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Related Concept Videos

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...
Increased Intracranial Pressure l: Introduction01:14

Increased Intracranial Pressure l: Introduction

Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component expands, CSF and venous blood...
Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

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...
Bacterial Meningitis I: Introduction01:22

Bacterial Meningitis I: Introduction

Bacterial meningitis is a severe, life-threatening inflammation of the meninges, particularly the pia mater and arachnoid mater, affecting the subarachnoid space, ventricles, and cerebrospinal fluid (CSF). If untreated, it can lead to significant neurological complications or death.Causative AgentsCommon pathogens vary with age and immune status. In adults, major organisms include Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae. Streptococcus agalactiae (group B...
Equilibrium and Balance01:15

Equilibrium and Balance

The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...

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Related Experiment Video

Updated: Jul 4, 2026

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache
10:39

3D-Neuronavigation In Vivo Through a Patient's Brain During a Spontaneous Migraine Headache

Published on: June 2, 2014

Dangerous headaches.

Elio Agostoni1, Andrea Rigamonti

  • 1Divisione di Neurologia, Azienda Ospedaliera A Manzoni, Via Dell'Eremo 9-11, 23900 Lecco (LC), Italy. e.agostoni@ospedale.lecco.it

Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology
|July 17, 2008
PubMed
Summary
This summary is machine-generated.

Emergency department doctors must differentiate primary headaches from secondary headaches. This review covers headache epidemiology, diagnostic clues, and dangerous headache presentations in the ED.

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Area of Science:

  • Emergency Medicine
  • Neurology

Background:

  • Headache is a common and critical presenting complaint in the emergency department (ED).
  • Accurate diagnosis is essential to differentiate between primary and secondary headache disorders.

Purpose of the Study:

  • To review the epidemiology of headaches presenting to the ED.
  • To discuss diagnostic alarms and warning symptoms for headache differential diagnosis.
  • To describe dangerous headache presentations.

Main Methods:

  • Literature review of epidemiological data on headaches in the ED.
  • Analysis of diagnostic criteria and warning signs for secondary headaches.
  • Description of specific "dangerous headache" syndromes.

Main Results:

  • Epidemiological trends of headache presentations in emergency settings.
  • Identification of key clinical features indicative of serious secondary headaches.
  • Characterization of "dangerous headaches" requiring urgent intervention.

Conclusions:

  • Effective management of ED headaches relies on distinguishing primary from secondary causes.
  • Recognizing "warning symptoms" is crucial for timely diagnosis and treatment of dangerous headaches.
  • Understanding headache epidemiology aids in resource allocation and clinical guideline development for emergency care.