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Nerve Excitability Assessment in Chemotherapy-induced Neurotoxicity
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Published on: April 26, 2012

Agrypnia excitata.

Federica Provini1

  • 1IRCCS Istituto delle Scienze Neurologiche di Bologna and Department of BioMedical and NeuroMotor Sciences, University of Bologna, Bellaria Hospital, Via Altura, 3, Bologna, Italy. federica.provini@unibo.it

Current Neurology and Neuroscience Reports
|February 21, 2013
PubMed
Summary
This summary is machine-generated.

Agrypnia excitata (AE) is a sleep disorder with persistent motor and autonomic overactivity. It encompasses fatal familial insomnia, Morvan syndrome, and delirium tremens, linked by limbic system dysfunction.

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Published on: January 13, 2014

Area of Science:

  • Neuroscience
  • Sleep Medicine
  • Neurology

Background:

  • Agrypnia excitata (AE) is a rare syndrome defined by persistent insomnia and hyperarousal.
  • Sleep architecture is severely disrupted, with loss of specific sleep stages and unstable REM sleep.
  • AE manifests with diurnal and nocturnal motor, autonomic, and hormonal overactivity, including elevated norepinephrine and absent melatonin peaks.

Purpose of the Study:

  • To define Agrypnia excitata (AE) as a distinct syndrome.
  • To elucidate the underlying pathogenetic mechanisms in its various clinical manifestations.
  • To highlight the common feature of intralimbic disconnection in AE.

Main Methods:

  • Clinical case series analysis and literature review.
  • Neurophysiological assessment of sleep patterns.
  • Pathophysiological investigation of underlying mechanisms in FFI, MS, and DT.

Main Results:

  • AE is characterized by loss of sleep, persistent motor and autonomic hyperactivation, and unique "oneiric stupor."
  • Norepinephrine levels are high, and the nocturnal melatonin peak is absent in AE.
  • AE encompasses fatal familial insomnia (FFI), Morvan syndrome (MS), and delirium tremens (DT).

Conclusions:

  • Agrypnia excitata results from an intralimbic disconnection affecting the hypothalamus and brainstem reticular formation.
  • Pathogenesis involves visceral thalamus degeneration (FFI), anti-voltage-gated potassium channel antibodies (MS), or GABAergic synapse changes (DT).
  • Understanding AE's shared mechanism provides insights into these distinct neurological disorders.