CSBBCS members can join the CPA as Section Associates for $85 (plus the section fee for Brain & Cognitive sciences of $12 for faculty and $5 for students). 

Click here for the membership page (and then scroll to bottom for Section Associate fees/category): https://cpa.ca/membership/becomeamemberofcpa/memberrates/

Click here for info on the CPA Brain & Cognitive sciences section: https://cpa.ca/sections/brainandcognitivescience/