33 Chakras -

S17–S21 (Cervical & Brainstem): Truth & communication micro-chakras (S17 = auditory listening, S18 = speech impulse, S19 = visual truth, S20 = intuition seed, S21 = brainstem/pons switch).

The final tier represents the path to or non-duality. 33 chakras

From T1 (Soma) to T5 (Logos), ending with resonance to the syllable “OM” for 33 seconds. S18 = speech impulse