Neurodevelopmental Disorders Notes

Neurodevelopmental Disorders

Overview

  • Neurodevelopmental disorders are psychiatric disorders characterized by developmental issues that manifest during infancy, childhood, or adolescence and often persist into adulthood.

  • Differences identified between psychiatric disorders in children and adults:

    • Children exhibit lack of abstract cognitive abilities and verbal skills.

    • Their sense of self is constantly evolving, leading to difficulties in stable self-identity.

    • Normal behaviors in children may differ from problematic behaviors; for example, crying in infants is typical, while extreme anxiety in a 5-year-old is concerning.

  • Common mental health issues observed in children and adolescents:

    • Mood disorders

    • Anxiety disorders

    • Eating disorders such as anorexia

Learning Objectives

  • Understand characteristics, risk factors, and family dynamics of:

    • Autism Spectrum Disorder (ASD)

    • Attention-Deficit/Hyperactivity Disorder (ADHD)

  • Develop care plans for children with ASD and ADHD and educate families, teachers, and the community.

  • Advocate for children and adolescents with these disorders and reflect on personal biases.

Intellectual Developmental Disorder

  • Definition and diagnostic criteria:

    • Characterized by below-average intellectual functioning (IQ <70).

    • Severity categorization: mild, moderate, severe, or profound.

  • Impact on daily life:

    • Learning and communication difficulties.

    • Self-care challenges and problems in social skills.

    • Struggles with academic skills, leisure activities, and health and safety awareness.

  • Causes include:

    • Genetic conditions

    • Early embryonic development irregularities

    • Pregnancy or perinatal complications

    • Early medical conditions and environmental factors, often unknown.

Mood and Behavior Disturbances

  • Variability in mood and behavior among those with intellectual disabilities:

    • Some display passive, dependent behaviors.

    • Others may be aggressive or impulsive.

    • Some exhibit minimal disturbances in mood and behavior.

  • Treatment Settings:

    • Mild-to-moderate cases treated at home and within community settings.

    • Severe disorders may require residential or daycare placements.

Autism Spectrum Disorder (ASD)

  • Overview:

    • ASD presents a broad range of symptoms with varying severity.

    • Major challenges include persistent difficulties in social interaction and communication.

  • Common Characteristics:

    • Repetitive behaviors and restricted interests.

    • Sensitivity to sensory input.

  • Treatment Approaches:

    • Behavioral therapies.

    • Educational interventions.

    • Medication management.

  • Box 22.1 - Behaviors common with ASD:

    • Failing to respond to their name by 9 months.

    • Lack of pointing by 14 months.

    • Absence of pretend play by 18 months.

    • Avoidance of eye contact and preference for solitude.

    • Delayed speech and language skills.

    • Obsessive interests and reactions to minor changes.

    • Repetitive movements and atypical responses to sensory experiences.

Related Disorders

Tic Disorders

  • Definition:

    • Characterized by sudden, rapid, recurrent, non-rhythmic motor movements or vocalizations.

    • Can be suppressed temporarily but often exacerbated under stress.

  • Types of Tics:

    • Simple motor tics (blinking, jerking).

    • Simple vocal tics (throat clearing, sniffing).

    • Complex motor and vocal tics, including Tourette’s disorder involving multiple tics.

    • Coprolalia, palilalia, and echolalia are specific types of complex vocal tics.

Chronic Motor or Tic Disorder

  • Defined by the presence of either vocal or motor tics but not both.

  • Transient Tic Disorder:

    • Characterized by single or multiple vocal or motor tics lasting no longer than 12 months.

Learning Disorders

  • Conditions where academic achievement in reading, mathematics, or written expression is below age expectations.

  • Specific Disorders:

    • Dyslexia (reading disorder).

    • Developmental Coordination Disorder (DCD).

    • Stereotypical movement disorder involving movements such as head-banging or self-injurious behavior.

Communication Disorders

  • Language and speech deficits impacting development and academic achievement:

    • Language disorders affecting production or comprehension.

    • Speech sound disorders affecting intelligibility.

    • Stuttering defined by repetitions of sounds and syllables.

    • Social communication disorder that hinders adherence to social conversation rules.

Elimination Disorders

  • More common in males:

    • Encopresis: Inappropriate passage of feces.

    • Enuresis: Involuntary urination during day or night.

Cognitive Disengagement Syndrome

  • Not recognized in DSM-5-TR but noted for symptoms like daydreaming, inattentiveness, and sleepiness, often seen with ADHD.

Attention-Deficit/Hyperactivity Disorder (ADHD)

  • Characterized by inattention and impulsivity, usually diagnosed during preschool or school entry.

  • Symptoms:

    • Persistent patterns of inattention and/or hyperactivity.

    • Commonly identified in males, affecting 9% of school-age children.

    • Up to 60% continue to experience symptoms into adulthood.

  • Common Problems Associated with ADHD Include:

    • Impulsivity and hyperactivity affecting daily functioning.

  • Treatment Approaches:

    • Combination of behavioral interventions and medication management.

Etiology of ADHD

  • **Causes remain unclear but involve:

    • Genetic influences (family history increases risk).**

    • Environmental factors such as prenatal exposure to toxins, severe malnutrition, and brain structure damage.

  • Risk Factors:

    • Family history of ADHD.

    • Lower socioeconomic conditions.

    • High incidence in males and settings involving marital discord or child maltreatment.

Treatment Approaches for ADHD

  • Involves medication strategies (stimulants and non-stimulants) alongside behavioral interventions aimed at reducing symptoms and supporting parents.

  • Special educational assistance may be necessary for academic success.

Psychopharmacology

  • Common Medications:

    • Stimulants like methylphenidate (Ritalin) and amphetamine compounds (Adderall).

    • Efficacy rates of 70-80% in reducing ADHD symptoms.

    • Atomoxetine (Strattera): FDA-approved non-stimulant alternative for ADHD management.

Mental Health Promotion

  • Early detection and intervention foster better mental health outcomes:

    • Screening tools like SNAP-IV and Connor Scale aid in identifying ADHD and related disorders.

    • Early identification of ASD promotes developmental success.

    • Comorbidities frequently include emotional and behavioral problems, necessitating integrated treatment strategies.

Summary

  • Diagnosing psychiatric disorders in children poses challenges due to developmental dynamics.

  • Children experience some identical mental health issues as adults, such as depression and anxiety.

  • Intellectual developmental disorders relate to below-average IQ, implicating self-care and academic challenges.

  • Tic disorders, especially Tourette’s, reflect involuntary movements impacting functionality.

  • Communication and learning disorders complicate children's educational experiences, requiring tailored interventions.