Multiple Choice
Decreasing the angle between bones is called __________.
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8. Joints
Joint Movements
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What motion is ONLY possible at the thumb?
A
extension
B
adduction
C
opposition
D
flexion
Verified step by step guidance1
Understand the unique anatomy of the thumb: The thumb is distinct from other fingers due to its saddle joint, which allows for a greater range of motion.
Identify the types of movements possible at the thumb: These include flexion, extension, abduction, adduction, and opposition.
Define opposition: Opposition is the movement that brings the thumb across the palm to touch the tips of the other fingers, a motion unique to the thumb.
Compare opposition with other thumb movements: While flexion, extension, abduction, and adduction are common to other fingers, opposition is exclusive to the thumb due to its unique joint structure.
Conclude that opposition is the only motion exclusive to the thumb, enabling the grasping function that is crucial for hand dexterity.
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