CMN 552 MODULE 3 STUDY GUIDE
Psychiatric-Mental Health Nurse
Practitioner I
University of South Alabama –
2026/2027 Academic Year
�MODULE 3 OVERVIEW
This study guide covers the following topics based on the CMN 552
curriculum and Sadock's Comprehensive Textbook of Psychiatry :
,Section Topic Pages
1 Obsessive-Compulsive Disorder (OCD) 1-25
2 Body Dysmorphic Disorder 26-35
3 Hoarding Disorder 36-42
4 Trichotillomania (Hair-Pulling Disorder) 43-48
5 Excoriation (Skin-Picking) Disorder 49-52
6 Post-Traumatic Stress Disorder (PTSD) 53-70
7 Acute Stress Disorder 71-78
8 Adjustment Disorders 79-85
SECTION 1: OBSESSIVE-COMPULSIVE DISORDER (OCD)
1.1 DSM-5-TR Diagnostic Criteria for OCD
A. Presence of obsessions, compulsions, or both:
Obsessions are defined by (1) and (2):
,1. Recurrent and persistent thoughts, urges, or images that are experienced, at
some time during the disturbance, as intrusive and unwanted, and cause
marked anxiety or distress
2. The individual attempts to ignore or suppress such thoughts, urges, or images
or to neutralize them with some other thought or action (i.e., by performing a
compulsion)
Compulsions are defined by (1) and (2):
1. Repetitive behaviors (e.g., hand washing, ordering, checking) or mental acts
(e.g., praying, counting, repeating words silently) that the individual feels
driven to perform in response to an obsession or according to rules that must
be applied rigidly
2. The behaviors or mental acts are aimed at preventing or reducing anxiety or
distress, or preventing some dreaded event or situation; however, these
behaviors or mental acts are not connected in a realistic way with what they
are designed to neutralize or prevent, or are clearly excessive
B. The obsessions or compulsions are time-consuming (e.g., take more than 1
hour per day) or cause clinically significant distress or impairment in social,
occupational, or other important areas of functioning.
C. The obsessive-compulsive symptoms are not attributable to the
physiological effects of a substance (e.g., a drug of abuse, a medication) or
another medical condition.
D. The disturbance is not better explained by the symptoms of another mental
disorder.
, 1.2 Specifiers for OCD
Specifier Description
The individual recognizes that OCD beliefs are definitely
With good or fair insight
probably not true or that they may or may not be true
With poor insight The individual thinks OCD beliefs are probably true
With absent The individual is completely convinced that OCD beliefs a
insight/delusional beliefs true
Tic-related Individual has a current or past history of a tic disorder
1.3 Epidemiology of OCD
Characteristic Data
Lifetime prevalence 2-3% of the general population
Rank among psychiatric
4th most common psychiatric diagnosis
diagnoses
Gender distribution (adults) Equal distribution among men and women
Psychiatric-Mental Health Nurse
Practitioner I
University of South Alabama –
2026/2027 Academic Year
�MODULE 3 OVERVIEW
This study guide covers the following topics based on the CMN 552
curriculum and Sadock's Comprehensive Textbook of Psychiatry :
,Section Topic Pages
1 Obsessive-Compulsive Disorder (OCD) 1-25
2 Body Dysmorphic Disorder 26-35
3 Hoarding Disorder 36-42
4 Trichotillomania (Hair-Pulling Disorder) 43-48
5 Excoriation (Skin-Picking) Disorder 49-52
6 Post-Traumatic Stress Disorder (PTSD) 53-70
7 Acute Stress Disorder 71-78
8 Adjustment Disorders 79-85
SECTION 1: OBSESSIVE-COMPULSIVE DISORDER (OCD)
1.1 DSM-5-TR Diagnostic Criteria for OCD
A. Presence of obsessions, compulsions, or both:
Obsessions are defined by (1) and (2):
,1. Recurrent and persistent thoughts, urges, or images that are experienced, at
some time during the disturbance, as intrusive and unwanted, and cause
marked anxiety or distress
2. The individual attempts to ignore or suppress such thoughts, urges, or images
or to neutralize them with some other thought or action (i.e., by performing a
compulsion)
Compulsions are defined by (1) and (2):
1. Repetitive behaviors (e.g., hand washing, ordering, checking) or mental acts
(e.g., praying, counting, repeating words silently) that the individual feels
driven to perform in response to an obsession or according to rules that must
be applied rigidly
2. The behaviors or mental acts are aimed at preventing or reducing anxiety or
distress, or preventing some dreaded event or situation; however, these
behaviors or mental acts are not connected in a realistic way with what they
are designed to neutralize or prevent, or are clearly excessive
B. The obsessions or compulsions are time-consuming (e.g., take more than 1
hour per day) or cause clinically significant distress or impairment in social,
occupational, or other important areas of functioning.
C. The obsessive-compulsive symptoms are not attributable to the
physiological effects of a substance (e.g., a drug of abuse, a medication) or
another medical condition.
D. The disturbance is not better explained by the symptoms of another mental
disorder.
, 1.2 Specifiers for OCD
Specifier Description
The individual recognizes that OCD beliefs are definitely
With good or fair insight
probably not true or that they may or may not be true
With poor insight The individual thinks OCD beliefs are probably true
With absent The individual is completely convinced that OCD beliefs a
insight/delusional beliefs true
Tic-related Individual has a current or past history of a tic disorder
1.3 Epidemiology of OCD
Characteristic Data
Lifetime prevalence 2-3% of the general population
Rank among psychiatric
4th most common psychiatric diagnosis
diagnoses
Gender distribution (adults) Equal distribution among men and women
