From Catholic teaching of soul and science teachings of brain function:
-consciousness does not come under the “functions” of soul, but from the brain stem
- creativity does not come under the “functions” of soul, but from the right cerebral hemisphere
-logical thinking does not come under the “functions” of soul, but from the left cerebral hemisphere
-free will (free will is about making one’s own decision - not being forced by another - not by another person - or not by another Spirit.) The left cerebral hemisphere is important for logic and rational thinking. (God allows us to use our own logic and thinking to make our own decisions - that is free will.)
-memory does not come under the “function” of soul but from the temporal lobes
These functions you listed are related to the design of the human body. They are not related to the human soul.
The soul and the human body are not the same.
Together the soul and body and mind - makes the human person.
The word soul can be interchanged with the word spirit - we are mind, body, and spirit.
Bahman: The relevant question is why and how these phenomena could be subject of change if they are related to self.
The answer to your question is these are functions of the human brain not of the human soul. Functions of the human body, including the human brain, are subject to change.
(I don’t know what “self” refers to as you write it. From your thread title, it seems you interchange “self” with “soul”.)
What is your answer to your question?