“The brain has always been described by means of technological metaphors.” 
One of the first handlings of this idiom occurred in Aristotle’s Rhetoric and Poetics: “Metaphor is the transference of a name from the object to which it has a natural application…” (Aristotle, Poetics, 21). More recently, individuals such as I.A. Richards, Kenneth Burke, and Max Black have made consequential advances in the field of metaphorical criticism, enabling its use to aid heavily in ornamentation and decoration, as structuring principle and discovery and description of the truth.
According to Richards, all thought is metaphoric because when individuals attribute meaning, they are “simply seeing in one context an aspect similar to one [they] encountered in an earlier context.” Though the work of theorists including Michael Osborn and Robert L. Ivie, we have a better understanding of how language relates us to reality, and how we as humans constitute reality through our use of symbols. When we process symbols to better understand reality, we are often using the metaphor. Phenomenological anomalies become accessible to us through the development of a physical materialism that often comes to life via symbols. When we attribute names or symbols to these phenomena, we are using the metaphor.
Along with the above, a number of others have stressed the importance of the metaphor. Nietzsche argued that it is simply the way in which we encounter the world: “A nerve-stimulus, first transformed into percept! First metaphor! The percept again copied into a sound! Second metaphor! And each time he leaps completely out of one sphere right into the midst of an entirely different one.” In these viewpoints, metaphor occurs prior to and generates the discovery of ideas.
Foss explains a great example of this usage in Rhetorical Criticism: Exploration and Practice via the metaphor that “time is money.” By using terminology such as “I’ve invested a lot of time in someone,” “You need to budget your time” and “this gadget will save you time” we begin to equate time through a financial viewpoint; it now shares its level of worth with money. In metaphoric criticism, Max Black has developed an influential method known as interaction theory which juxtaposes two terms in the metaphor generally regarded to belong to two differing classes of experience. The first term is called the tenor, principal subject, or focus, while the second term is called the vehicle, secondary subject, or frame. For example, “The brain is a machine” is a metaphor for which brain is the tenor, and machine is the frame. The process from there then is to discriminate what traits are commonplace by the tenor and vehicle, and form a type of discerning argument. As the associated characteristics of the tenor and vehicle interact, some are accentuated while others are contained. As one goes through this progression of deconstructing tenor and vehicle of the metaphor, it becomes apparent that the metaphor serves an argumentative purpose: metaphor constitutes argument.
To choose a common metaphor and artifact to further describe this process, the human brain has been the target of metaphoric assignments for quite some time: mirror, projector, computer, economy. (Tabbi, 1998) Others have termed the brain central telephone exchange, machine, and even government. While some illustrations appear more accurate than others, there are those who feel as a society that we’ve sorely missed the mark. In Catherine Malabou’s innovative work What Should We Do with Our Brain? (2008) she issues the challenge of deconstructing what we’ve always thought of our brains, and bestows an even greater one: what should we use it for?
Malabou begins the work by repetitiously stating “Our brain is plastic, and we do not know it.” The concept of consciousness is paramount to her: she not only calls attention to the many cities at work neurologically, but the fact that we do not know it. From “know thyself” forward, awareness has been the crux of academic and technological progress. Malabou’s critique of our neuronal dogma is an attempt not only to break away from the ideological presuppositions the field of neuroscience currently includes, but a call to become conscious of them-and of ourselves.
The first method of metaphoric criticism we may employ includes simply dissecting the metaphor. How does it function? In which way is Malabou trying to shake the current opinion of its role? Previously (as mentioned above) common symbols used for the brain include computer, central telephone exchange and machine. However, with Malabou’s concept of plasticity, the rigidity of these allegories will no longer suffice. Machines, computers and central telephone exchanges have a control center; an unyielding and stiff method of prescribing action and processing information. Plasticity is rigidity’s direct anonym, and as we have seen that metaphor not only tells a story but constitutes an argument, new metaphors must come into play. Our brains are no longer known to be entirely genetically determined, static or even simply flexible. “Plasticity, in effect, is not flexibility. Let us not forget that plasticity is a mechanism for adapting, while flexibility is a mechanism for submitting.” We must ascertain a new meaning, and this is Malabou’s challenge. She must use a metaphoric criticism to tear down the current views and instill the new.
We have now seen how the tenor and vehicle of “brain as machine” will no longer suffice. Let’s take a look at what Malabou uses as alternative: brain as plastic. Taken from the Greek plassein, to mold, plasticity has two basic definitions: one is to receive form, and one is to give form. “Plasticity in the nervous system means an alteration in structure or function brought about by development, experience or injury.”Instead of mindlessly accumulating new metaphors for our brain, Malabou relies on the fact that we are the minds who make the metaphors, and sets out to explain just why the old metaphoric arguments won’t work. She offers perspective and a choice to the audience, just as Foss speaks of in Rhetorical Criticism, “If the audience finds the associated characteristics acceptable and sees the appropriateness of linking the two systems of characteristics, the audience accepts the argument.” In the context of modern day capitalism, Malabou creates a fantastic charge and call to consciousness, taking aide from European metaphysics, political engagement and neuroscience. By changing the terms (linguistically, semantically and literally) of the game, Malabou effectively provides a metaphoric critique to the prevailing comprehension of the function of the human brain.
In conclusion, a metaphoric criticism is best employed here simply because it is what the author employs herself. As Foss further states in Rhetorical Criticism, “Whatever metaphor is used to label and experience a phenomenon, then, suggests evaluations of it and appropriate behavior in response.” The old metaphors used suggest a worldview of a time passed, before the age of functional and real-time neurological imaging. The new formation of the model of our brain must be in line with the modern self: dynamic, transforming and revolutionary. We can no longer think of our brains, our neuronal selves, as but flexible and anonymous; as machine. We must affirm our capacity for change and confess our plasticity: evolutionary, adaptive, explosive. We must no longer consent to depression via disaffiliation; to be “blind to our own cinema.” Our brains tell us a story-whether we choose to listen or not. Karl Marx once stated “Humans make their own history, but they do not know that they make it.” As Malabou so eloquently proves throughout her work that a simple metaphor does not suffice and thus hinders a proper understanding for the plastic brain, she relies on concepts such as ecological, self-creating and emancipatory instead. Plasticity cannot be domesticated. The brain is ever-changing; so then must our conception of it be also.
“…At bottom, neuronal man has not known how to speak of himself. It is time to free his speech.”
 Foss, Sonja K. Rhetorical Criticism: Exploration and Practice, 2nd Ed. Prospect Heights: Waveland Press, 1996., p. 359
 Friedrich Nietzsche, “On Truth and Falsity in their Ultramoral Sense,” in The Complete Works of Friedrich Nietzsche, ed. Oscar Levy, trans. Maximilian A. Mugge, II. New York: Macmillan, 1911., p. 178
 Foss, Sonja K. Rhetorical Criticism: Exploration and Practice, 2nd Ed. Prospect Heights: Waveland Press, 1996., p. 361
 Marc Jeannerod, 2004.
 See the entry “Plasticity in the Nervous System,” in The Oxford Companion to the Mind, ed. Richard L. Gregory (Oxford: Oxford University Press, 1987), 623.