Faculty Bibliography

BACKGROUND: Identify a group of adults with 'undiagnosed' attention deficit hyperactivity disorder (ADHD) and compare their personal and family medical histories, psychosocial profiles, functional impairment and quality of life with non-ADHD controls. Additionally, compare adults with undiagnosed and diagnosed ADHD to investigate possible reasons why the undiagnosed avoid clinical detection. METHOD: ICD-9 codes for ADHD in administrative claims records and responses to a telephone-administered adult ADHD screener [the Adult ADHD Self-Report Scale (ASRS)] were used to classify approximately 21000 members of two large managed health-care plans as 'undiagnosed' (no coded diagnosis; ASRS positive) or 'non-ADHD' controls (no coded diagnosis; ASRS negative). Patients identified as 'undiagnosed' ADHD were compared with samples of non-ADHD controls and 'diagnosed' ADHD patients (ICD-9 coded ADHD diagnoses) on the basis of demographics, socio-economic status, past and present mental health conditions, and self-reported functional and psychosocial impairment and quality of life. RESULTS: A total of 752 'undiagnosed' ADHD subjects, 199 'non-ADHD' controls and 198 'diagnosed' ADHD subjects completed a telephone interview. Overall, the 'undiagnosed' ADHD cohort demonstrated higher rates of co-morbid illness and greater functional impairment than 'non-ADHD' controls, including significantly higher rates of current depression, and problem drinking, lower educational attainment, and greater emotional and interpersonal difficulties. 'Undiagnosed' ADHD subjects reported a different racial composition and lower educational attainment than 'diagnosed' ADHD subjects. CONCLUSION: Individuals with 'undiagnosed' ADHD manifest significantly greater functional and psychosocial impairment than those screening negative for the disorder, suggesting that ADHD poses a serious burden to adults even when clinically unrecognized

CONTEXT: Previous work has demonstrated marked changes in inpatient mental health service use by children and adolescents in the 1980s and early 1990s, but more recent, comprehensive, nationally representative data have not been reported. OBJECTIVE: To describe trends in inpatient treatment of children and adolescents with mental disorders between 1990 and 2000. DESIGN AND SETTING: Analysis of the Healthcare Cost and Utilization Project Nationwide Inpatient Sample, a nationally representative sample of discharges from US community hospitals sponsored by the Agency for Healthcare Research and Quality. PATIENTS: Patients aged 17 years and younger discharged from US community hospitals with a principal diagnosis of a mental disorder. MAIN OUTCOME MEASURES: Changes in the number and population-based rate of discharges, total inpatient days and average length of stay, charges, diagnoses, dispositions, and patient demographic and hospital characteristics. RESULTS: Although the total number of discharges, population-based discharge rate, and daily charges did not significantly change between 1990 and 2000, the total number of inpatient days and mean charges per visit each fell by approximately one half. Median length of stay declined 63% over the decade from 12.2 days to 4.5 days. Declines in median and mean lengths of stay were observed for most diagnostic categories and remained significant after controlling for changes in background patient and hospital characteristics. Discharge rates for psychotic and mood disorders as well as intentional self-injuries increased while rates for adjustment disorders fell. Discharges to short-term, nursing, and other inpatient facilities declined. CONCLUSIONS: The period between 1990 and 2000 was characterized by a transformation in the length of inpatient mental health treatment for young people. Community hospitals evaluated, treated, and discharged mentally ill children and adolescents far more quickly than 10 years earlier despite higher apparent rates of serious illness and self-harm and fewer transfers to intermediate and inpatient care

A central question in the study of LTP has been to determine what role it plays in memory formation and storage. One valuable form of learning for addressing this issue is associative fear conditioning. In this paradigm an animal learns to associate a tone and shock, such that subsequent presentation of a tone evokes a fear response (freezing behavior). Recent studies indicate that overlapping cellular processes underlie fear conditioning and LTP. The fear response has generally been scored manually which is both labor-intensive and subject to potential artifacts such as inconsistent or biased results. Here we describe a simple automated method that provides unbiased and rapid analysis of animal motion. We show that measured motion, in units termed significant motion pixels (SMPs), is both linear and robust over a wide range of animal speeds and detection thresholds and scores freezing in a quantitatively similar manner to trained human observers. By comparing the frequency distribution of motion during baseline periods and to the response to fox urine (which causes unconditioned fear), we suggest that freezing and non-freezing are distinct behaviors. Finally, we show how this algorithm can be applied to a fear conditioning paradigm yielding information on long and short-term associative memory as well as habituation. This automated analysis of fear conditioning will permit a more rapid and accurate assessment of the role of LTP in memory

