GROSS ANATOMY
SKULL OSTEOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
The Metocarpophalangeal Joint (MCP) of the thumb flexes and extends, itdoes NOT abduct and adduct.
|
|
True
|
|
|
False
|
|
|
Either A or B
|
|
|
None of the above
|
Explanation:
Detailed explanation-1: -Abduction/adduction of the thumb occur within the sagittal plane and flexion/extension of the thumb occur within the frontal plane because the thumb rotated approximately 90 degrees evolutionarily.
Detailed explanation-2: -The MCP joint is extended by the torque generated by the extensor tendon passing the joint carrying a force and possessing an extension moment arm.
Detailed explanation-3: -Similar to other joints in the body, the MCP joints are acted upon by muscles to allow for specific joint movements. These movements include flexion, extension, abduction, adduction, and limited circumduction.
There is 1 question to complete.