Second edition

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hypersexuality see sexual behavior
hypersomnia (excessive daytime
sleepiness) 587
differential diagnosis 587
Kleine–Levin syndrome 580
myotonic dystrophy 372
Prader–Willi syndrome 413
primary/essential 587
traumatic brain injury 292, 587
hypertensive encephalopathy 443–4
clinical features 443–4
delirium 181
seizures 267
differential diagnosis 444
reversible posterior
leukoencephalopathy 444, 445
hyperthermia, malignant, vs neuroleptic
malignant syndrome 684
hyperthyroidism and thyrotoxicosis 537–9
clinical features 538–9
anxiety 226, 537, 538
dementia 165, 538
depression 211, 538
mania 219, 538
psychosis 241, 538
course 538
differential diagnosis 538–9
etiology 538
treatment 538–9
hyperventilation, EEG 29
hyperviscosity syndrome 479
hypnagogic hallucinations 142
narcolepsy 575
hypnic jerks vs myoclonus 77
hypnopompic hallucinations 142
narcolepsy 575
hypnotics see sedative–hypnotics
hypocalcemia
delirium 179
seizures 262
hypochondriasis 300–1
differential diagnosis 301
Briquet’s syndrome 300, 301
delusional disorder 617
hypoglossal nerve testing 12
hypoglycemia 478–9
clinical features 478
delirium 179
dementia 171
seizures 262
differential diagnosis 478–9
transient ischemic attacks 287
hypomagnesemia
delirium 179
seizures 262
hypomania (stage I mania) 215, 215–17,
619
differential diagnosis 222
hyponatremia
chronic, overly rapid correction causing
central pontine myelinolysis 479,
480
delirium 179
seizures 262
in subarachnoid hemorrhage 281
hypoparathyroidism, Fahr’s syndrome
485
hypothalamus
in bipolar disorder etiology 621
in depression etiology 626
hamartoma 264–5
tumors, symptoms 597
hypothyroidism 539–41
clinical features 539–40
dementia 165, 540
depression 212, 539
psychosis 241, 539–40
differential diagnosis 540–1
post-partum depression 630
in Down’s syndrome 407
etiology 540
primary 240, 240–1
subclinical 540
secondary 240, 241
tertiary 240, 241
hypoventilation in Pickwickian syndrome
579
hypoxanthine-guanine phosphoribosyl
transferase deficiency 411
hypoxic–ischemic disorders, global
462–5
amnesia 186
delirium 178, 180–1
encephalopathy following see postanoxic
encephalopathy
hysteria see conversion disorder
ictal depressions 252
ictal dystonia 86
ictal EEG 26–8
see also seizures
ictal psychosis 242
ideational apraxia 16, 51, 55–6
differential diagnosis 56
etiology 56
ideomotor apraxia 16, 55–6
etiology 56
illusions see hallucinations
imaging see neuroimaging
imipramine, nocturnal enuresis 575
imitation
of behavior see echopraxia
of movements see mirror movements
or words/speech of others see echopraxia
immediate recall, testing 9
immobility
in akinetic mutism 118
in catatonic stupor 94
immune-related disorder see autoimmune
disorders
immunocompromized persons,
opportunistic infections 494–5
CMV 495
immunoglobulin G index, CSF 34
Index 717
immunosuppressant drugs, multiple
sclerosis 547
impulsive behavior
antiparkinsonian drug-induced 350
attention-deficit/hyperactivity disorder
419
inattentiveness see attentiondeficit/hyperactivity
disorder
incoherence
observing for 7
sensory aphasia vs 48
infantile-onset metachromatic
leukodystrophy 374
infarction 277–80
clinical features
abulia 126
asterixis 97
emotional incontinence in 123
hallucinations in pontine infarction
146
mania in 218, 220
seizures 264
imaging 18–19
ischemic see ischemic infarction
lacunar see lacunar infarction
occipital, vs reversible posterior
leukoencephalopathy 445
silent 280
subcortical see CADASIL
in systemic lupus erythematosus 549,
550
traumatic etiology 294
watershed/low-flow 277, 278, 284
see also multi-infarct dementia;
stroke
infections 493–524
congenital see congenital infections
delirium 175, 177–8, 179, 180
multiple sclerosis etiology 546
opportunistic see immunocompromized
persons
see also specific (types of) pathogens
influence, delusions of 147
schizophrenia 608
inhalant abuse 669–70
clinical features 695
ataxia 170
dementia 170, 171, 695
inheritance see entries under genetic
injury, head/brain see trauma
inositol in panic disorder 634
insight 145
assessing 10
insomnia 585–6
etiology
dementia 173, 340
depression 208–9, 625
primary insomnia 585–6
traumatic brain injury 293
fatal familial 528–9
psychosis in 242
primary 585–6