Board of Certification for the Athletic Trainer (BOC) Practice Test

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Study for the Board of Certification for the Athletic Trainer (BOC) Test. Prepare with quizzes, flashcards, and detailed explanations. Boost your readiness and confidence!

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What bone articulates with the first metacarpal?

Capitate
Lunate
Trapezium
Triquetrum

The correct answer is: Trapezium

The correct answer is the trapezium. The first metacarpal bone, which forms the base of the thumb, articulates with the trapezium bone of the wrist. This connection is crucial as it allows for the unique range of motion required for thumb opposition, a key function in hand use and dexterity. The trapezium is one of the carpal bones, specifically located at the base of the first metacarpal, facilitating the saddle joint movement of the thumb that is essential for grasping and manipulating objects. This articulation is vital in many hand movements, from gripping to pinching. The other bones mentioned do not directly connect with the first metacarpal. The capitate is the largest carpal bone and connects with the second and third metacarpals, while the lunate and triquetrum are involved in other wrist articulations and do not engage functionally with the first metacarpal. Understanding these relationships helps clarify the anatomy and function of the hand, particularly in the context of athletic training and rehabilitation.