What is the type of joint between the carpal and first metacarpal?

Answer 1

Wikipedia says

"The joints between the carpus and the second, third, fourth, and fifth metacarpal bones are arthrodial.

The bones are united by dorsal, volar, and interosseous ligaments."

Another article from wikipedia says

"A plane joint (arthrodial joint, gliding joint, plane articulation) is a synovial which, under physiological conditions, allows only gliding movement"

http://en.wikipedia.org/wiki/Plane_joint

http://en.wikipedia.org/wiki/Carpometacarpal_joints.

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So the answer is

*The first carpometacarpal joint(thumb) is a saddle joint and

*The second,third,fourth and fifth CMC joints are plane joints.

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Answer 2

saddle joint because it involves both a convex and a concave joint end

The carpometacarpal joint is a joint in the wrist that articulates the carpal bones and the metacarpals.

Movements

In this articulation the movements permitted are flexion and extension in the plane of the palm of the hand, abduction and adduction in a plane at right angles to the palm, circumduction, and opposition.

It is by the movement of opposition that the tip of the thumb is brought into contact with the volar surfaces of the slightly flexed fingers.

Saddle Joint