Impact of Institutional Care on HPA Axis
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Questions and Answers

What effect does institutional care during infancy have on the HPA axis?

  • It has no effect on the responsiveness to psychosocial stressors.
  • It causes a fluctuation in the responsiveness
  • It impairs the responsiveness to psychosocial stressors. (correct)
  • It enhances the responsiveness to psychosocial stressors.

What is the Trier social stress test used for in the study?

  • To assess the level of perceived support.
  • To measure cortisol reactivity. (correct)
  • To measure changes in pubertal stage.
  • To determine between-individual differences.

What did the linear mixed-effects model control for?

  • Sex and between-individual differences in pubertal stage. (correct)
  • Only sex.
  • Only between-individual differences.
  • Stress reactivity levels

According to the study, what is associated with within-individual increases in pubertal stage for postinstitutionalized youth?

<p>Increases in cortisol stress reactivity. (D)</p> Signup and view all the answers

What does the study suggest about the peripubertal period?

<p>It is a time when the caregiving environment has a substantial impact on the HPA axis. (B)</p> Signup and view all the answers

What is the cortisol awakening response (CAR)?

<p>It's a measurement of cortisol levels upon waking. (C)</p> Signup and view all the answers

According to Romeo's argument, what is significant about the peripubertal period?

<p>Stressors during this period have longer-term impacts on the HPA axis. (B)</p> Signup and view all the answers

What do the cross-sectional studies indicate about the CAR for children with early life stress at later pubertal stages?

<p>An increased CAR, more similar to those without adverse care. (B)</p> Signup and view all the answers

What was calculated to model between-individual differences in pubertal stage?

<p>Each individual’s mean pubertal stage across all sessions (B)</p> Signup and view all the answers

How was within-individual change in pubertal stage calculated?

<p>The difference from an individual’s mean at each session (B)</p> Signup and view all the answers

What does the HPA axis appear to do post-adoption?

<p>Appear relatively blunted (C)</p> Signup and view all the answers

What is the likely reason for the HPA axis recalibrating prior to the reproductive period?

<p>To match conditions likely to be present during that life stage (B)</p> Signup and view all the answers

What is suggested to allow a 'disproportionately large influence' on HPA axis function?

<p>Global changes in neural plasticity (B)</p> Signup and view all the answers

What factor was explored as a possible modifier of the pubertal stress recalibration effect?

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

Which of the following best describes how puberty impacts HPA axis functioning?

<p>Increases differences between males and females (A)</p> Signup and view all the answers

What was specifically stated to be 'unlikely' to be responsible for driving recalibration?

<p>The activity of any individual hormone (C)</p> Signup and view all the answers

What does 'longitudinal change in pubertal score' refer to in the provided study?

<p>The change in pubertal stage for each individual. (A)</p> Signup and view all the answers

What is the 'mean pubertal stage' used to model in the study?

<p>Each participant's average pubertal stage across all sessions. (A)</p> Signup and view all the answers

What does the study investigate by moderating pubertal stage variables by group (PI vs NA)?

<p>Whether the relationship between changes in pubertal stage and cortisol reactivity differs between groups. (C)</p> Signup and view all the answers

What is the focal predictor in the study's statistical models?

<p>The quadratic time by pubertal change by group moderation term. (C)</p> Signup and view all the answers

Why does the study control for sex and sex interactions?

<p>To account for the potential influence of sex on the measured outcomes. (A)</p> Signup and view all the answers

What is a possible benefit of recalibrating the HPA axis during puberty?

<p>It could promote resilience and reduce the risk of mental health symptoms. (C)</p> Signup and view all the answers

What does the text suggest regarding the timing of interventions to improve children's environments?

<p>Interventions focusing on supportive environments should emphasize the peripubertal phase. (A)</p> Signup and view all the answers

What type of data is available on GitHub, according to the text?

<p>The anonymized data that was used in this study is available (A)</p> Signup and view all the answers

What was the age range of the participants at the start of the study?

<p>7 to 15 years (D)</p> Signup and view all the answers

How many participants were identified as previously institutionalized (PI) in the study?

<p>129 (A)</p> Signup and view all the answers

What is the mean age at which the PI youth were adopted?

<p>19.43 months (C)</p> Signup and view all the answers

Approximately what percentage of their pre-adoptive life did PI youth spend in the institution?

