: This intrinsic muscle on the top of the foot assists the EDL in extending toes 2, 3, and 4.
: These deep foot muscles also assist in extending the interphalangeal joints through their attachment to the extensor expansions. The Role of the Extensor Expansion : This intrinsic muscle on the top of
: This muscle originates in the leg and its tendons insert on the middle and distal phalanges of the lateral four toes. Its primary strength is extending the metatarsophalangeal (MTP) joints, but it contributes to extension at the interphalangeal (IP) joints including the DIP. : This intrinsic muscle on the top of
If the EDL acts entirely on its own without help from the intrinsic muscles, it tends to (the base of the toe) while the interphalangeal joints remain slightly bent. The intrinsic muscles like the lumbricals are needed to "fine-tune" the pull, allowing the toes to straighten completely without curling. : This intrinsic muscle on the top of
