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Related Concept Videos

Brainstem01:19

Brainstem

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The brainstem, located inferior to the brain and superior to the spinal cord, serves as a bridge between the cerebrum and the spinal cord. It plays a vital role in relaying information and controlling critical life functions. It comprises three primary regions: the midbrain, pons, and medulla oblongata.
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The medulla oblongata is a crucial part of the brainstem responsible for controlling various autonomic and involuntary functions. It contains several nuclei, including the olivary, cuneate, gracile, and solitary nuclei.
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Disorders of the Autonomic Nervous System01:18

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The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
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Disorders of the Nervous Tissue01:28

Disorders of the Nervous Tissue

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Nervous tissue is a vital component of the human body's communication system, enabling us to perceive and respond to stimuli. However, like all other tissues, it is vulnerable to disorders and diseases that can significantly impact our neurological functioning.
Homeostatic Imbalances:
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Arteries of the Head and Neck01:26

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The human body's intricate network of arteries ensures that every organ system receives the necessary oxygen and nutrients for optimal function. The arterial network in the head and neck region is particularly complex, providing vital blood flow to the brain, eyes, and other critical structures. Prominent arteries in this region include the internal carotid arteries and the vertebral arteries.
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Pulmonary Hypertension: Classification and Pathogenesis01:30

Pulmonary Hypertension: Classification and Pathogenesis

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Pulmonary hypertension (PH) is a severe health condition in which the mean pulmonary arterial pressure increases to 25 mmHg or more, even when the body is at rest. This high pressure in the blood vessels that transport blood from the heart to the lungs can cause various symptoms, including shortness of breath, can lead to right heart failure, and significantly affect the overall quality of life.
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Brainstem vascular syndromes.

Jorge Moncayo-Gaete1, Julien Bogousslavsky2

  • 1School of Medicine. Universidad de las Américas, Quito, Ecuador.

Handbook of Clinical Neurology
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Summary
This summary is machine-generated.

Brainstem strokes, though uncommon, can cause severe motor, sensory, and eye movement deficits. Large artery disease is the primary cause of brainstem infarcts, often affecting the pons.

Keywords:
AnterolateralBrainstemHemorrhagesInfarctsMedulla oblongataMidbrainParamedianPonsPosterior circulationTegmental

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Area of Science:

  • Neuroscience
  • Vascular Neurology

Background:

  • The brainstem is vital for motor, sensory, arousal, and autonomic functions.
  • It connects extensively with the cortex, basal ganglia, and cerebellum, regulating eye movements.
  • Brainstem vascular supply originates from the vertebrobasilar system.

Purpose of the Study:

  • To summarize the clinical manifestations and etiologies of brainstem strokes.
  • To highlight the neuro-ophthalmologic and neurological deficits associated with brainstem infarcts and hemorrhages.

Main Methods:

  • Review of clinical presentations and etiological factors of brainstem vascular events.
  • Analysis of neuro-ophthalmologic signs and neurological deficits based on stroke location (midbrain, pons, medulla).

Main Results:

  • Brainstem infarcts and hemorrhages are infrequent, with the pons being the most commonly affected area.
  • Clinical manifestations vary widely, including motor, sensory, eye movement, and behavioral changes.
  • Midbrain strokes may present with vertical gaze abnormalities; pontine strokes with horizontal gaze palsies and motor/sensory deficits; medullary strokes with vestibular and autonomic dysfunction.
  • Large artery occlusive disease is the leading cause of brainstem infarcts.

Conclusions:

  • Brainstem strokes, despite their rarity, can lead to significant and diverse neurological impairments.
  • Understanding the specific deficits related to stroke location is crucial for diagnosis and management.
  • Identifying large artery disease as the primary etiology guides treatment strategies.