Consciousness seems to influence the Q mechanical field. It causes the collapse of the wave function if you will however at the same time the brain is made up of matter and thus depends on QM functions of particles. As you said Since the brain is made of matter, and matter is made of particles which obey quantum mechanical laws they are connected. However much of what QM says is that the very view of the external world is an illusion, it only exists as we think it does (as a 3-D cartesian coordinate system of space and time) when we are observing it...otherwise it is information, fields of information or matrixes.
I think of reality as a computer screen. Say you pull up a website on your screen. It looks a certain way while you are interacting with it, but as soon as you click a link the website goes away. How does it exist when it is not on the screen. It exists but as information.. it is not the 2-d state that you saw when you it was on the screen. So the screen is like the observer. We can interact and change the state of this information when we interact with it (when it is on the screen) the system stores this information.. but it is not a true external cartesian coordinate system of space and time... it is just information.
There are many differences b/w the way the brain functions and a computer. They are very different. Consciousness is a unique attribute of the brain. The state of consciousness is dependent on the state of the brain and consciousness is further able to influence the state of the brain. It is very possible QM process are involved in these activities. Some people misunderstand the relationship and say you can not explain one mystery with another however there is much more to the relationship than that... Electrons are moved around the brain and may under go tunneling this may be involved in distant communications and synchronization. Most scientists even misunderstand QM. It is difficult to grasp conceptually.. although there are several great books on the subject I recommend reading several of them for diff views (Quantum Enigma, The dancing Wu Li masters, The Tao of Physics... ). Stay away from the math however as the math is even harder as there is no way to picture it or explain it it is the way it is...