Much of the research on long-term potentiation (LTP) is motivated by the question of whether changes in synaptic strength similar to LTP underlie learning and memory. Here we discuss findings from studies on fear conditioning, a form of associative learning whose neural circuitry is relatively well understood, that may be particularly suited for addressing this question. We first review the evidence suggesting that fear conditioning is mediated by changes in synaptic strength at sensory inputs to the lateral nucleus of the amygdala. We then discuss several outstanding questions that will be important for future research on the role of synaptic plasticity in fear learning. The results gained from these studies may shed light not only on fear conditioning, but may also help unravel more general cellular mechanisms of learning and memory

The proportionality of blood oxygen level-dependent (BOLD) response during a cognitive task and that from a hypercapnic challenge was investigated in cortical structures involved in working memory (WM). Breath holding (BH) following inspiration was used to induce a BOLD response characteristic of regional vasomotor reactivity but devoid of metabolic changes. BOLD effects measured during BH were used to normalize individual subject activations during WM, which effectively reduced the confounding influence of individual- and region-specific differences in hemodynamic responsivity common to both tasks. In a study of seven subjects, the BH calibration reduced intersubject variability in WM effect amplitude by 24.8% (P < 0.03). Reduced intersubject variability resulted in a 23.7% increase in group WM activation voxel extent significant at P < 0.001, with further increases at more stringent thresholds. Because the BH task does not require CO(2) inhalation or other invasive manipulations and is broadly applicable across cortical regions, the proposed approach is simple to implement and may be beneficial for use not only in quantitative group fMRI analyses, but also for multicenter and longitudinal studies.

The New York State Office of Mental Health has implemented the browser based Psychiatric Clinical Knowledge Enhancement System (PSYCKES) medication application throughout its inpatient system of care. PSYCKES provides detailed current medication regimens and histories, as well as medication best practices reports at the patient, psychiatrist, ward, and facility levels. South Beach Psychiatric Center (SBPC) has made specific use of a best practices report which details proportions of caseloads and number of patients on two or more concurrent antipsychotic medications. Psychiatrists received extensive application and desktop support and individual and group training was conducted. PSYCKES current and historical medication regimens were reviewed for individual cases and best practices reports were used in psychiatry supervision from January 2004 to March 2005. SBPC psychiatrists achieved marked reductions in the proportions of their caseloads on two or more concurrent antipsychotics. Although we cannot impute causality from this pre-post implementation design, the results of this evaluation suggest that the use of PSYCKES was effective in reducing such regimens for inpatients.

CONTEXT: Child psychosocial issues and maternal depression are underidentified and undertreated, but we know surprisingly little about the barriers to identification and treatment of these problems by primary care pediatricians. OBJECTIVES: The purpose of this work was to determine whether (1) perceived barriers to care for children's psychosocial issues and maternal depression aggregate into patient, physician, and organizational domains, (2) barrier domains are distinct for mothers and children, and (3) physician, patient, and practice/organizational characteristics are associated with different barrier domains for children and mothers. METHODS: We conducted a cross-sectional survey of the 50,818 US nonretired members of the American Academy of Pediatrics. Of a random sample of 1600 members, 832 (745 nontrainee members) responded. This was a mailed 8-page survey with no patients and no intervention. We measured physician assessment of barriers to providing psychosocial care for children's psychosocial problems and maternal depression. RESULTS: Pediatricians frequently endorse the lack of time to treat mental health problems (77.0%) and long waiting periods to see mental health providers (74.0%) as the most important barriers to the identification and treatment of children's psychosocial problems. For maternal depression, pediatricians most often endorsed lack of training in treatment (74.5%) and lack of time to treat (64.3%) as important barriers. Pediatricians' reports of barriers clustered into physician and organizational domains. Physician domains were distinct for children and mothers, but organizational domains were not. Several physician and practice characteristics are significantly associated with the 4 barrier scales, and different characteristics (eg, sociodemographic, attitudinal, and practice features) were related to each barrier area. CONCLUSIONS: Pediatricians endorse a wide range of barriers with respect to the diagnosis and treatment of children's mental health problems and maternal depression. The specificity of factors relating to various barrier areas suggests that overcoming barriers to the identification and treatment of child mental health problems and maternal depression in primary care pediatrics is likely to require a multifaceted approach that spans organizational, physician, and patient issues. In addition, comprehensive interventions will likely require social marketing approaches designed to engage diverse audiences of clinicians and their patients to participate.

