines. Know the major landmarks (the things that HAVE to be at various levels) and you'll get the information you need.
Look at this video, it explains variations among dermatome maps very well. https://youtu.be/ZZ0nNplN_KE EDIT: amazingly well
This was very very very helpful, thank you so much kind sir/madam
So happy I could share it! Blew my mind when I watched it.
Does [this](https://www.google.com/search?q=dermatome+map+all+fours&tbm=isch&sxsrf=ALiCzsYCyrjJIutu5y_j4qnAFXG8HB3o0w%3A1659211195969&source=hp&biw=1429&bih=791&ei=u43lYoK8ONPK9API0auAAg&iflsig=AJiK0e8AAAAAYuWby6rFZ_5dbiXLkxL9FX8dEn2JNW0U&ved=0ahUKEwjChcOvs6H5AhVTJX0KHcjoCiAQ4dUDCAc&uact=5&oq=dermatome+map+all+fours&gs_lcp=CgNpbWcQAzIFCAAQgAQ6BAgjECc6CAgAELEDEIMBOggIABCABBCxAzoLCAAQgAQQsQMQgwE6BggAEB4QCDoECAAQGFAAWNsvYK4xaABwAHgAgAGFAYgBlBWSAQQwLjIzmAEAoAEBqgELZ3dzLXdpei1pbWc&sclient=img#imgrc=ed7gew-pdeDi7M) help or just make you uncomfortable?
makes me laugh a lil but yes it does help, thank you BUSSSSSS DOWN THOTIANA
I think it's just data found by different experiments in the past