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Co-authored-by: bthirion <bertrand.thirion@inria.fr>
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Remi-Gau and bthirion committed Oct 13, 2023
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2 changes: 1 addition & 1 deletion doc/glm/glm_intro.rst
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Expand Up @@ -33,7 +33,7 @@ One way to analyze times series consists in comparing them to a *model* built fr

One expects that a brain region involved in the processing of a certain type of event (e.g. the auditory cortex for sounds) would show a time course of activation that correlates with the time-diagram of these events. If the :term:`fMRI` signal directly showed neural activity and did not contain any noise, we could just look at it in various voxels and detect those that conform to the time-diagrams.

But we know from previous measurements that the :term:`BOLD` signal does not follow the exact time course of stimulus processing and the underlying neural activity. The BOLD response reflects changes in blood flow and concentrations in oxy-deoxy haemoglobin, all together forming a `haemodynamic response`_ which is sluggish and long-lasting, as can be seen in the following figure showing the response to an impulsive event (for example, an auditory click played to the participants).
But we know from previous measurements that the :term:`BOLD` signal does not follow the exact time course of stimulus processing and the underlying neural activity. The :term:`BOLD` response reflects changes in blood flow and concentrations in oxy-deoxy haemoglobin, all together forming a `haemodynamic response`_ which is sluggish and long-lasting, as can be seen in the following figure showing the response to an impulsive event (for example, an auditory click played to the participants).

.. figure:: ../images/spm_iHRF.png

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2 changes: 1 addition & 1 deletion doc/glm/second_level_model.rst
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Expand Up @@ -7,7 +7,7 @@ Second level models
.. topic:: **Page summary**

Second level models in Nilearn are used to perform group-level analyses on :term:`fMRI` data. Once individual
subjects have been processed in a common space (e.g. MNI, Talairach, or subject average), the data can
subjects have been processed in a common space (e.g. :term:`MNI`, Talairach, or subject average), the data can
be grouped and statistical tests performed to make broader inferences on :term:`fMRI` activity. Some common
second level models are one-sample (unpaired or paired) and two-sample t-tests.

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Expand Up @@ -24,7 +24,7 @@
was obtained.
* Another possibility, used here, is to project
the normalized :term:`fMRI` data to an MNI-coregistered mesh,
the normalized :term:`fMRI` data to an :term:`MNI`-coregistered mesh,
such as fsaverage.
The advantage of this second approach is that it makes it easy to run
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2 changes: 1 addition & 1 deletion nilearn/interfaces/bids/glm.py
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Expand Up @@ -17,7 +17,7 @@ def save_glm_to_bids(
out_dir=".",
prefix=None,
):
"""Save :term:`GLM` results to BIDS-like files.
"""Save :term:`GLM` results to :term:`BIDS`-like files.
.. versionadded:: 0.9.2
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