Well, you don't obviously believe in the concept of a spirit, so yes, that would seem absurd to you. Besides the reception/transmission sites could consist of just a handful of cells, or, several cells could share the function at several sites and multitask. Who knows. The brain is incredibly complex, and 4 dimensional.
The brain is the hardware, the spirit the software. Big deal- a spirit is just a piece of living software-- nothing unbelievable about it- just another piece of technology. Highly advanced, but still just a form of machine/device.
bildabare, could you address one of the questions I asked in my initial post: "What physical interaction mediates this transmission and reception?" I presume you're not suggesting that there is a non-physical, spiritual transfer of information taking place, whatever that might mean. By 'physical interaction' I'm referring to what are usually called 'forces', e.g., electromagnetism or gravitation or the weak nuclear force or the strong nuclear force.
What a sad outlook.