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Related Concept Videos

Traumatic Brain Injury l: Introduction01:28

Traumatic Brain Injury l: Introduction

DefinitionTraumatic brain injury, or TBI, is a disturbance of normal brain function induced by an external mechanical force, such as a direct blow to the head or a penetrating injury. It can affect both brain structure and function, producing a wide range of clinical outcomes. TBI is a heterogeneous condition, meaning its effects may differ based on the type, location, and severity of the injury.Basis of ClassificationTBI is classified based on severity, injury mechanism, or pathophysiology. In...
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...
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...
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...
Post-traumatic Stress Disorder01:27

Post-traumatic Stress Disorder

Post-traumatic stress disorder (PTSD) is a psychiatric condition that arises following exposure to traumatic events such as natural disasters, forced displacement, or severe accidents. It significantly impairs individuals' ability to cope with daily activities and disrupts their emotional and psychological equilibrium.
Symptoms and Behavioral Manifestations
A spectrum of distressing symptoms characterizes PTSD. Recurrent flashbacks, where individuals involuntarily relive traumatic events, are a...
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...

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Related Experiment Video

Updated: Jul 16, 2026

Minimally Invasive Surgical Decompression of Occipital Nerves
04:06

Minimally Invasive Surgical Decompression of Occipital Nerves

Published on: September 13, 2024

[Traumatic Horner syndrome].

V M Asensio-Sánchez1, J C Sánchez-Rodríguez, J Macías-Pascual

  • 1Hospital General, Servicio Castellano-Leonés de Salud, Medina del Campo, Valladolid, España. vasensio@hmdc.sacyl.es

Archivos De La Sociedad Espanola De Oftalmologia
|March 16, 2007
PubMed
Summary

Cervical trauma can cause Horner

Area of Science:

  • Neurology
  • Trauma Surgery

Background:

  • Horner's syndrome is characterized by ptosis, miosis, and anhidrosis.
  • Cervical trauma can affect the sympathetic nervous system pathways.

Observation:

  • A 33-year-old man presented with ptosis and miosis in the right pupil following cervical trauma.
  • Computed tomography revealed a neck hematoma causing tracheal deformity and stenosis.

Findings:

  • The patient's symptoms were consistent with Horner's syndrome.
  • A neck hematoma was identified as the cause of the sympathetic pathway damage.

Implications:

  • Cervical trauma can lead to Horner's syndrome, indicating potential damage to the sympathetic pathway.
  • Horner's syndrome in this context may signal a life-threatening condition requiring urgent evaluation.

Related Experiment Videos

Last Updated: Jul 16, 2026

Minimally Invasive Surgical Decompression of Occipital Nerves
04:06

Minimally Invasive Surgical Decompression of Occipital Nerves

Published on: September 13, 2024