medial belly: muscular branches of ulnar nerve lateral head: lateral sesamoid bone of metatarsophalangeal joint, proximal phalanx of great toe transverse head: metatarsophalangeal joints, ligaments of lateral 3 toes The muscles are described using anatomical terminology.
There does not appear to be a definitive source counting all skeletal muscles.
[14][15] There are between 600 and 840 muscles within the typical human body, depending on how they are counted.
[20] This can be a bit misleading as, in general, it is groups of muscles working together to either make or cancel a movement.
[21] The present table lists some well-known relationships but is not at all complete.