The correct answer is 2. The flexor digitorum profundus flexes the distal interphalangeal (DIP) joints of the index, middle, ring, and little finger and assists in flexing the proximal interphalangeal (PIP) and metacarpophalangeal (MCP) joints.
The correct answer is 2. The flexor digitorum profundus flexes the distal interphalangeal (DIP) joints of the index, middle, ring, and little finger and assists in flexing the proximal interphalangeal (PIP) and metacarpophalangeal (MCP) joints.