Please think a little more about what it is you need to know,
then ask the question in way that it can be answered.
Thumb abduction and adduction is in the sagittal plane. However, finger abduction and adduction is in the frontal/coronal plane. Do these movements in the anatomical position and that will help you see that the thumb is not abducting or adducting in the frontal plane rather the sagittal plane.
Yes, the fingers are distal to the palm. In anatomical terms, "distal" refers to a position further from the center of the body or point of attachment, while "proximal" refers to a position closer to the center. Since the fingers are located at the end of the hand, beyond the palm, they are indeed considered distal to it.
Moving the hand into a palm-down position involves wrist pronation. This movement is achieved by the pronator teres and pronator quadratus muscles, which rotate the forearm so the palm faces downwards.
The volar aspect of a finger refers to the palm side or underside of the finger. It is the surface that faces towards the palm when the hand is in a neutral position.
The opposite of the palm of your hand is the back of your hand. While the palm is the inner surface that faces you when your hand is open, the back of the hand is the outer surface that faces away.
The palm is up in the anatomical position. This is also when the forearm is supinated.
The action that moves the palm of the hand into anatomical position is called supination. This movement involves rotating the forearm so that the palm faces anteriorly or upward.
In the anatomical position of the hand the palm faces to anterior side. Because you use your palm as you flex it. You do not use the dorsal aspect of the hand normally. So in the anatomical position the palm faces on the anterior side. That way the thumb comes on lateral side to the fingers.
Supination.
Pronation
In the anatomical position of the hand the palm faces to anterior side. Because you use your palm as you flex it. You do not use the dorsal aspect of the hand normally. So in the anatomical position the palm faces on the anterior side. That way the thumb comes on lateral side to the fingers.
Thumb abduction and adduction is in the sagittal plane. However, finger abduction and adduction is in the frontal/coronal plane. Do these movements in the anatomical position and that will help you see that the thumb is not abducting or adducting in the frontal plane rather the sagittal plane.
In the anatomical position of the hand the palm is facing forward. The thumb is placed in contact with the index finger. You can see the picture of the anatomical position. It is better to see than describe the same.
Pronation and supination of the forearm occur in the transverse plane. Pronation involves the rotation of the forearm so the palm faces downward, while supination involves the rotation of the forearm so the palm faces upward.
The olecranal region is proximal to the palm
Moving the hand into a palm-down position involves wrist pronation. This movement is achieved by the pronator teres and pronator quadratus muscles, which rotate the forearm so the palm faces downwards.
The volar aspect of a finger refers to the palm side or underside of the finger. It is the surface that faces towards the palm when the hand is in a neutral position.