PhpStorm Terminal doesn't recognize certain commands (nodejs, npm etc) ? Follow

Hi all,
I'm trying to make npm (https://npmjs.org/) and certain aspects of it work in the Terminal but I'm getting a command not found issue.
npm command is perfectly accessible via the MacOS terminal, and so are two other packages I've installed: jamjs and bower.

Out of the three commands: npm, jam and bower, only bower seems to be accessible via the PhpStorm terminal.

For reference, this is how I installed npm: https://gist.github.com/isaacs/579814 (first snippet) and bower and jam were installed with:

npm install -g bower
npm install -g jamjs

both from the MacOS terminal. PhpStorm finds the bower command but not jam or npm.
Anyone can understand what I'm missing?