Questions tagged [neuroimaging]

For questions about techniques to directly or indirectly image the structure, function, or pharmacology of the brain.

36 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
7
votes
0answers
169 views

Supplementary Motor Area or Juxtapositional Lobule Cortex

Harvard-Oxford Cortical Structural Atlas now calls the 'Supplementary Motor Area' the 'Juxtapositional Lobule Cortex (formerly Supplementary Motor Cortex)'. I've looked for papers that explain the ...
5
votes
0answers
121 views

Is there a tangible benefit of synchronising the sample clock to the laser pulses in a resonant scanning two-photon microscope?

NI data acquisition cards offer a possibility of synchronising data acquisition with the pulses of a 80 MHz Ti:Sapphire laser. This supposedly helps improve the signal to noise ratio, since the true ...
5
votes
0answers
30 views

Simultaneous DTI, structural MRI and 1H-MRS - Are there any examples of this?

I have been reading about recent articles relating to treatment resistant schizophrenia, and apparently there are a lack of studies using multimodal imaging. Initially I just thought that would be ...
5
votes
0answers
405 views

What are the brain regions related to tinnitus shown in this figure?

I am interested in learning about the neural mechanisms behind tinnitus, and was wondering if someone could help me to name the parts of the brain on this image that show increased activity in ...
4
votes
0answers
11 views

Do I report all anatomical regions in a large significant cluster identified in functional connectivity seed-to-voxel analysis?

I am conducting a resting-state functional connectivity seed-to-voxel analysis on the 25 participants from the NYC test-retest dataset using the CONN toolbox with the Posterior Cingulate Cortex of the ...
4
votes
0answers
30 views

Timing accuracy in presentation of videos with different frame rates (with COGENT)

For our fMRI study we want to present videos of 3 seconds duration. The videos have different frame rates: 48 videos were recorded with 50 fps 16 videos were recorded with 25fps 64 videos were ...
4
votes
0answers
43 views

Library (or manual creation) of ERP components

I'm looking to test some computational models using ERP components as inputs (eg. p300, n170) I'm wondering if there is an existing library anywhere that would have a bank of wave/component examples ...
4
votes
0answers
433 views

Steady State Topography and Advertising/Preference: Weaknesses? Criticism?

Steady-state topography is a derivation of EEG/ERPs using an evoked potential to an ongoing oscillating stimuli called the steady state visually evoked potential (SSVEP). Variations in the phase ...
3
votes
0answers
38 views

Can the administration of self-report measures of craving prompt participants with addiction to experience craving during the experiment?

My research focuses on measuring the neural correlates (through resting-state EEG) pre-post an improvisational music therapy session (MT sessions) in clients with substance misuse. One of my variable ...
3
votes
0answers
43 views

Relaxing your concepts in meditation

I am using the app Waking up from Sam Harris. A lot of his guided meditations tell you to perceive the world as the raw data of experience, instead of perceiving objects and concepts. To illustrate ...
3
votes
0answers
50 views

Task-based vs task-positive networks

Do the terms "task-positive network" and "task-based network" refer to the same thing, such as the Fronto-Parietal Control Network (FPCN), as distinct from the task-negative networks such as the ...
3
votes
0answers
89 views

NiftyReg reg_resample results in strange artifacts when registering MNI-ICBM-152 atlas

I'm using NiftyReg for image registration, and I have several artifacts when applying the warp from a non-linear registering of de facto standard MNI-ICBM-152 atlas. Here are a few slices showing the ...
2
votes
0answers
74 views

Opening an aparc+aseg.nii.gz file programmatically in Python

How do you programmatically in Python open and read segmentation data in an aparc+aseg.nii.gz file programmatically? Is this correct? ...
2
votes
1answer
32 views

Measuring postsynaptic potential vs action potential at axon hillock?

I have been reading literature regarding Neuronal potential measurement. Conventionally, researchers use electrode-based method to measure action potential. However, as it's of high invasiveness and ...
2
votes
0answers
63 views

Is synchronization between the MRI scanner and the stimulus presentation necessary for every trial?

I'm planning an event-related fMRI-experiment to investigate the difference in processing natural and computer-generated facial emotion expressions. I've seen a lot of studies that synchronize the ...
2
votes
0answers
35 views

Compute single patient Z-Scores from atlas anatomical zone

I have one brain image from a single patient. I have a set of normal pateints. Both, single patient and normal patients are normalised to an SPM template and the NMI space. I also have a brain atlas (...
2
votes
0answers
24 views

(Flavours of) Psychophysiological Interactions

The paper by Fischmeister et al. 2016 (Cortex) analysed fMRI task-related connectivity patterns, for two tasks that relied vs did not rely on recursive reasoning. Namely, they found "increased ...
2
votes
0answers
138 views

EEG electrode cluster selection

Is there a good review paper on electrode selection in EEG analysis to avoid the problem of double dipping (Kilner, 2013)? This is a well documented issue in neuroimaging (Kriegeskorte et al, 2009; ...
2
votes
0answers
286 views

Is there an equivalence table between the Desikan-Killiany atlas to brodmann areas?

