I think the first big issue we should focus on to answer this question is about what does for you sensory perception or awareness mean and how it is related to schizophrenic. I mean, hallucinations in schizophrenic is related with a lot of events that occur in the brain, dopamine increase, failure of the regulation of the interneurons, grey matter volume decrease... but from a functional point of view, that sensory perception stems from from peripheral nerves and receptors and through bottom-up processes reach high-order brain structures.

So, we detect two big neural structures: peripheral system and high-order structures (cortex and basal ganglia). So you can enhance or heighten your sensory perception or awareness through to ways: (1) increase or empower the sensibility of your peripheral nervous system (so you will need a cognitive system to support all the data collected), or increase/empower your neural system that select and manipulate external information (sensory memory, attention and/or working memory). The dopamine is related with a lot of cognitive processes and even modulate the response of cognition to some events. Besides, it is related to the intensity through which you focus attention on some external events.

So, to answer your question and being orthodox, from my point of view, high levels of dopamine concentrations are going to distort your reality. You don´t have increased or empowered your sensory perception or awareness, on the contrary your brain is manipulating the information in the way it is creating a false illusion of reality that you can confuse as an magnification of your sensory or awareness perception.

Cheers!

Hello Mauricio,

I feel that your question still might lack clarity in what you really want to do. I am not sure if you are interested in dopamine and neurons or in heightened sensory perception. However I find your next reflection interesting

“My main doubt was that if an individual decides to decrease the exposure to this stimuli, would he experience a heightened awareness to his environment and therefore noticed improved cognition, attention, as well as possibly creativity and a sense of general enjoyment/wellbeing?” 

Here I am primarily replying to this new reflection/doubt of yours. 

 I am not sure if just giving up an old pattern is a sufficient condition to experience more creativity and heightened well being. In some meditation methods and some complementary healing methods like the one I mention below, somatic experiencing is one of the clues on how to let go of past traumatic events bringing with it an increase in energy and wellbeing. The meditation method I am researching known as Arka Dhyana or Intuitive Meditation is another way of  achieving increased creativity and well being through increased sensitive of our inner world of feeling.. Both these approaches I mention require  a change from awareness of the outer environment to awareness of the inner environment.  

“Somatic Experiencing® (SE), a form of trauma therapy that emphasizes guiding the client's attention to interoceptive, kinesthetic, and proprioceptive experience. SE™ claims that this style of inner attention, in addition to the use of kinesthetic and interoceptive imagery, can lead to the resolution of symptoms resulting from chronic and traumatic stress. This is accomplished through the completion of thwarted, biologically based, self-protective and defensive responses, and the discharge and regulation of excess autonomic arousal. We present this theory through a composite case study of SE treatment; based on this example, we offer a possible neurophysiological rationale for the mechanisms involved, including a theory of trauma and chronic stress as a functional dysregulation of the complex dynamical system formed by the subcortical autonomic, limbic, motor and arousal systems, which we term the core response network (CRN). We demonstrate how the methods of SE help restore functionality to the CRN, and we emphasize the importance of taking into account the instinctive, bodily based protective reactions when dealing with stress and trauma, as well as the effectiveness of using attention to interoceptive, proprioceptive and kinesthetic sensation as a therapeutic tool. Finally, we point out that SE and similar somatic approaches offer a supplement to cognitive and exposure therapies, and that mechanisms similar to those discussed in the paper may also be involved in the benefits of meditation and other somatic practices” (Peter Levine).