Autism Calcium Channelopathy Abnormalities in neurotransmitter systems have frequently been recorded in autism. Clinical observations include both elevated and lowered levels of various neurotransmitters compared to controls, including alterations in monoamine metabolism [3654486, 2653386, 3215884], neurotransmitter peptides [9018016, 9315980], with considerably raised levels of beta-endorphin (for vasopressin/oxytocin see Hormones) and altered activities of cholinergic receptors, […]