bram, and K. Yasue. “Quantum Optical Coherence in Cytoskeletal Microtubules: Implications for Brain Function.” Biosystems 32, no. 3 (1994): 195-209. Lahoz-Beltra, R., S. R. Hameroff, and J. E. Dayhoff. “Cytoskeletal Logic: A Model for Molecular Computation via Boolean Operations in Microtubules and Microtubule