A question regarding post-modification

a question regarding post-modification

The passage below is from ‘the Blank Slate’ by Steven Pinker.

http://evolbiol.ru/blankslate/blankslate.htm

Amazingly, a substantial proportion of people who were born with a limb missing experience these apparitions as well. They can describe the anatomy of their phantom limb (for example, how many toes they feel in a nonexistent foot) and may even feel that they are gesturing with their phantom hands during conversation. One girl solved arithmetic problems by counting on her phantom fingers! The psychologist Ronald Melzack, who documented many of these cases, proposed that the brain contains an innate “neuromatrix,” distributed across several cortical and subcortical regions, dedicated to representing the body.

I'd like to ask a question concerning the two underlined words.
These two words seems to modify 'an innate neuromatrix'.
But 'dedicated' seems to have a possibility that it modifies 'several cortical and subcortical regions'.
Here's my question.
In a sense of context the two words seems to modify the same word.
(Am I right?)

In that case should we not add 'and' before 'dedicated'?

This idea led me to the possibility that 'dedicated' can modify 'several cortical and subcortical regions'.

Hope for your replies.

Regards.