Lecture 23: Childhood Trauma an Adverse Experience, A pathway to Illness Flashcards
What does Berkowitz think about childhood maltreatment?
Childhood maltreatment and trauma is arguably the primary public health issue in the nation
What are the characteristics of posttraumatic symptoms?
Responses are due to an injury caused by experience
Results in dysregulation of neurophysiological, psychological and cognitive functioning
Trauma = dysregulated response to a potentially injurious event…an event is NOT a trauma…usually a series of events
-response to experience is age dependent
What is the three legged stool for predicting developmental and health trajectories?
- Genetic prenatal and neurodevelopmental factors
- Attachment and relational patterns
- social economic environment
Kicking out any of these three legs = stool falls down
What is an adverse experience?
Adverse experience has potential to cause brain injury
-accumulation of adverse experiences are likely to cause injury, often due to caregivers in childhood
What is PTSD?
One of many posttraumatic disorders
Complex and debilitating
PTSD can be induced by substance dependence, depression, separation anxiety
Rarely the result of a single incident
What is the epidemiology of childhood trauma?
15.5 million children are exposed to domestic violence each year
7 million exposed to severe and chronic intrafamilial violence
45.4 million injured youth treated in ED and 20% will develop PTSD
What is the stress circuit?
HPA axis or Hypothalamus-pituitary-adrenal
Cortisol is stress mediator
When cells in hippocampus detect cortisol, they send signals to hypothalamus to shut down stress circuit
What is the significance of the rat pup study?
High-nurturing mothers raise high-nurturing offspring
Low-nurturing mothers raise low-nurturing offspring
-whether a pup grows up to be anxious or relaxed depends on the mother that raises it…NOT the mother that gives birth to it
What are potential mechanisms of poor development?
Lower hippocampal GR methylation levels in well-nursed pups
Higher hippocampal GR methylation levels in poorly-nursed pups
-more methyl groups = less rate of transcription = fewer glucocorticoid receptors in hippocampus
-fewer GR receptors means cortisol feedback loop was impaired
-more release of cortisol
What other genes in the HPA axis are linked to stress?
CRH (corticotropin releasing hormone)
AVP (vasopressin)
During stress, increase in CRH and AVP
Linked to cognitive and affective disorders
What is the significance of methylation?
More methylation leads to MORE stress hormones in body
Methylation appears in hippocampal GC receptors
Shows that methylation is reversible…you can reverse effects of low-nurtured rat by injecting drug that REMOVES methyl groups
Less methylation = rat takes on more relaxed personality once GR gene turned on
What are some genes that lead to vulnerability to stress?
5-HTTLRP short version
MAOA gene
-maltreated children with gene that codes for low amount of MAOA are 8x more likely to be antisocial
What is the link between neglect/abuse and telomere length?
Neglect and abuse led to telomeric shrinkage
Orphans had the telomere length as 65 yo
What are common symptoms of traumatic response in children?
Memory problems Poor concentration Anxiety Impulsiveness Withdrawal Irritability Procrastination Fighting Sleeping +/- Chest pain and Increased HR
What are potential adverse childhood experiences?
- Child physical abuse
- Child sexual abuse
- Child emotional abuse
- Physical neglect
- Emotional Neglect
- Mentally ill, depressed or suicidal person in the home
- Drug addicted or alcoholic family member
- witnessing domestic violence against the moher
- loss of a parent to death or abandonment, including abandonment by divorce
- incarceration of any family member