con sus sentidos correctamente funcionando 28
The appropriate expression is in full use of your or my physical abilities and mental or "my", depending on context. Used in official and solemn, acts as a testament, a wedding, a baptism, or other official and solemn act. It means that it has all their mental abilities in perfect condition; that he is not suffering from mental derangement, and is therefore free and conscious of what makes or signs.