midbrain/pons dopamine amount Trait.ontology 2019-10-30T15:08:44Z caripark CMO:0003114 VT:0010867 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 this catecholamine neurotransmitter, derived from tyrosine and the precursor to norepinephrine and epinephrine. brain dopamine amount