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Increased Intracranial Pressure ll: Pathophysiology01:29

Increased Intracranial Pressure ll: Pathophysiology

Increased intracranial pressure (ICP) refers to a potentially life-threatening rise in pressure inside the skull. This usually happens when there is a major change in the volume of brain tissue, blood, or cerebrospinal fluid (CSF) — the three components inside the skull. According to the Monro-Kellie doctrine, if the volume of one component increases, the volumes of the other components must decrease to maintain normal pressure. If this does not happen, ICP rises.The process often begins with...
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A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
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Cluster headache: from treatment to pathophysiology.

Gennaro Bussone1

  • 1Department of Clinical Neurosciences, C. Besta Neurological Institute, Via Celoria 11, 20133 Milan, Italy. bussone@istituto-besta.it

Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology
|July 17, 2008
PubMed
Summary

Cluster headache (CH) and trigeminal autonomic cephalalgias (TACs) research is advancing, with the hypothalamus identified as a key area in their pathophysiology. Neuromodulation shows promise for treating chronic, drug-resistant cases.

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Area of Science:

  • Neurology
  • Neuroscience
  • Pain Research

Background:

  • Cluster headache (CH) and trigeminal autonomic cephalalgias (TACs) are debilitating headache disorders.
  • Understanding their pathophysiology is crucial for developing effective treatments.

Observation:

  • Clinical features like circadian and circannual periodicity suggest a central origin.
  • Functional neuroimaging reveals posterior hypothalamic activation in TACs.
  • Patients with CH exhibit altered biological rhythms, implicating hypothalamic function.

Findings:

  • The hypothalamus, a regulator of biorhythms, modulates nociceptive and autonomic pathways, including trigemino-vascular pathways.
  • Deep brain stimulation is being explored for chronic, drug-resistant CH.
  • Evidence points to hypothalamic involvement in CH pathogenesis.

Implications:

  • Future research aims to clarify the hypothalamus's role as a CH generator.
  • Investigating why neuromodulatory approaches are effective in CH and TACs.
  • Developing targeted pharmacological treatments for the hypothalamus is a key goal.