# Comparing connection strength between brain regions (mouse)

**URL:** <https://community.brain-map.org/t/comparing-connection-strength-between-brain-regions-mouse/1278>\
**Category:** Technical\
**Tags:** atlas-mouse-brain-adult\
**Created:** [September 15, 2021, 8:05pm UTC](https://community.brain-map.org/t/comparing-connection-strength-between-brain-regions-mouse/1278 "2021-09-15T20:05:16Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![krishnizzle](https://avatars.discourse-cdn.com/v4/letter/k/8e8cbc/32.png) [@krishnizzle](https://community.brain-map.org/u/krishnizzle)\
**Post date:** [September 15, 2021, 8:05pm UTC](https://community.brain-map.org/t/comparing-connection-strength-between-brain-regions-mouse/1278/1 "2021-09-15T20:05:16Z")

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Hi,  
I would like to compare the density of projections between different brain regions, say for example parietal cortex to frontal cortex vs parietal cortex to prefrontal cortex. How can I do this using the connectivity atlas? I am a little lost.  
Thanks

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**Author:** ![wayne](https://yyz1.discourse-cdn.com/flex027/user_avatar/community.brain-map.org/wayne/32/16_2.png) [@wayne](https://community.brain-map.org/u/wayne)\
**Post date:** [September 16, 2021, 4:35pm UTC](https://community.brain-map.org/t/comparing-connection-strength-between-brain-regions-mouse/1278/2 "2021-09-16T16:35:13Z")

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Hi @krishnizzle

The [Connectivity Atlas](http://connectivity.brain-map.org/) contains a “Target Search” function that should allow you to find individual experiments that connect between the selected “Source Structure(s)” and “Target Structure(s)”.

Each experiment listed in the results displays a target volume value which is the volume of signal in the target structure measured in cubic mm. You can also click in to each result experiment to get a summary of projection for all brain targets.