Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Need for Obtaining Pure Cultures01:29

Need for Obtaining Pure Cultures

1.0K
Pure cultures, defined as the growth of a single microorganism species isolated from mixed populations, are fundamental tools in microbiological research and practical applications. These cultures ensure genetic and physiological uniformity, allowing researchers to study microbial traits under controlled conditions.Isolation and Maintenance of Pure CulturesObtaining a pure culture involves isolating a single microbial type from a mixed sample through techniques such as serial dilutions, streak...
1.0K
Techniques for Isolation of Pure Cultures01:24

Techniques for Isolation of Pure Cultures

1.8K
Microorganisms are routinely cultured in the laboratory using various techniques to isolate, grow, and quantify them for further study. These methods rely on inoculating microorganisms into a suitable growth medium under aseptic conditions to prevent contamination. Depending on the objective, inoculation can involve direct transfer or the use of diluted bacterial suspensions as the inoculum.Streak-Plate Method for IsolationThe streak-plate method is a common technique for obtaining pure...
1.8K
Regulation of Stroke Volume01:27

Regulation of Stroke Volume

4.7K
The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
4.7K
Cardiac Output and Stroke Volume01:11

Cardiac Output and Stroke Volume

4.5K
Cardiac output (CO) is an integral aspect of human physiology, reflecting the heart's efficiency and responsiveness to the body's needs. It represents the volume of blood that the left or right ventricle ejects into the aorta or pulmonary trunk each minute. The CO is calculated by multiplying the heart rate (HR)—the number of heartbeats per minute—by the stroke volume (SV)—the amount of blood pumped out with each heartbeat.
In an average resting adult male, the typical cardiac...
4.5K
Cardiac Output II: Effect of Stroke Volume on Cardiac Output01:22

Cardiac Output II: Effect of Stroke Volume on Cardiac Output

3.2K
Cardiac output (CO), the amount of blood the heart pumps per minute, is a parameter in cardiovascular physiology determined by stroke volume and heart rate. Stroke volume, the amount of blood pushed from one of the ventricles per heartbeat, is influenced by preload, afterload, and contractility.
Preload
Preload refers to the initial elongation of the cardiac myocytes before contraction and is related to the volume of blood filling the heart at the end of diastole, or end-diastolic volume. The...
3.2K
Hypothalamic-Pituitary Axis01:37

Hypothalamic-Pituitary Axis

65.6K
The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
65.6K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

<sup>68</sup>GA DOTATATE PET in Schwannomas: Distinct Avidity Pattern Supporting Noninvasive Diagnosis.

AJNR. American journal of neuroradiology·2026
Same author

NI-RADS in posttreatment head and neck cancer surveillance: a framework for standardized imaging with clinical impact.

Cancer imaging : the official publication of the International Cancer Imaging Society·2026
Same author

Rates of CT myelography epidural contrast extravasation at puncture site by spinal needle type.

Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences·2025
Same author

In Response to Parotid Pleomorphic Adenoma and Apparent Diffusion Coefficient.

The Laryngoscope·2025
Same author

CSF pressures in spontaneous intracranial hypotension due to CSF-venous fistula: A retrospective analysis.

Clinical neurology and neurosurgery·2025
Same author

CT-guided paramaxillary glossopharyngeal nerve block: A novel and potentially safer approach for diagnostic confirmation and temporary treatment of glossopharyngeal neuralgia.

Clinical imaging·2025

Related Experiment Video

Updated: Jan 21, 2026

Modeling Stroke in Mice: Focal Cortical Lesions by Photothrombosis
06:07

Modeling Stroke in Mice: Focal Cortical Lesions by Photothrombosis

Published on: May 6, 2021

7.6K

Pure Cortical Stroke Causing Hemichorea-Hemiballismus.

Sara Strauss1, Daniel Rafie1, Anitha Nimma1

  • 1Hackensack Meridian Health JFK Medical Center, Neurology Department, Edison, New Jersey.

Journal of Stroke and Cerebrovascular Diseases : the Official Journal of National Stroke Association
|July 29, 2019
PubMed
Summary

Acute ischemic stroke can cause hemichorea-hemiballism even without subcortical involvement. This case highlights that strokes in other brain regions can also lead to these movement disorders.

Keywords:
Stroke—movement disorder—hemichorea—hemiballism

More Related Videos

Photothrombotic Ischemia: A Minimally Invasive and Reproducible Photochemical Cortical Lesion Model for Mouse Stroke Studies
08:40

Photothrombotic Ischemia: A Minimally Invasive and Reproducible Photochemical Cortical Lesion Model for Mouse Stroke Studies

Published on: June 9, 2013

36.8K
Modeling Stroke in Mice: Transient Middle Cerebral Artery Occlusion via the External Carotid Artery
07:26

Modeling Stroke in Mice: Transient Middle Cerebral Artery Occlusion via the External Carotid Artery

Published on: May 24, 2021

8.2K

Related Experiment Videos

Last Updated: Jan 21, 2026

Modeling Stroke in Mice: Focal Cortical Lesions by Photothrombosis
06:07

Modeling Stroke in Mice: Focal Cortical Lesions by Photothrombosis

Published on: May 6, 2021

7.6K
Photothrombotic Ischemia: A Minimally Invasive and Reproducible Photochemical Cortical Lesion Model for Mouse Stroke Studies
08:40

Photothrombotic Ischemia: A Minimally Invasive and Reproducible Photochemical Cortical Lesion Model for Mouse Stroke Studies

Published on: June 9, 2013

36.8K
Modeling Stroke in Mice: Transient Middle Cerebral Artery Occlusion via the External Carotid Artery
07:26

Modeling Stroke in Mice: Transient Middle Cerebral Artery Occlusion via the External Carotid Artery

Published on: May 24, 2021

8.2K

Area of Science:

  • Neurology
  • Stroke Medicine
  • Movement Disorders

Background:

  • Hemichorea-hemiballism is an uncommon initial presentation of acute ischemic stroke.
  • Typically, these strokes involve deep subcortical structures like the basal ganglia or subthalamic nucleus.

Observation:

  • A 72-year-old male with vascular risk factors presented with acute right-sided hemichorea-hemiballism.
  • Initial workup excluded metabolic, infectious, and toxic causes, and EEG showed no epileptiform activity.
  • MRI revealed an acute ischemic stroke in the parieto-occipital region, sparing subcortical structures.

Findings:

  • The patient was diagnosed with an acute ischemic stroke in the parieto-occipital cortex.
  • Atrial fibrillation was identified as a potential cause and managed accordingly.
  • This case demonstrates hemichorea-hemiballism resulting from a cortical stroke.

Implications:

  • Strokes affecting cortical areas, not just subcortical structures, can manifest as hemichorea-hemiballism.
  • Broadens the understanding of stroke-related movement disorders.
  • Highlights the importance of comprehensive stroke evaluation beyond typical locations.