<p>95% (C)</p> Signup and view all the answers

What was the primary goal of matching PI and NA families?

<p>Matching Socioeconomic Status (C)</p> Signup and view all the answers

Which of the following was NOT listed as a source of funding for this study?

<p>National Institute of Aging (C)</p> Signup and view all the answers

Who was responsible for Tanner staging in this study?

<p>Janet Goodwalt, Terri Jones, and Melissa Stoll (B)</p> Signup and view all the answers

Which of these is NOT mentioned as a thank you in the acknowledgements?

<p>The local school district (B)</p> Signup and view all the answers

Which hormone is most closely associated with the studies of stress responsivity and hypothalamic-pituitary-adrenal (HPA) axis regulation?

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

What is a notable period that seems to have significant impact on developmental plasticity and stress responsivity?

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

What does the term 'hypocortisolism' refer to?

<p>Lower than normal levels of cortisol. (A)</p> Signup and view all the answers

What is a specific developmental process that glucocorticoids, like cortisol, regulate?

<p>The development of dendritic spines. (D)</p> Signup and view all the answers

What impact can early-life stress have on an adult's diurnal cortisol pattern?

<p>It has both dual impacts and concurrent impacts on the cortisol levels. (A)</p> Signup and view all the answers

Which of the following best describes the 'adaptive calibration model'?

<p>A model that describes how an organism's stress response adapts to its environment. (D)</p> Signup and view all the answers

What is the relationship between parenting behaviors and child behavior as it is assessed in a particular study mentioned?

<p>There is a bidirectional relationship between them. (C)</p> Signup and view all the answers

According to a study mentioned, what are some of the impacts that severe institutional deprivation in childhood can have on adult adoptees?

<p>A disruption in the normal rhythm of cortisol levels. (D)</p> Signup and view all the answers

What was the primary focus of the study?

<p>How pubertal stage influences cortisol reactivity in children and adolescents. (D)</p> Signup and view all the answers

What does TSST-C stand for, in the context of the study?

<p>Trier Social Stress Test- Children version (A)</p> Signup and view all the answers

Which group showed increased cortisol reactivity with increasing pubertal stage?

<p>Postinstitutionalized youth. (A)</p> Signup and view all the answers

What statistical method was primarily used to analyze the data?

<p>Linear mixed-effects model (A)</p> Signup and view all the answers

According to the study, how was the cortisol response measured?

<p>Salivary samples. (C)</p> Signup and view all the answers

What previous research or models does this study corroborate?

<p>Nonhuman animal models and cross-sectional human studies. (D)</p> Signup and view all the answers

How was pubertal status assessed in this study?

<p>Via self-reported questionnaires. (A)</p> Signup and view all the answers

When were the majority of the postinstitutionalized youth adopted?

<p>By age 2. (C)</p> Signup and view all the answers

Flashcards

Cortisol

The hormone released in response to stress, measured through saliva samples.

TSST-C (Trier Social Stress Test for Children)

A test used to measure an individual's stress response through physiological changes.

Puberty

The period of physical and hormonal changes that lead to sexual maturity.

Institutionalized

A state of being raised in an orphanage or other institution, without consistent, nurturing caregivers.

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Stress Reactivity

The ability of the body to respond to stress, involving the release of cortisol and other hormones.

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Cortisol Recovery

The process of adjusting to stress and returning to a normal physiological state.

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Within-individual Changes

Changes in the levels of a certain characteristic over time within a single individual.

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Linear Mixed-Effects Model

A statistical method used to analyze data with a hierarchical structure, like repeated measurements on the same individual.

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What is the HPA axis?

The hypothalamic-pituitary-adrenal (HPA) axis is a complex system that regulates the body's response to stress. It involves the hypothalamus, pituitary gland, and adrenal glands, and plays a crucial role in releasing hormones like cortisol, which helps the body cope with stress.

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What is puberty?

Puberty is a period of rapid physical and hormonal changes in adolescence. It is associated with the development of secondary sexual characteristics and the ability to reproduce.

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What does recalibration mean?

Recalibration refers to the process of adjusting or fine-tuning a system to improve its functionality or accuracy. This can involve resetting or readjusting the system's parameters or response thresholds.

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What is early life stress?

