Cellular components of the nervous system - brain perturbation that elucidate cognitive functions
13 important questions on Cellular components of the nervous system - brain perturbation that elucidate cognitive functions
Name the perturbation methods most commonly used in cognitive neuroscience
- Perturbation imposed by stroke, trauma or disease
- Pharmacological perturbation
- Perturbation by intracranial brain stimulation
- Perturbation by extracranial brain stimulation
- optogenetics
How where perturbations first accomplished
What are limitations of clinical-pathological correlation in humans
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What are the two approaches for linking cognitive functions and neural processes
- Brain is perturbed in some way and task performance on a set of cognitive tasks is measured
- neuromonitoring approach an experimenter manipulates a particular cognitive process in an experimental taks and measures the associated changes in brain activity.
What are the downsides of making surgical lesions in animals
Which two forms do the pharmacological studies in humans have taken two main forms
- Examine the influence of chronic drug use or abuse on cognitive processes.
- Administer drugs in a experimental setting
What is the difference between agonists and antagonists
- A agonists bind to and activate receptors in a manner similar to a neurotransmitter
- a antagonist is where a drugs bind to and blocks receptors
What is direct electrical stimulation
Name the two ways i which electrodes can be placed
- Transiently; duration of the surgery
- chronically; for a longer amount of time
What is Transcranial magnetic stimulation (TMS)
What is called when a series of TMS pulses are used to study cognitive processes
What are the the drawbacks of using TMS
- Affect a relatively large area, limiting anatomical resolution
- transcranial stimulation can be delivered effective to only relatively superficial brain regions
- concurrent stimulation of scalp and head muscles
What are the two types of stimulation
- Anodal (positive) stimulation is thought to increase the cortical excitability of the area being stimulated
- Cathodal stimulation is thought to decrease the excitability
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