Which of the following was discussed in lecture about the developmental outcomes of preterm and low-birthweight infants, with reference to relevant brain regions?

Question

BlackTom AI · Accepted Answer

Executive functions are primarily mediated by the prefrontal cortex, so deficits in planning, working memory, inhibition, and cognitive flexibility in preterm or low-birthweight infants point directly to altered prefrontal development.

1) Relevant knowledge points and concepts
- Executive functions: set of higher-order cognitive processes (working memory, inhibitory control, cognitive flexibility, planning) essential for goal-directed behavior.
- Prefrontal cortex (PFC): brain region that supports executive functions and undergoes prolonged postnatal maturation, making it vulnerable to neonatal insults.
- Preterm/low-birthweight risks: hypoxia, inflammation, periventricular white matter injury, and disrupted synaptogenesis that preferentially affect late-developing regions like the PFC.

2) Step-by-step reasoning process
- Preterm birth interrupts in utero maturation, exposing the immature brain to extrauterine stressors.
- These insults commonly damage white matter and thalamocortical connections and alter cortical development, with notable effects in frontal regions because they develop later.
- Disrupted PFC structure and connectivity lead to measurable deficits in executive tasks (attention, working memory, inhibitory control) observed in follow-up studies of preterm/low-birthweight cohorts.
- Neuroimaging corroborates this: reduced PFC volume, altered frontal white-matter integrity, and atypical fronto-parietal network connectivity correlate with poorer executive performance.

3) Intermediate steps / evidence (no calculations required)
- Clinical observations: higher rates of ADHD, attentional problems, and executive dysfunction in preterm populations.
- Imaging studies: frontal cortical thinning, lower frontal gray matter and compromised frontal white-matter tracts.

4) Why the correct answer is correct
- Because both behavioral outcomes (executive deficits) and neuroanatomical findings (prefrontal alterations) were emphasized, the pairing “Executive function and prefrontal cortex” accurately captures the lecture’s focus.

5) Why other options are incorrect (brief)
- Emotion regulation and amygdala: emotion systems can be affected but lecture emphasized frontal executive outcomes rather than primary amygdala-driven emotion deficits.
- Pain and anterior cingulate: ACC relates to pain/affect but was not the central region/outcome discussed.
- Memory and hippocampus: hippocampal memory impairments are possible, yet the lecture highlighted executive/PFC issues as principal developmental outcomes.

6) Conclusion
This reasoning supports and confirms the correct answer: Executive function and prefrontal cortex.

Which of the following was discussed in lecture about the developmental outcomes of preterm and low-birthweight infants, with reference to relevant brain regions?单项选择题

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