Eating/Sleep/Sexual Disorders Flashcards
Feautures of AN
The main features of anorexia nervosa are:
● Very low body weight (defined as being 15% below
the standard weight, or body mass index (BMI) of less
than 17.5 kg/m2), which is maintained by restriction
of energy intake.
● Extreme concern about weight and shape, characterized by an intense fear of gaining weight and becoming fat and a strong desire to be thin.
● An undue influence of body weight or shape on
self-evaluation.
● Lack of recognition of the seriousness of low body
weight.
● ICD-10, but not DSM-5, includes amenorrhoea as a
criterion in women.
Greatest incidence rates of AN
The incidence of anorexia nervosa based upon primary
care and mental health surveys is about 5 per 100,000.
Rates in the community are considerably higher.
Incidence is greatest among young women, with 40%
of all incident cases occurring in 15–19-year-old females.
Heritability of AN
28-74%
Etiology of AN
Genetics- heritability
Neurobiology- difficulty shifting between tasks, serotonin alterations, grey matter volume increased in OFC and insula
Sociocultural- response to dieting, not dieting itself
Psychological- perfectionism, low self esteem
Family- Minuchin et al. (1978) held that a specific pattern of
relationships could be identified, consisting of ‘enmeshment, overprotectiveness, rigidity and lack of conflict
resolution’. They also suggested that the development of
anorexia nervosa in the patient served to prevent dissent
within the family.
Assessment of eating
What is a typical day’s eating? What are the mealtime
arrangements at home and at school/work?
To what degree is the patient attempting restraint?
Is there a pattern? Does it vary? Is eating ritualized?
Does the patient avoid particular foods? If so, why?
Does she restrict fluids?
What is the patient’s experience of hunger or of any
urge to eat?
Does she binge? Are these objectively large binges?
Does she feel out of control?
How do binges begin? How do they end? How often do
they occur?
Does she make herself vomit? If so, how?
Does she take laxatives, diuretics, emetics, or appetite
suppressants? If so, with what effects?
Does she fast for a day or longer?
Can she eat in front of others?
Does she exercise? Is this to ‘burn off calories’?
Evidence for antidepressants in AN
Systematic reviews show no
clear effect of antidepressants on weight gain, maintenance, or psychological symptoms during re-feeding Antidepressants are also used to treat depression in
anorexia nervosa. The evidence for their effectiveness
in this situation is weak, and guidelines suggest that
antidepressants should not be used until it is apparent
that the symptoms are not merely due to starvation,
and that they persist during restoration of weight (
First description of Bulimia
The syndrome of bulimia nervosa was
first described by Russell (1979) in an influential paper
in which he named the condition and described the key
clinical features in 30 patients who were seen between
1972 and 1978. The prevalence of bulimic behaviours
and the associated harms soon became apparent, and
the syndrome was first included in DSM-III.
Classification of sleep-wake disorders in DSM V
Insomnia disorder Hypersomnolence disorder Narcolepsy Breathing-related sleep disorders Circadian rhythm sleep–wake disorders Non-rapid eye movement (REM) sleep arousal disorders Nightmare disorders REM sleep behaviour disorder Restless legs syndrome Substance/medication-induced sleep disorder
Groups at +risk of persistent sleep problems
Groups at particular risk of persistent sleep problems
include young children and adolescents (Stores, 2015),
the elderly, the physically ill, and those with learning
disability (Heussler, 2016)
Assessment of sleep problems
Screening questions
Do you sleep well enough and long enough?
Are you very sleepy during the day?
Is your sleep disturbed at night?