Objectives. In 2 studies, we aimed to describe the content of mothers' verbal warnings to their young children and to investigate whether mothers modify their warnings based on the type of dangerous situation and children's age. Study 1. Mothers of 12-, 18-, and 24-month-olds reported in a telephone interview the words and phrases they would use to prevent their children from falling, touching dangerous objects, ingesting poisonous substances, and running away. The words "no," "don't," and "stop" were the most frequent warnings across ages. Mothers also used warnings to elicit their children's attention, regulate children's location, modify children's actions, and to highlight the properties and consequences of specific dangers. The content, diversity and complexity of mothers' warnings varied with children's age and the type of dangerous situation. Study 2. We observed mothers in the laboratory as they warned their 12- and 18-month-old children not to walk down 50 degrees slopes. As in Study 1, mothers primarily relied on the words "no," "don't," and "stop," but again used warnings to elicit attention, regulate location, modify actions, and describe the danger. Mothers used more complex and diverse warnings with older versus younger children. Conclusions. Although simple warnings, such as 'no," "don't," and "stop" hold privileged status at all ages, mothers express a rich array of warnings that are attuned to children's age and the dangers of the situation.

Serotonin reuptake inhibitors may increase symptoms of anxiety immediately following treatment initiation. The present study examined whether acute citalopram increased fear-potentiated startle to predictable and/or unpredictable shocks in healthy subjects. Eighteen healthy subjects each received two treatments, placebo and 20 mg citalopram in a crossover design. Participants were exposed to three conditions including one in which predictable aversive shocks were signaled by a cue, a second in which unpredictable shocks were anticipated, and a third in which no shocks were administered. Changes in aversive states were investigated using acoustic startle stimuli. Citalopram did not affect baseline startle. However, the phasic startle potentiation to the threat cue in the predictable condition was robustly increased by acute citalopram. The sustained startle potentiation in the unpredictable conditions was also increased by citalopram, but only when the drug was given during the first session. These results indicate that a single dose of citalopram is not anxiogenic in itself, but can exacerbate the expression of fear and anxiety.

OBJECTIVE: Deficits in motor inhibition may contribute to impulsivity and irritability in children with bipolar disorder. Studies of the neural circuitry engaged during failed motor inhibition in pediatric bipolar disorder may increase our understanding of the pathophysiology of the illness. The authors tested the hypothesis that children with bipolar disorder and comparison subjects would differ in ventral prefrontal cortex, striatal, and anterior cingulate activation during unsuccessful motor inhibition. They also compared activation in medicated versus unmedicated children with bipolar disorder and in children with bipolar disorder and attention deficit hyperactivity disorder (ADHD) versus those with bipolar disorder without ADHD. METHOD: The authors conducted an event-related functional magnetic resonance imaging study comparing neural activation in children with bipolar disorder and healthy comparison subjects while they performed a motor inhibition task. The study group included 26 children with bipolar disorder (13 unmedicated and 15 with ADHD) and 17 comparison subjects matched by age, gender, and IQ. RESULTS: On failed inhibitory trials, comparison subjects showed greater bilateral striatal and right ventral prefrontal cortex activation than did patients. These deficits were present in unmedicated patients, but the role of ADHD in mediating them was unclear. CONCLUSIONS: In relation to comparison subjects, children with bipolar disorder may have deficits in their ability to engage striatal structures and the right ventral prefrontal cortex during unsuccessful inhibition. Further research should ascertain the contribution of ADHD to these deficits and the role that such deficits may play in the emotional and behavioral dysregulation characteristic of bipolar disorder.