Meaning of 'neighborhood'

meaning of 'neighborhood'

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

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

This means that some of the analyses performed on sights may be the same as the analyses performed on sounds, and could be computed, at least in part, by similar kinds of circuitry. Inputs from an ear represent different frequencies; inputs from an eye represent spots at different locations. Neurons in the sensory cortex (both visual and auditory) receive information from a neighborhood of input fibers and extract simple patterns from them.

I'd like ask a question regarding the underlined 'neighborhood'.
In this context it doesn't seems to mean 'A district or area with distinctive characteristics'.
To me it seems to mean 'group' or 'number'.

Am I right?

(If not, can you suggest a proper meaning?)

Regards.