tissue serotonin amount midbrain/pons serotonin amount 2019-10-30T14:52:55Z CMO:0003110 The proportion, quantity or volume in the midbrain (the middle of the three cerebral vesicles of the embryo or the corresponding part of the adult brain) and neighboring pons (between the medulla oblongata and the midbrain) of a monoamine neurotransmitter derived primarily from tryptophan. Trait.ontology VT:0010862 caripark brain serotonin amount