While some advanced concepts such as brain networks may not be explicitly required for the NBCOT exam, understanding them can provide a more comprehensive foundation for addressing complex clinical scenarios. The NBCOT exam focuses on the application of knowledge in occupational therapy practice, and having an understanding of how different brain networks influence behavior, cognition, and emotion can enhance your ability to create effective treatment plans and interventions.

Default Mode Network (DMN)

• Default Mode Network (DMN): A network of interacting brain regions that is active when a person is at rest and not focused on the external environment. It is involved in self-referential thoughts, such as daydreaming, recalling memories, and thinking about the future ¹ .
  • Key Regions:
    • Medial Prefrontal Cortex (mPFC): Involved in self-referential processing.
    • Posterior Cingulate Cortex (PCC): Linked with memory retrieval.
    • Inferior Parietal Lobule (IPL): Associated with attention and the integration of sensory information.

Central Executive Network (CEN)

• Central Executive Network (CEN): Engaged when a person is actively focusing on a task and requires working memory and decision-making. It is crucial for goal-directed behavior and problem-solving ² .
  • Key Regions:
    • Dorsolateral Prefrontal Cortex (DLPFC): Important for working memory and cognitive flexibility.
    • Posterior Parietal Cortex (PPC): Plays a role in attention and the integration of sensory information.

Salience Network (SN)

• Salience Network (SN): Detects and filters salient stimuli, and is involved in switching between the DMN and CEN. It helps prioritize attention and guide behavior towards the most relevant stimuli ³ .
  • Key Regions:
    • Anterior Insula (AI): Processes emotions and integrates autonomic information.
    • Anterior Cingulate Cortex (ACC): Involved in emotion regulation, decision-making, and error detection.

Mindfulness Network

• Mindfulness Network: A set of brain regions associated with mindfulness meditation practices. It enhances self-awareness, emotional regulation, and attention control ⁴ .
  • Key Regions:
    • Prefrontal Cortex: Improves attention and executive functions.
    • Anterior Cingulate Cortex: Increases emotional regulation and self-control.
    • Hippocampus: Associated with improved learning and memory, and emotional regulation.

Attention Networks

• Dorsal Attention Network (DAN): Involved in goal-directed, top-down control of attention, focusing on external stimuli and tasks ⁵ .
  • Key Regions:
    • Intraparietal Sulcus (IPS): Engages in the allocation of attention.
    • Frontal Eye Fields (FEF): Controls eye movements and attention shifts.
• Ventral Attention Network (VAN): Controls the bottom-up, stimulus-driven reorientation of attention, typically in response to unexpected or salient stimuli ⁶ .
  • Key Regions:
    • Temporoparietal Junction (TPJ): Involved in detecting salient stimuli.
    • Ventral Frontal Cortex (VFC): Engages in attention reorientation.

Social Brain Network

• Social Brain Network: Underlies social cognition, including understanding others’ intentions, emotions, and social interactions ⁷ .
  • Key Regions:
    • Medial Prefrontal Cortex (mPFC): Processes social information and self-referential thoughts.
    • Temporal Parietal Junction (TPJ): Involved in perspective-taking and understanding others’ intentions.
    • Amygdala: Processes emotions and social signals.

OT Applications for Practice

• Default Mode Network (DMN): Understanding the DMN can help in developing interventions for patients with conditions like depression or anxiety, where excessive rumination and self-referential thoughts are common ¹ .
• Central Executive Network (CEN): Enhancing the function of the CEN through cognitive training can improve executive functions in patients with ADHD or traumatic brain injury (TBI) ² .
• Salience Network (SN): Recognizing the role of the SN in attention can aid in developing strategies for patients with attention deficits or autism spectrum disorders (ASD) ³ .
• Mindfulness Network: Incorporating mindfulness-based interventions can improve emotional regulation and stress management in patients with chronic pain or anxiety disorders ⁴ .
• Attention Networks: Targeting attention networks through specific exercises can assist in rehabilitation for patients with attentional deficits post-stroke or TBI ^{5  6} .
• Social Brain Network: Interventions aimed at enhancing social cognition can benefit patients with social communication difficulties, such as those with ASD or schizophrenia ⁷ .

Bookmark

1. Buckner, R.L., Andrews-Hanna, J.R., & Schacter, D.L. (2008). The brain’s default network: Anatomy, function, and relevance to disease. Annals of the New York Academy of Sciences, 1124(1), 1-38. https://doi.org/10.1196/annals.1440.011[↩][↩]
2. Seeley, W.W., Menon, V., Schatzberg, A.F., Keller, J., Glover, G.H., Kenna, H., Reiss, A.L., & Greicius, M.D. (2007). Dissociable intrinsic connectivity networks for salience processing and executive control. Journal of Neuroscience, 27(9), 2349-2356. https://doi.org/10.1523/JNEUROSCI.5587-06.2007[↩][↩]
3. Menon, V. (2015). Salience network. In A.W. Toga (Ed.), Brain Mapping: An Encyclopedic Reference (pp. 597-611). Academic Press. https://doi.org/10.1016/B978-0-12-397025-1.00052-X[↩][↩]
4. Tang, Y.Y., Hölzel, B.K., & Posner, M.I. (2015). The neuroscience of mindfulness meditation. Nature Reviews Neuroscience, 16(4), 213-225. https://doi.org/10.1038/nrn3916[↩][↩]
5. Corbetta, M., & Shulman, G.L. (2002). Control of goal-directed and stimulus-driven attention in the brain. Nature Reviews Neuroscience, 3(3), 201-215. https://doi.org/10.1038/nrn755[↩][↩]
6. Corbetta, M., Patel, G., & Shulman, G.L. (2008). The reorienting system of the human brain: From environment to theory of mind. Neuron, 58(3), 306-324. https://doi.org/10.1016/j.neuron.2008.04.017[↩][↩]
7. Adolphs, R. (2009). The social brain: Neural basis of social knowledge. Annual Review of Psychology, 60, 693-716. https://doi.org/10.1146/annurev.psych.60.110707.163514[↩][↩]