The Flexor digitorum superficialis is set underneath the past muscle; it is the biggest of the muscles of the shallow gathering, and emerges by three heads such as humeral, ulnar, and radial
Inception: Medial epicondyle of the humerus
Antagonist: Extensor digitorum muscle
Insertion: Phalanges
Test flexor digitorum superficialis, one finger is flexed at the proximal interphalangeal joint against opposition, while the staying three fingers are held completely reached out (to inactivate flexor digitorum profundus)