Neuroscience Flashcards
What are the advantages of using TMS?
Temporal resolution is in millisecond range
Study double dissociations:
Stimulate or temporarily disrupt different cortical regions during 1 task, 1 region during different tasks
Short duration of task minimises risk of plasticity
Virtual lesion in subject may be better defined than lesion in patient (allows for group studies)
What are the disadvantages of using TMS?
Spatial undersampling (only explore one area at a time)
Only cortical areas are accessible
Auditiory cortex stimulation is problematic (muscles),
loud coil noise click “sham stimulation”
What are Event-related potentials?
What are Event-related oscillations?
What are exogeneous ERP’s influenced by?
Influenced by intensity/ frequency of stimuli
This is highly important for neurological diagnosis
not so much for psychological research
How are endogenous ERP’s elicited?
Elicited by:
Infrequent occurring targets
Equally infrequent novelty, environmental sounds
During an actively attended novelty oddball task
Which brain technique has excellent temporal resolution (ms) but poor spatial resolution (inverse problem)?
EEG
Which brain technique has the same neural activity as EEG but better spatial resolution?
MEG
Which brain technique is necessary when ongoing EEG is noise
ERP
Which method is obtained through time-locked averaging to improve signal-to-noise ratio?
ERP’s
Exogenous vs endogenous ERP’s depend on what?
Depend on stimulus properties
vs interaction between subject and event
Which 3 brain measuring techniques show the activation at time of cognitive event, but they show it without telling us if the activation is essential?
EEG
ERP
MEG
