The association areas are located in the:
spinal cord
brainstem
thalamus
limbic system
cerebral cortex

The association areas are located in the cerebral cortex

Explanation:

The four cortical cortex lobes are the point of the areas of association. The primary function of this association is to process and to amalgamate the various data from the different senses and relate it to the process of reasoning and thought.

It helps in producing a logical perception of the world and its experiences. Of these lobes, the frontal one is involved in organizing movements and actions as well as abstract way of thinking.

i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.