Metacarpophalangeal
The three planes are coronal, sagittal, and transverse (you probably knew this already) so a multiaxial joint can move in all three. So to answer the question, it would be three.
A hinge joint (like on a door) can only move in one plane... that is, it can bend one way or the other. Examples include the knee, the joints of the fingers and toes. A saddle joint allows movement in two planes (imagine sitting on a saddle on a horse - you can rock back and forward AND slide off either side). An example is at the base of the thumb - you can move it in 4 directions
Two muscles are not needed to move a joint but a bone attached to a joint in 2 opposite directions .
The elbow moves in two planes of motion: sagittal (flexion and extension) and frontal (adduction and abduction).
A fixed joint is a joint between two bones that doesn'tmove.
A fixed joint is a joint between two bones that doesn'tmove.
No, a pivot joint and a biaxial joint are not the same. A pivot joint allows only rotating movement around one axis, like the movement of the head from side to side. A biaxial joint allows movement in two perpendicular axes, such as the wrist which can move up and down as well as side to side.
In geometry, two planes intersect in a line. The only time this is not true is if the two planes are parallel to each other.
Biaxial joints allow for movement in two planes or axes. A common example of a biaxial joint is the wrist, which allow for movement side to side, and also allows for movement up and down. It can be difficult to determine whether a joint is biaxial or multiaxial, because when the biaxial joint moves in both directions at the same time, it appears to have the multiaxial quality of being able to move in any plane or axes.
It's a 'hinge' joint - it can only move in two directions (forward and back).
ONLY a line can be formed by the intersection of two planes...and always.
The hinge joint represents a moveable connection between two bones. It is special in that it moves only in one plane. That means that the two pieces can move so they are against each other or move so they are apart, just like a door opens and closes.