Preparation for Informal Chat Flashcards
Paper I read to him was called
Pattern of neural responses in face regions are predicted by low-level image properities (2018)
In 2018 Paper
neural models of face processing by Haxby et al showed that diiferent regions are involved in processing different info from face - what regions? (3)
- Occipital face area (OFA)
- Fusiform face area (FFA)
- Superior temporal sulcus (STS)
In 2018 Paper
connection from OFA and STS is to due with
dynamic changes in face (e.g., expression)
In 2018 paper
connection of OFA and FFA is to do with
invariant (not-changing) features of face (e.g., identity)
In 2018 paper
evidence supporting OFA, FFA, STS is important for high-level attributes (e.g., identity and expression)
but this paper wanted to investigate whether
low-level properities (e.g., viewpoint) can explain the topographical organisation of these face regions
In 2018, experiment 1 involved
3 different viewpoints of familiar celeb faces
In 2018, experiment 2 involved
3 different viewpoints of different unfamiliar identities with 3 expressions = happy, disgust, fear
What was the conclusion of the 2018 paper?
Face region not exclusively dealing with high-level attributes but low level as well (image representation)
in fMRI, more blood flow to the part of the brain that is
most active
in fMRI we can measure the BOLD signal which stands for … to measure - (2)
Blood 02 Level Dependent
changes in oxygenation
Whole region of the brain is decided up into vowels (units of 3D image of brian) which represent
groups of neurons and its gross energy
What happens in univarate analysis for an fMRI experiment if we expose participants to face stimuli?
- We measuring the BOLD signla at each vowel in fMRI experiment
- Design metrics of the experiment is x (e.g., time duration of [facial] stimuli) and y is the BOLD signal of a voxel
- Put through regression model and get beta value of each voxel (how much is relation between x and y [ e.g, voxel ha shigh beta value when seeing face)
What happens in MVPA? - (3)
- Not looking at one voxel at the time
- Looking at a pattern of activation in cluster of voxels
- You train a classifer and then validate (e.g,, check if it can classify identity given a pattern of voxel)
What does MVPA stand for?
Multivoxel Pattern Analysis
Due to the curvature of the retina, left visual field…
stimulate right eye etc..
The optic nerve spilts into 2 parts - (2)
temporal (travels along ipislateral - same side)
nasal (crosses to project on contralateral side
Neurons in right part of retina project to thr right
LGN and right V1
My experience:
advanced statistic course
Learned advanced statistics in R & SPSS like Poission /Logistic Regression, Meditation, Moderation, Tests of association
My experience:
Models of brain function
Learned computational neuroscience models and had MATLAB stimulations of them
My experience:
Final Dissertation Project - (6)
Prediction of SiN Performance Using Non-Speech Stimuli
SiN tests problem - only used in children
Recruited participants - did psychopsychic tests like PTA
The SFG consisted of a set of constant frequencies (figure) against a ‘background’ of random
frequency tones.
Did harmonic and dynamic version of SFG that resmebled speech more
Analysed data in R/MATLAB pearson correlational amalysis
Question is do i require any
training before assisting on any projects in your lab
I would love to take part in fMRI anlaysis specifically
such as univarate analysis as well as MVPA analysis and data collection
Completely fascinated by fMRI as I took part in a study
in university of iowa
Prefer fMRI than EEG as
it has better spatial resolution and knows what areas are active
Tell us about yourself - (3)
- Recently graduated from Newcastle University
- Where i acquired experience in conducting advanced statistical tests in R and SPSS, acquired RA experience as well as conducted my final dissertation project wirh Dr Griffiths on auditory perception
- Ever since learning about visual perception in undergrad as well as in neuroimagining of vision and taking part in fMRI, i am completely fascinated in gaining some experience in this field of research