Early life stress refers to adverse experiences that occur during infancy and childhood, such as neglect, abuse, or trauma. These experiences can have significant impacts on a child's development and well-being, including their stress response system.

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What is institutional care?

Institutional care refers to the care provided in institutions like orphanages or foster homes. These settings often lack the consistent and nurturing care that is vital for children's healthy development, leading to potential mental and physical health challenges.

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How does institutional care affect the HPA axis?

Institutional care during infancy can disrupt the healthy development of the HPA axis, making it more sensitive to stress. This can lead to long-term consequences for mental and physical health.

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Can the HPA axis recalibrate during puberty?

Puberty may offer a window of opportunity for the HPA axis to recalibrate and adapt to changes in the environment. This may allow individuals to recover from early life stress and improve their stress response.

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How does the HPA axis respond during puberty for those with early life stress?

Studies have shown that individuals who experienced early life stress and were raised in institutional care may show blunted cortisol awakening response (CAR) during early puberty. However, their CAR may increase during later stages of puberty, becoming more similar to that of individuals who did not experience early life stress.

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Pubertal HPA axis recalibration

The process of adjusting the HPA axis (stress response system) during puberty to align with the anticipated demands of adulthood.

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Cortisol reactivity

A measure of how strongly an individual's cortisol levels change in response to a specific stressor or event.

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Mean pubertal stage

The overall average pubertal stage of an individual, calculated across all data points.

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Within-individual pubertal change

The difference in pubertal stage from an individual's mean stage at each specific time point.

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Puberty as a window of plasticity

The theory that hormonal shifts during puberty potentially make the HPA axis more sensitive to environmental influences, particularly the caregiving environment.

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HPA axis

The stress response system, involving the hypothalamus, pituitary gland, and adrenal glands.

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Neural plasticity

Changes in brain structure and function that occur during puberty, making the brain more adaptable.

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Postinstitutionalized Individuals

Individuals who were raised in orphanages or other institutions during early childhood, lacking consistent and nurturing caregivers.

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Recalibration

The process of adjusting or fine-tuning a system, like the HPA axis, in response to new experiences or changes in the environment.

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HPA Axis Functioning

How well the body's stress response system, the HPA axis, functions. Measured by cortisol levels and recovery time.

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Peripubertal Period

The period in which children experience major physical and hormonal changes leading to adulthood.

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Group Differences in Stress Response

The study of how different groups respond to stress, particularly during puberty.

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Recalibrating the HPA Axis

The process of modifying or adjusting the body's stress response system to better adapt to stress.

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Study Notes

Correction for "Pubertal stress recalibration reverses the effects of early life stress in postinstitutionalized children"

  • The original publication of the study, "Pubertal stress recalibration reverses the effects of early life stress in postinstitutionalized children," incorrectly omitted an author.
  • Bradley S. Miller should be added to the author list, following Bonny Donzella.
  • Miller's contribution was research performance.
  • The corrected author list, affiliation, and author contributions are now included in the online version.

Pubertal Stress Recalibration

  • Nonhuman animal studies show the hypothalamic-pituitary-adrenocortical (HPA) axis calibrates to environmental conditions during infancy.
  • Children institutionalized in infancy show reduced HPA axis reactivity even after placement in supportive homes.
  • This study investigated whether puberty enables HPA axis recalibration in postinstitutionalized children.
  • 129 postinstitutionalized children (68.2% female) and 170 comparison children (52.4% female) participated in 3 annual sessions from ages 7 to 15.
  • Pubertal stage was assessed annually using nurse examinations.
  • Cortisol reactivity was measured using the Trier Social Stress Test for Children (TSST-C).
  • A significant interaction was observed between group (postinstitutionalized vs. comparison) and pubertal stage.
  • Increased cortisol stress reactivity was found in postinstitutionalized youth with increasing pubertal stages.
  • This effect was not observed in comparison youth.
  • Puberty offers a second sensitive period for HPA axis recalibration, contingent on supportive environments.
  • Interventions for children with early-life adversity should focus on the prepubertal and peripubertal period for optimal impact on stress-mediating systems.

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Description

This quiz explores the effects of institutional care during infancy on the HPA axis and pubertal development in post-institutionalized youth. Topics include the Trier social stress test, cortisol awakening response, and significant findings regarding the peripubertal period. Test your knowledge on the associated factors and implications of early life stress.

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