The claustrum is a narrow subcortical brain structure that resides between the striatum and insular cortex. The function of the claustrum is not fully described. and while our previous work supports a role for the claustrum in top-down cognitive control of action. other evidence suggests the claustrum may be involved in detecting salient changes in the external environment. https://www.parisnaturalfoodes.shop/product-category/cal-citrate/