FreeSurfer makes inferences about volume, through the calculation of the surface of the brain. The parametric method (used in SPM) is a voxel-based statistics. FreeSurfer analysis does not map the ...
2
votes
0answers
74 views

Brain structures related to risk-taking behavior

I did a preliminary research on brain structures in which activity might underlie risk-taking behavior. I came to two research that described right prefrontal cortex (Knoch et al., 2006), or ...
1
vote
0answers
15 views

Is there any maping between the AAL to Brodmann areas (BA)?

I am trying to find any correspondence between BA6 (Premotor cortex) and AAL, but there are no information about it. Is there any equivalence table for Brodmann areas and other related anatomic labels?...
1
vote
0answers
24 views

Has anyone tried using functional near-infrared spectropathy to quantitively measure sodium concentrations in the brain?

Functional near-infrared spectropathy "fNIRS", is a biophysics/medical technique that uses the near-infrared part of the electromagnetic spectrum (around 680nm to 810nm in wavelength) to ...
1
vote
0answers
17 views

Choice of reference/mid-slice during SPM slice-timing-correction

I'm trying to figure out the simultaneous-multi-slice (SMS) factor for my MR acquisition, to use during slice-timing correction, in SPM12. The DICOM header obtained during conversion (with the ...
1
vote
0answers
20 views

How well is biofeedback understood?

From an answer to the question Research suggesting conscious control over brain region activation? I have learned: »[S]ubjects become better at up-regulating or down-regulating activation in ...
1
vote
0answers
111 views

Noise ceiling estimate is lower than model prediction in RSA?

I am using representational similarity analyses (RSA) to compare models to some fMRI data. As part of this analysis I have computed noise ceilings for each of my regions of interest (ROIs). What's ...
1
vote
0answers
26 views

Active Sources Extraction

I am using the LORETA-KEY software for source localization, which gives as an output the current density of each voxel. No voxel has zero current density, so which method should be used to decide the ...
1
vote
0answers
15 views

What methods exist for converting channel-wise directed (effective) connectiviy estimates to ROI-wise connectivity estimates?

I am reading up on directed connectivity estimates (e.g. Granger causality, DTF, dDTF) in an attempt to find a method that allows me to appropriately convert channel-wise connectivity estimates into ...
1
vote
0answers
21 views

Has there been any substantive neuroimaging done to study Gendler's belief/alief distinction?

Tamar Gendler proposed a distinction between the concept of "belief" and "alief", "belief" being the more commonly held, intuitive conception of a certain type of propositional attitude and "alief" ...
1
vote
0answers
25 views

Does MEG measure the sum of neural activity or the maximum?

According to Wikipedia, neurons give a response that generates a readable MEG signal when they are firing in a relatively synchronized manner and their current carrying dendrites/axons are all aligned....
1
vote
0answers
46 views

How to cope with the problem of noise in fMRI?

The sounds and noises that a typical MRI scanner produces are problematic for several reasons: they give - annoying as they are - a strong feel of uncomfortableness to any subject or patient they are ...
1
vote
0answers
30 views

How does processing of T1 images affect tractography after registering the DWI to T1?

At the moment I believe that registering (aligning) Diffusion Weighted Images (DWI) to T1 images only allows for the DWI to have a parcellation basis, and otherwise it does not give much information. ...
0
votes
1answer
10 views

“runs” or “sessions” in Structural MRI - Purpose and Implications for Quality Control

I am working on a graduate research project using the ABIDE I and II autism datasets. MRIQC has been run on these data - and I now must remove participants marked as outliers on 3 specific quality ...
0
votes
0answers
7 views

What's the proposed mechanism of action of Trigeminal Nerve Stimulation (TNS) for ADHD? (And is there some neuroimaging in support of it?)

Last year the FDA approved the first medical device for ADHD, a Trigeminal Nerve Stimulator, a sort "pacemaker" that is used every night on the head of the patient. I'm trying find what's ...
0
votes
0answers
8 views

What is the best spatial resolution obtained with MEG? How does it compare to EEG?

The resolution can come from combination with other methods. (A 'mathematical' combination, not measuring multiple signals types and then reporting the spatial resolution of for example the fMRI ...
0
votes
0answers
13 views

Surgical implications of a fallacy in infering histology and morphology through a 1.5 Tesla MRI of a brainstem tumor

What would the surgical implications of a fallacy in infering histology and morphology of a brainstem tumour be? I am interested mainly in the sequelae in the sensory, motor and cognitive functions. ...
0
votes
0answers
20 views

Functional neuronal units that occupy the same brain region

[Thanks to Bryan Krause's advice, I edited the question.] Definition: Let two functional units be two sets of neurons, A and B, such that the probability of being connected (synaptically or by ...