I therefore go further, and propose that pattern recognition is a fundamental scientific principle to build a theoretical model of mind based on natural physical grounds. So that we can explain the mind main function as to process the recognized patterns, also with memorized patterns and instinctive patterns. I will try to convince you here that this is a theoretical modeling principle valuable enough to building a theory of human, animal or artificial mind. As patterns are recognized, memorized and processed by the mind, we can propose the concept of MENTAL PATTERN as the functional unity concept of the pattern recognition principle. The term MENTAL PATTERN encloses any pattern identifiable by any language, theory, process, mechanism, body, model, description, activity, etc. It may be a standard visual image, tactile sensation, chemical taste perception, perceived action, thought, concept, etc. I am proposing that all the humans and other animals mentally do is to process patterns. 

The biological basis of the concept of mental pattern used here is in agreement to the standard biophysical state view of the nervous system. It is well known that the nervous system of animals has activity when stimulated externally, or by physiological process even on thought and introspection (if human). At a bio-physical perspective I propose that there is a correlation between the endless possible bio-physical states of the nervous system with the endless real patterns that the mind can interact and recognize from the world included the patterns of its self functioning. This correlation process between the mental patterns and the world patterns is what could be called the mind representational framework. Thus a mental pattern (neural-physiological state) can be activated by a detected sensorial stimulus from an external (or self) physical pattern. A mental pattern may activate others mental patterns (or combination of patterns), and mental patterns may cause physiological reactions such as muscle movements, and even thinking and consciousness behavior. 

## 2 - Instinctive Mental Patterns

Some patterns such as hungry, pain, sleepiness, etc, are the basic mental patterns that are recognized and have a response from the brain since born or during any stage of our life. The modeling of these mental instinctive patterns is important because they can help to understand the possible descriptions of the learning process proposed below, and other characteristics such as animal and human desire, curiosity, the freedom of thought, free will, etc. Studies about the cognitive role of emotions, motivation and intuition are among current works3,4 supporting the relevance of instinctive mental patterns. 

Summarizing, the instinctive mental patterns may be important both as patterns that define the initial conditions of the mind and as the influence on behavior throughout life. Bio-physically, mental instinctive patterns may be associated with innate neural-physiological states in the brain structure or to some patterns of brain preferred responses that have the ability to be activated even without learning or prior memorization. 

## 3 - Mental Patterns Memorization

The brain has the mental capacity to record some patterns so that they are activated (recalled) more easily in the future processing. These patterns are stored as memory, and can be reactivated as a response or remembering. The memorization of external patterns in the brain is widely scientifically known and accepted since the experiments of Pavlov and Hebb to the modern experiments with memory. The memory bio-physical background can be modeled as an increase in the likelihood, frequency or the intensity of recognition or activation of a mental pattern related to an external physical pattern detection, or self functioning pattern detection. 

## 4 - Mental Patterns Activation (Dynamics Or Processing)

Recognition and memorization of patterns by the brain can be seen among the most important properties of what we can call the processing or dynamics of patterns, i.e., the brain has mechanisms to work with patterns in several ways. Other mechanisms of the brain activation patterns that I propose are: 

## - Repetition Of Mental Patterns (Automatic Activation)

- **Association of mental patterns** (an active mental pattern actives others mental patterns) 