Axis I disorders are predominantly mood disorders while Axis II disorders are personality disorders.
The differences are important because Axis II disorders are only personality disorders and mental retardation (Trait disorders as opposed to the state disorders listed on Axis I). Axis II disorders are those that have an enduring pattern which is inflexible and pervasive across a broad range of personal and social situations. The individuals pattern is stable of long duration and its onset can be traced back at least to adolescence or early adulthood. Axis I disorders conversely are may not be as pervasive and carry throughout ones lifespan. It is important to list Axis II disorders separately from Axis I so that the clinician will give adequate consideration to it as they might otherwise be overlooked in the face of the more florid Axis I disorders.
Axis I - autism spectrum disorders are considered mental health disorders
Learning disabilities are on Axis II.Actually learning disabilities are listed under Axis 1.Axis I focuses on clinical disorders. This axis includes diagnoses like Dementia, Schizophrenia and other Psychotic Disorders, Mood Disorders (like Depression), Anxiety Disorders, Learning Disorders, Eating Disorders, and Adjustment Disorders. It's also important to note that Substance-Related Disorders fall under Axis I.Axis II deals with Personality Disorders like Antisocial Personality Disorder, Obsessive Compulsive Disorder, and Narcissistic Personality Disorder. While many disorders ordinarily diagnosed during childhood (i.e. Learning Disorders, Autism, etc) fall under Axis I of the DSM, the DSM classifies Mental Retardation in general under Axis II.
Axis II, with mental retardation and learning disabilities. Axis II disorders go on throughout the person's whole life.
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In the DSM-IV, Attention-Deficit/Hyperactivity Disorder (ADHD) is typically diagnosed on Axis I as a neurodevelopmental disorder. It involves symptoms of inattention, hyperactivity, and impulsivity. It is important to note that the DSM-5 has since replaced the multi-axial system with a more integrated approach to diagnosis.
Axis 2 of the DSM classification system includes personality disorders and intellectual disabilities. These are considered to be enduring and pervasive patterns of behavior that impact an individual's functioning and overall well-being.
I think it would go under both Axis I (psychological disorders other than Mental Retardation and/or Personality Disorders) and Axis III (medical conditions) aeb it is a medical disorder but it also has psychological ailments as well being that it is in the DSM-IV.
In the DSM-IV-TR, and in the upcoming DSM-V, ADHD is coded on Axis I. Axis II is reserved for developmental delay and personality disorders.
list common disorders with muscoskeletal system