Cognitive neuroscience

What is cognitive neuroscience?

• The study of how brain structures & neural activity are linked to mental processes (e.g. thought, language, & memory)

• It examines how neurons communicate & how specific brain areas relate to cognitive functions (e.g. episodic memory is associated with the temporal & frontal lobes, particularly the right prefrontal cortex)

How is cognitive neuroscience studied?

• It is studied using neural imaging techniques that examine the biological basis of mental processes

• Common methods include PET & fMRI scans, which measure brain activity by tracking blood flow & metabolic changes

How do PET scans work?

• PET scans involve injecting a radioactive tracer into the bloodstream

• Increased blood flow to active brain areas is detected by the scanner, showing which regions are involved in specific cognitive tasks

How do fMRI scans work?

• fMRI measures brain activity by detecting changes in blood oxygen levels

• Participants complete tasks while the scanner records which brain areas are active

What does the case of Phineas Gage show about cognitive neuroscience?

Phineas Gage’s brain injury (i.e. damage to the left frontal lobe) led to personality & behavioural changes (e.g. increased aggression), demonstrating the link between the frontal lobe & behaviour

What did Tulving discover about memory & the brain?

Tulving used PET scans to show that episodic memories are linked to activity in the right prefrontal cortex, while semantic memories are linked to the left prefrontal cortex

What is the purpose of cognitive neuroscience?

To understand the biological basis of cognition & apply this knowledge to real-world issues, such as diagnosing & treating brain damage (e.g. strokes) & mental health conditions (e.g. OCD)

What are the advantages of cognitive neuroscience?

• It uses objective, scientific methods (e.g. fMRI, PET scans & EEG) to provide reliable data, which contributes to debates (e.g. nature-nurture debate)

• Research (e.g. Maguire et al.’s study of London taxi drivers) shows brain plasticity, supporting the role of experience in shaping the brain

What are the disadvantages of cognitive neuroscience?

• Ethical issues may arise (e.g. the use of fMRI for lie detection in court)

• There are concerns about the reliability, validity & whether it is ethical to use brain data in legal decisions

Discuss the emergence of cognitive neuroscience (16 marks)

Write your AO1 paragraph

• Cognitive neuroscience is the scientific study of how brain structures & neural activity are linked to mental processes (e.g. attention, perception & memory). It examines how neurons communicate through neural networks to produce complex functions & how certain brain structures are associated with specific functions (localisation of function), such as the hippocampus in the formation of new, long-term memories.

• Cognitive neuroscience also recognises distributed processing, where cognitive functions involve multiple brain regions working together, alongside neural plasticity (the brain’s ability to reorganise & adapt following experience or damage).

• Researchers use neuroimaging techniques (e.g. fMRI, PET scans & EEG) to measure brain activity & infer links between neural activation & cognitive processes. Overall, cognitive neuroscience has improved our understanding of how cognitive functions are represented in the brain (cognitive mapping) & has contributed to the development of fields, such as artificial intelligence.

Discuss the emergence of cognitive neuroscience (16 marks)

Write your strength AO3 PEEL (objective & quantifiable)

• Point: One strength of cognitive neuroscience is that it provides objective & quantifiable evidence of cognitive processes.

• Evidence: For example, fMRI measures brain activity by detecting changes in blood oxygenation while participants perform cognitive tasks.

• Explain: This produces precise, quantitative data about neural activation patterns, which reduces the reliance on subjective self-report methods, increasing the internal validity.

• Link: Therefore, cognitive neuroscience increases the credibility of psychology as a scientific discipline.

Discuss the emergence of cognitive neuroscience (16 marks)

Write your strength AO3 PEEL (HM)

• Point: One strength of cognitive neuroscience is that it identifies neural structures associated with specific cognitive functions.

• Evidence: For example, research shows the hippocampus is involved in the formation of new long-term memories, as supported by case study of HM.

• Explain: This improves our understanding of localisation of function by highlighting clear links between brain regions & cognitive processes.

• Link: Overall, cognitive neuroscience provides strong evidence for brain-behaviour relationships, increasing the validity of psychological explanations.

Discuss the emergence of cognitive neuroscience (16 marks)

Write your limitation AO3 PEEL (low ecological validity)

• Point: One limitation of cognitive neuroscience is that studies often have low ecological validity due to artificial experimental conditions.

• Evidence: For example, Tulving used highly controlled laboratory tasks, involving PET scans, where participants performed cognitive tasks that do not reflect real-world thinking or behaviour.

• Explain: This is problematic as cognitive processes in everyday life involve complex interactions between emotion, attention & environmental context, which are difficult to replicate in laboratory settings.

• Link: Therefore, the findings may not fully represent how cognition works in natural environments, limiting generalisability.