abnormal zinc homeostasis under "abnormal mineral homeostasis [MP:0005636]"
DEF: anomaly in the processes involved in the maintenance of an internal equilibrium of zinc that normally is a cofactor in many proteins
1. abnormal brain zinc level
DEF: any anomaly in the amount of zinc present in mammalian brain tissue, where 5–15% of total zinc is concentrated in synaptic vesicles in a subset of glutamatergic neurons; histochemically reactive zinc is present in many regions of the central nervous system and is especially abundant in the hippocampus
1a. decreased brain zinc level
DEF: reduction in the amount of zinc present in the brain tissue
SYN: reduced brain zinc level