Good afternoon! You ask interesting and important questions. Thank you. When there is nocturnal enuresis in men, first of all, it is necessary to examine the area of the prostate gland. It is advisable to exclude prostatitis or a more severe pathology (neoplasm). Only after a professional examination and exclusion of the pathological process in the pelvic region can you raise your head in the literal sense and begin to analyze dysfunctions at the level of the brain. At the level of the brain also develop processes that affect the process of urination. Please see one of the examples in the manuscript in the Attachment. By the way, look also at the link to an interesting example of nocturnal incontinence associated with changing brain functions.
Not exactly a direct effect on amygdala, but Nocturnal enuresis should affect hypothalamus and pineal gland. Additionally, parasympathetic system should also be involved. Since amygdala is related to stress, psychological correlates might lead to involvement of amygdala as well.