Scelta multipla
The joint that permits the greatest range of mobility of any joint in the body is the __________ joint.
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8. Joints
Classification of Joints
Scelta multipla
The joint at the base of the thumb is an example of a(n) __________ joint.
A
saddle
B
gliding
C
pivot
D
ellipsoidal
E
hinge
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Begin by understanding the types of synovial joints. Synovial joints are classified based on the shapes of the articulating surfaces and the types of movement they allow.
Review the characteristics of each type of joint mentioned in the problem: saddle, gliding, pivot, ellipsoidal, and hinge.
Saddle joints are characterized by articulating surfaces that are concave in one direction and convex in the other, resembling a saddle. This allows for movement in two planes, such as flexion-extension and abduction-adduction.
Consider the anatomy of the thumb. The joint at the base of the thumb, known as the carpometacarpal joint, allows for a wide range of movements including opposition, which is crucial for grasping objects.
Identify the joint type that matches the description of the thumb's carpometacarpal joint. Given its ability to move in multiple directions and perform opposition, the saddle joint is the correct classification.
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