Multiple Choice
Which of the following statements is true regarding the extensor mechanism of the fingers?
A) Lumbricales and interossei allow active metacarpophalangeal (MCP) joint flexion,and proximal interphalangeal (PIP) and distal interphalangeal (DIP) joint extension.
B) Extensor digitorum extends the PIP and DIP joints,but not the MCP joint.
C) Lumbricales and interossei work to extend the MCP joint against the force of the long finger flexors.
D) Extensor digitorum is the only muscle that can extend the DIP joint.
Correct Answer:
Verified
Correct Answer:
Verified
Q24: What role do the ligaments of the
Q25: Tip-to-tip prehension involves which of the following
Q26: Which ligament blends with the triangular fibrocartilage
Q27: This structure of the extensor mechanism lies
Q28: Describe the joint capsule of the midcarpal
Q30: Describe the radiocarpal joint,including its articular surfaces,its
Q31: Compare the joint structure of the metacarpophalangeal
Q32: What is the major function of the
Q33: Which of the following muscles act as
Q34: At what points in the range do