In addition to the Heart, which organ is involved in concentrating, memorizing, and thinking (Yi)?

The Spleen plays a crucial role in the process of concentrating, memorizing, and thinking, as it is traditionally associated with the mental aspect known as Yi, which translates to "thought" or "intellect." In Traditional Chinese Medicine, the Spleen is believed to be responsible for the transformation and transportation of nutrients and is closely linked to the body's ability to process information both physically and cognitively.

When the Spleen functions optimally, it nourishes the Heart, which houses the Shen (spirit or mind), thus supporting mental clarity and cognitive functions. Conversely, if the Spleen is weakened or imbalanced, cognitive functions may decline, leading to difficulties in thinking, concentrating, and remembering. Therefore, the Spleen's role in nurturing the mind is foundational in TCM, especially in regard to the intellect and mental activities.

Each of the other organs mentioned has its own distinct functions in TCM, but they are not primarily associated with concentration, memory, and thought processes in the same way the Spleen is. The Heart is crucial for overall mental activity but does not directly handle the processing and digestion of thoughts and ideas like the Spleen does.