The Amygdala Know

In a recent issue of Pediatric News, the Child Psychiatry Consult column featured an excellent discussion by Dr. David Rettew of some new research into a possible association between excessive crying in infancy and emotional problems later in childhood. This longitudinal study of almost 5,000 children included an assessment at 3 months and an MRI at age 10, which found that the infants who were excessive criers also had smaller amygdala. While the orders of magnitude of the researchers’ observations is small, it is interesting that the mothers of excessive criers were slightly more likely to experience mental health problems.

Dr. Rettew wisely cautions us to take note of this study’s findings but avoid overreacting. If indeed excessive crying in infancy is a marker for future problems, at the moment we may want to increase our efforts in helping parents improve their parenting skills using a nonjudgmental approach.

Using Dr. Rettew’s sage advice as a leaping off point, I will add the reminder that we must continue to meet head on the venerable myth that “colic” is a gastrointestinal problem. We must promise to never code out a parental complaint as “colic.” If we want to label it “excessive crying of infancy,” that’s one thing, but using “colic” only serves to perpetuate the myth and all the old, and sometimes dangerous, remedies that continue to cling to it.

Whether we use the term “colicky behavior” or call it “excessive crying,” we must remember these are merely descriptive terms. We have not made a diagnosis and are obligated to keep our minds open to serious and life-threatening conditions that make infants cry excessively — aberrant coronary arteries and urinary obstructions to name just two.

I can’t leave the phenomenon of colic without adding a nickel to the two cents I have already gifted you. When I was in medical school, I am sure I was told something about the amygdala. But, I suspect that I was only expected to recall where it lived. In the 50+ years since that brief encounter, other folks have learned much more. Prompted by this study, I searched what is known about small amygdala. Turns out that sleep deprivation has been associated with smaller amygdala, as has episodic migraine headaches, both in adults.

Regular readers of Letters from Maine can already smell where this is going. For decades I have believed that both excessive crying in infancy and episodic migraine in children are associated with, and my bias would say “caused” by, sleep deprivation. We learned from this study that mothers of excessively crying infants are more likely to have mental health problems. And, I will add that at least one study has shown that mothers and fathers of excessively crying infants are more likely to suffer from migraines.

Whether you join me in my biased interpretation isn’t important. What this study tells us is that there is likely to be something going on in infancy that may be a marker for future mental health problems. Were these children born with small or vulnerable amygdala? Did poor sleep hygiene contribute to the problem by interfering with the growth of their amygdala? I can envision studies that could provide some clarity. I’m not sure many parents would agree to have their happy and well-slept 3-month-olds slid into an MRI tube to serve as controls. But, I wouldn’t be surprised that we could find a sizable number of sleep deprived and frazzled parents of colicky infants who would agree if we told them it might help find an answer.
 

Dr. Wilkoff practiced primary care pediatrics in Brunswick, Maine, for nearly 40 years. He has authored several books on behavioral pediatrics, including “How to Say No to Your Toddler.” Other than a Littman stethoscope he accepted as a first-year medical student in 1966, Dr. Wilkoff reports having nothing to disclose. Email him at pdnews@mdedge.com.

In a recent issue of Pediatric News, the Child Psychiatry Consult column featured an excellent discussion by Dr. David Rettew of some new research into a possible association between excessive crying in infancy and emotional problems later in childhood. This longitudinal study of almost 5,000 children included an assessment at 3 months and an MRI at age 10, which found that the infants who were excessive criers also had smaller amygdala. While the orders of magnitude of the researchers’ observations is small, it is interesting that the mothers of excessive criers were slightly more likely to experience mental health problems.

Dr. Rettew wisely cautions us to take note of this study’s findings but avoid overreacting. If indeed excessive crying in infancy is a marker for future problems, at the moment we may want to increase our efforts in helping parents improve their parenting skills using a nonjudgmental approach.

Using Dr. Rettew’s sage advice as a leaping off point, I will add the reminder that we must continue to meet head on the venerable myth that “colic” is a gastrointestinal problem. We must promise to never code out a parental complaint as “colic.” If we want to label it “excessive crying of infancy,” that’s one thing, but using “colic” only serves to perpetuate the myth and all the old, and sometimes dangerous, remedies that continue to cling to it.

Whether we use the term “colicky behavior” or call it “excessive crying,” we must remember these are merely descriptive terms. We have not made a diagnosis and are obligated to keep our minds open to serious and life-threatening conditions that make infants cry excessively — aberrant coronary arteries and urinary obstructions to name just two.

