# the Unit of the time course data from source\_estimate object

**URL:** <https://mne.discourse.group/t/the-unit-of-the-time-course-data-from-source-estimate-object/6137>\
**Category:** Support & Discussions\
**Created:** [January 3, 2023, 3:55am UTC](https://mne.discourse.group/t/the-unit-of-the-time-course-data-from-source-estimate-object/6137 "2023-01-03T03:55:33Z")\
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**Author:** ![richard](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/richard/32/15_2.png) [@richard](https://mne.discourse.group/u/richard)\
**Post date:** [January 3, 2023, 2:08pm UTC](https://mne.discourse.group/t/the-unit-of-the-time-course-data-from-source-estimate-object/6137/2 "2023-01-03T14:08:43Z")

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Hello, this question was answered before here:

> [@What is the unit for the source estimates returned by apply\_inverse\_epochs function for EEG data?](https://mne.discourse.group/t/what-is-the-unit-for-the-source-estimates-returned-by-apply-inverse-epochs-function-for-eeg-data/3829/2):
>
> Hello @dahaiyu and welcome to the forum! The dSPM and sLORETA algorithms produce source estimates in unit-less values (based on F-statistics). On the other hand, the MNE and eLORETA algorithms return the electrical current in Amperes (that’s why the numbers are so tiny!). It is therefore totally alright to label the y-axis in your above figure as “dSPM value”. Hope that helps! Richard

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