Sleep history Detailed history of the sleep complaint and a typical sleep–wake cycle Factors that improve or worsen sleep Effect on mood and functioning Past and present treatment History from bed partner Sleep diary Systematic 2-week or longer record
Possible investigations Video recording Actigraphy (wrist-worn) Polysomnography HLA typing Cerebrospinal fluid orexin (hypocretin) levels
Sleep hygeine
Sleep environment Familiar and comfortable Dark Quiet Encourage
Bedtime routines
Consistent time for going to bed and waking up
Going to bed only when tired
Thinking about problems before going to bed
Regular exercise
Avoid Late-evening exercise Caffeine-containing drinks late in the day Using mobile devices or watching TV in bed Excessive alcohol and smoking Excessive daytime sleep Large late meals Too much time in bed lying awake
Causes of excessive daytime sleepiness
Insufficient sleep Narcolepsy Depression Other medical disorders (e.g. hypothyroidism, Prader– Willi syndrome) Shift-work sleep disorder Use of sedative medications Obstructive sleep apnoea
Cataplexy
The most striking of these REM-like states is cataplexy: sudden episodes
of partial or complete paralysis of voluntary muscles
Important comorbidities in narcolepsy
Obesity
Depression
Aetiology of narcolepsy
Type 1 narcolepsy is characterized by
cataplexy and by marked reduction of a peptide called
orexin-A (also called hypocretin-1) in the cerebrospinal
fluid (CSF). This occurs because of a severe and selective loss of the hypothalamic neurons that make this
peptide, which is known to be involved in regulation
of wakefulness. Type 2 narcolepsy is not associated with
cataplexy, and CSF orexin-A levels are normal; its diagnosis is therefore more challenging, and its biological
basis less well understood.
The predominant genetic association to narcolepsy
is HLA-DQB1*06:02
Treatment of narcolepsy
Stimulants
Modafanil
Amphetamines
Venlafaxine, clomipramine can decrease cataplexy
Kleine-Levin Syndrome
This very rare secondary sleep disorder consists of episodes of somnolence, increased appetite, and hypersexuality, often lasting for days or weeks, with long
intervals of normality between them. It usually affects
adolescent boys. The symptoms suggest a hypothalamic
disorder, but its aetiology is unknown. There is no established treatment, but stimulants, lithium, and other
mood stabilizers, are used.
Night terrors
A few hours after going to sleep, the child,
while in stage 3–4 non-REM sleep, sits up and appears
terrified. They may scream, and they usually appear
confused. There are marked increases in heart rate and
respiratory rate.
After a few minutes the child slowly settles and returns
to normal calm sleep. There is little or no dream recall.
A regular bedtime routine and improved sleep hygiene
have been shown to be helpful.
In what stage does sleep walking occur
non-REM sleep
5-12 yo, 15% walk in their sleep at least once
Rapid eye movement sleep behaviour disorder
Rapid eye movement (REM) sleep behaviour disorder is a parasomnia that should be considered when behavioural
problems, particularly agitation or aggression, occur during the night. It is thought to occur when the normal
atonia of REM sleep is lost, so that dreams are acted out.
It is more common in the elderly, particularly men. It is
associated with, and can precede the onset of, neurodegenerative disorders, particularly Parkinson’s disease and
Lewy body dementia (Boeve et al., 2013). Clonazepam
and donepezil may be effective
Risk factors for RLS
2.5%
of the population having significant symptoms. Risk factors include female gender, pregnancy, ageing, low iron
status, and parkinsonism.
How do mood stabilisers impact sexual function
Lower bioavailability of testosterone
Drugs that may impair sexual function
Therapeutic agents Diuretics and antihypertensive agents ● β-blockers, calcium channel blockers, spironolactone Antidepressants and mood stabilizers ● SSRIs, tricyclic antidepressants, monoamine oxidase inhibitors, lithium Anxiolytics and hypnotics ● Benzodiazepines Antipsychotics Antihistamines and histamine H2 -receptor antagonists ● Diphenhydramine ● Ranitidine Parkinson’s disease medications Misused substances Alcohol, heroin, amphetamine, MDMA, cocaine, marijuana
Treatments for sexual dysfunction
Advice, information, and reassurance Treatment of underlying cause Psychological methods Sexual skills training Sex therapy (including sensate focus exercises) CBT Marital therapy Systematic desensitization Educational intervention Drug treatments PDE-5 inhibitors Other physical treatments Vacuum devices Dilators