I can’t leave the phenomenon of colic without adding a nickel to the two cents I have already gifted you. When I was in medical school, I am sure I was told something about the amygdala. But, I suspect that I was only expected to recall where it lived. In the 50+ years since that brief encounter, other folks have learned much more. Prompted by this study, I searched what is known about small amygdala. Turns out that sleep deprivation has been associated with smaller amygdala, as has episodic migraine headaches, both in adults.

Regular readers of Letters from Maine can already smell where this is going. For decades I have believed that both excessive crying in infancy and episodic migraine in children are associated with, and my bias would say “caused” by, sleep deprivation. We learned from this study that mothers of excessively crying infants are more likely to have mental health problems. And, I will add that at least one study has shown that mothers and fathers of excessively crying infants are more likely to suffer from migraines.

Whether you join me in my biased interpretation isn’t important. What this study tells us is that there is likely to be something going on in infancy that may be a marker for future mental health problems. Were these children born with small or vulnerable amygdala? Did poor sleep hygiene contribute to the problem by interfering with the growth of their amygdala? I can envision studies that could provide some clarity. I’m not sure many parents would agree to have their happy and well-slept 3-month-olds slid into an MRI tube to serve as controls. But, I wouldn’t be surprised that we could find a sizable number of sleep deprived and frazzled parents of colicky infants who would agree if we told them it might help find an answer.
 

Dr. Wilkoff practiced primary care pediatrics in Brunswick, Maine, for nearly 40 years. He has authored several books on behavioral pediatrics, including “How to Say No to Your Toddler.” Other than a Littman stethoscope he accepted as a first-year medical student in 1966, Dr. Wilkoff reports having nothing to disclose. Email him at pdnews@mdedge.com.

In a recent issue of Pediatric News, the Child Psychiatry Consult column featured an excellent discussion by Dr. David Rettew of some new research into a possible association between excessive crying in infancy and emotional problems later in childhood. This longitudinal study of almost 5,000 children included an assessment at 3 months and an MRI at age 10, which found that the infants who were excessive criers also had smaller amygdala. While the orders of magnitude of the researchers’ observations is small, it is interesting that the mothers of excessive criers were slightly more likely to experience mental health problems.

Dr. Rettew wisely cautions us to take note of this study’s findings but avoid overreacting. If indeed excessive crying in infancy is a marker for future problems, at the moment we may want to increase our efforts in helping parents improve their parenting skills using a nonjudgmental approach.

Using Dr. Rettew’s sage advice as a leaping off point, I will add the reminder that we must continue to meet head on the venerable myth that “colic” is a gastrointestinal problem. We must promise to never code out a parental complaint as “colic.” If we want to label it “excessive crying of infancy,” that’s one thing, but using “colic” only serves to perpetuate the myth and all the old, and sometimes dangerous, remedies that continue to cling to it.

Whether we use the term “colicky behavior” or call it “excessive crying,” we must remember these are merely descriptive terms. We have not made a diagnosis and are obligated to keep our minds open to serious and life-threatening conditions that make infants cry excessively — aberrant coronary arteries and urinary obstructions to name just two.

I can’t leave the phenomenon of colic without adding a nickel to the two cents I have already gifted you. When I was in medical school, I am sure I was told something about the amygdala. But, I suspect that I was only expected to recall where it lived. In the 50+ years since that brief encounter, other folks have learned much more. Prompted by this study, I searched what is known about small amygdala. Turns out that sleep deprivation has been associated with smaller amygdala, as has episodic migraine headaches, both in adults.

Regular readers of Letters from Maine can already smell where this is going. For decades I have believed that both excessive crying in infancy and episodic migraine in children are associated with, and my bias would say “caused” by, sleep deprivation. We learned from this study that mothers of excessively crying infants are more likely to have mental health problems. And, I will add that at least one study has shown that mothers and fathers of excessively crying infants are more likely to suffer from migraines.

Whether you join me in my biased interpretation isn’t important. What this study tells us is that there is likely to be something going on in infancy that may be a marker for future mental health problems. Were these children born with small or vulnerable amygdala? Did poor sleep hygiene contribute to the problem by interfering with the growth of their amygdala? I can envision studies that could provide some clarity. I’m not sure many parents would agree to have their happy and well-slept 3-month-olds slid into an MRI tube to serve as controls. But, I wouldn’t be surprised that we could find a sizable number of sleep deprived and frazzled parents of colicky infants who would agree if we told them it might help find an answer.
 

Dr. Wilkoff practiced primary care pediatrics in Brunswick, Maine, for nearly 40 years. He has authored several books on behavioral pediatrics, including “How to Say No to Your Toddler.” Other than a Littman stethoscope he accepted as a first-year medical student in 1966, Dr. Wilkoff reports having nothing to disclose. Email him at pdnews@mdedge.com.