Going to have to produce my own version of this. This one is by “unmutedlark” on Tumblr.
Remember, although the nature of sore spots in muscle is still amazingly unclear, muscle tissue is definitely sensitive (see Graven-Nielsen et al), and can be a potent source of nociceptive pain (pain originating from noxious stimuli). A few internal tissues are insensate (cartilage, lung, brain), but not muscle tissue.[Go to the link featured in this post]
Medically accurate muscle chart
Orginally Published At: Pain Science