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(Courtesy of the Wellcome Collection, London. Attribution 4.0 International [CC BY 4.0].)
Oct. 09, 2021
Confusional arousals are a type of parasomnia categorized under disorders of arousal, which generally emerge from stage N3 sleep (delta sleep) or relate to arousals occurring during non-REM stage N1 or N2 sleep. Common behaviors include confusion, disorientation, loss of memory and conversing, relative unresponsiveness to environmental stimuli, and display of more or less complex automatic behavior.
Oct. 05, 2021
Stroke & Vascular Disorders
CNS complications of cardiac catheterization include cerebrovascular events such as transient ischemic attack, ischemic stroke, or intracerebral hemorrhage, infectious events such as embolization of infected material to the brain, retinopathy, myelopathy, and seizures provoked by contrast agent use. PNS complications include mononeuropathy including femoral nerve compression, plexopathy, and radiculopathy. Stroke may occur during, immediately following, or up to 36 hours after the procedure.
Mar. 05, 2018
Sleep dysfunctions are associated with many neurologic disorders, and can help explain the development of cognitive changes in progressive chronic neurologic diseases. Sleep disorders include insomnia, excessive somnolence, sleep apnea and breathing disorders, narcolepsy, circadian dysrhythmia, parasomnias, and sleep-related movement disorders.
Jan. 25, 2021
Childhood Degenerative & Metabolic Disorders
Slowly progressive ophthalmological changes beginning in childhood and leading to blindness in the fifth decade are the characteristics of gyrate atrophy
Aug. 13, 2020
Feb. 26, 2021
In typical HNPP, motor symptoms predominate over sensory symptoms. Slight compression of peripheral nerves and repeated local exercise leads to episodes of weakness with decreased perception to touch and pain. Attacks present with a single nerve involvement, with onset on awakening, and are usually triggered by mild compression that resolves in days to months.
Oct. 03, 2021
Intracranial subdural empyema represents infection arising in the cleavage plane between the cranial dura mater and the subjacent layer of the meninges, the arachnoid. It is typically associated with sinusitis or otitis, and may also occur as a complication of other cranial or dental infections, neurosurgical procedures, or cranial trauma. It can spread rapidly to cover an entire cerebral hemisphere or much of the posterior fossa, producing a rapidly expanding, potentially fatal mass lesion. Onset of symptoms is often abrupt, including fever, localized cranial pain, focal or generalized headache, and sometimes seizures.
Dec. 04, 2020