NH_3
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Questions and Answers

What is the main focus of early models of cognitive functions mentioned in the text?

  • Top-down analysis and cognitive functioning
  • Bottom-up analysis and neural implementation
  • Top-down analysis and neural implementation (correct)
  • Bottom-up analysis and cognitive functioning

Which neuroimaging techniques emerged in the 1980s and 1990s, as per the text?

  • PET and fMRI (correct)
  • MRI and Ultrasound
  • CT scans and X-rays
  • EEG and MEG

What is one of the earliest methods of studying functional specialization mentioned in the text?

  • Genetic testing
  • FMRI scans
  • Single-cell recordings
  • Lesion studies (correct)

What is emphasized about the different regions of the cerebral cortex as mentioned in the text?

<p>Types of cell populations and their density (B)</p> Signup and view all the answers

Who identified 52 different cortical regions in 1909 using staining techniques?

<p>Korbinian Brodmann (D)</p> Signup and view all the answers

What was the impact of frontal lobe damage on Phineas Gage according to the text?

<p>Recovery to a large extent (C)</p> Signup and view all the answers

What is the purpose of electroconvulsive therapy (ECT) in the context of major depression?

<p>Stimulating neurogenesis and new synaptic connections in the hippocampus and amygdala (A)</p> Signup and view all the answers

What distinguishes deep brain stimulation from electroconvulsive therapy (ECT) in treating depression?

<p>Sends electrical impulses through implanted electrodes to specific brain targets (C)</p> Signup and view all the answers

How does optogenetics differ from both transcranial direct current stimulation (tDCS) and deep brain stimulation in terms of neuronal activation?

<p>Activates neurons using specific wavelengths of light (D)</p> Signup and view all the answers

What is a potential disadvantage of prolonged and excessive use of electroconvulsive therapy (ECT) for treating depression?

<p>Brain damage leading to long-lasting memory impairments (B)</p> Signup and view all the answers

In the context of optogenetics, what role do opsin genes play in neuronal activation?

<p>Control whether a neuron fires or not (D)</p> Signup and view all the answers

What advantage does transcranial direct current stimulation (tDCS) have over electroconvulsive therapy (ECT) in treating depression?

<p>Safer application method (B)</p> Signup and view all the answers

What is a voxel?

<p>A three-dimensional version of a pixel (A)</p> Signup and view all the answers

Which neuroimaging technique is better for providing information about the precise sequence of events as information is processed?

<p>EEG (C)</p> Signup and view all the answers

Why is it often necessary to increase the voxel size in neuroimaging?

<p>To capture small fluctuations in the BOLD signal (C)</p> Signup and view all the answers

What is one potential application of optogenetics mentioned in the text?

<p>Treatment of depression (D)</p> Signup and view all the answers

Which combination of techniques can help develop models of effective connectivity according to the text?

<p>Neuroimaging and EEG (A)</p> Signup and view all the answers

What issue arises when data are being normalized in neuroimaging?

<p>Differences in brain structure across participants (A)</p> Signup and view all the answers

Which brain area is responsible for memory and places, according to the text?

<p>Parahippocampus (A)</p> Signup and view all the answers

What does the BOLD signal measure in fMRI?

<p>Blood flow and cognitive activity (A)</p> Signup and view all the answers

Which technique uses magnetic fields and radio waves to produce images showing brain activity?

<p>fMRI (C)</p> Signup and view all the answers

What does rTMS stand for in the context of brain stimulation techniques?

<p>Repetitive Transcranial Magnetic Stimulation (C)</p> Signup and view all the answers

Which brain area is targeted with rTMS to reduce symptoms of depression?

<p>Right dorsolateral prefrontal cortex (D)</p> Signup and view all the answers

What is the function of the Knife-Edge Scanning Microscope (KESM) in brain research?

<p>Digitizing brain tissue for 3-D reconstruction (A)</p> Signup and view all the answers

How does the radioactive isotope used in studies decay?

<p>Into a nonradioactive atom after about a minute (B)</p> Signup and view all the answers

What is the difference between oxygenated and deoxygenated blood known as in fMRI?

<p><strong>BOLD contrast</strong> (A)</p> Signup and view all the answers

What is the primary function of Single cell recordings?

<p>To identify neurons that respond to specific stimuli (A)</p> Signup and view all the answers

Which type of brain wave is primarily associated with a state of arousal or alertness?

<p>Beta (C)</p> Signup and view all the answers

What distinguishes MEG (magnetoencephalography) from EEG in terms of spatial resolution?

<p>MEG is less susceptible to distortions from skull compared to EEG (A)</p> Signup and view all the answers

What kind of brain activity does an ERP measure?

<p>Response related to specific stimuli (B)</p> Signup and view all the answers

Which neuroimaging technique involves combining x-ray photographs from different angles into a composite representation?

<p>CT Scan (B)</p> Signup and view all the answers

When is the Theta wave predominantly observed?

<p>During deep meditation, hynagogic state, creativity, and memory retrieval (D)</p> Signup and view all the answers

What is the distinctive feature of Gamma waves among other types of brain waves?

<p>Thought to signal active exchange of information between brain areas (C)</p> Signup and view all the answers

Which neuroimaging technique is primarily used in medical diagnosis due to its ability to measure brain activity?

<p><strong>PET</strong> (positron emission tomography) Scan (A)</p> Signup and view all the answers

What does network neuroscience primarily focus on?

<p>Understanding how different brain regions work together (A)</p> Signup and view all the answers

How does network research differ from traditional localizationist research?

<p>It can be conducted when individuals are not engaged in any task (B)</p> Signup and view all the answers

Why is the network approach well-suited for understanding schizophrenia?

<p>It reveals the dense connectivity between different brain regions (C)</p> Signup and view all the answers

What is one important application of network neuroscience mentioned in the text?

<p>Identifying PTSD patients unlikely to respond to psychotherapy (D)</p> Signup and view all the answers

How might scientists achieve similar results to deep brain stimulation without surgery according to the text?

<p>By using multiple electrodes or stimulation sites (C)</p> Signup and view all the answers

How can clinicians access regions buried deep in the brain, like those targeted in DBS treatments for Parkinson's?

<p>By targeting areas closer to the brain surface (A)</p> Signup and view all the answers

What is the purpose of using tract tracing to explore anatomical connectivity?

<p>To identify where the cell projects to (D)</p> Signup and view all the answers

What is a major limitation of anatomical wiring diagrams developed through tract tracing?

<p>They do not provide information about the direction of information flow between neural regions (B)</p> Signup and view all the answers

What is the primary purpose of diffusion tractography in studying human anatomical connectivity?

<p>To explore anatomical connectivity in living humans (B)</p> Signup and view all the answers

What generates the electrical impulse known as an action potential?

<p>Opening of sodium channels leading to sodium influx into the cell (B)</p> Signup and view all the answers

What effect does the entry of positively charged ions have on the membrane potential during an action potential?

<p>It reverses the membrane potential, making the inside positive (A)</p> Signup and view all the answers

What is the significance of sodium-potassium pumps in neuron function?

<p>They regulate the resting membrane potential after an action potential (B)</p> Signup and view all the answers

In what way do neurons represent intensity according to the text?

<p>By their rate of firing (C)</p> Signup and view all the answers

Why are anatomical wiring diagrams not ideal for studying cognitive functioning?

<p>They do not consider information flow direction between neural regions (D)</p> Signup and view all the answers

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