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Related Concept Videos

Acute Respiratory Failure-IV01:23

Acute Respiratory Failure-IV

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Respiratory failure can manifest suddenly or gradually, characterized by a rapid decline in PaO2 and a rapid rise in PaCO2. This situation indicates a severe respiratory problem that may quickly become a life-threatening emergency. One of the early signs of hypoxemic Acute Respiratory Failure (ARF) is a change in mental status due to the brain's sensitivity to oxygen levels and changes in acid-base balance. Symptoms such as restlessness, confusion, and agitation suggest inadequate oxygen...
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A reflex activity is an automatic, involuntary response to specific stimuli. It is a part of our survival mechanism, designed to protect us from potential harm. For example, when a bright light suddenly shines into our eyes, we instinctively close them or look away. This is a simple reflex activity orchestrated by the nervous system without conscious thought or effort.
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REM Sleep Behavior Disorder (RBD) is a sleep disorder characterized by the absence of muscle paralysis that normally occurs during the REM phase of sleep. This absence allows individuals to physically act out their dreams, which are often vivid and disturbing. Common behaviors exhibited during episodes include kicking, punching, and yelling. These actions can be dangerous, potentially leading to injuries for the person with RBD or their bed partner.
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Somatic Spinal Reflexes01:22

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Somatic spinal reflexes are rapid, involuntary muscular responses to external stimuli that involve the somatic musculature and the spinal cord.
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Respiratory system abnormalities are a significant concern in healthcare due to their potential to indicate underlying severe conditions like Chronic Obstructive Pulmonary Disease (COPD), asthma, and pneumonia. These abnormalities can often be detected through physical examination methods like inspection and percussion.
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Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
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Updated: Mar 21, 2026

Implantation of Combined Telemetric ECG and Blood Pressure Transmitters to Determine Spontaneous Baroreflex Sensitivity in Conscious Mice
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Baroreflex Dysfunction in Prader Willi Syndrome.

Manpreet Kaur1, Shival Srivastav2, Ashok Kumar Jaryal3

  • 1Senior Demonstrator, Department of Physiology, All India Institute of Medical Sciences , New Delhi, India .

Journal of Clinical and Diagnostic Research : JCDR
|May 3, 2016
PubMed
Summary
This summary is machine-generated.

Prader-Willi syndrome patients exhibit baroreflex dysfunction, impacting blood pressure regulation. This autonomic neural defect may contribute to cardiovascular issues in individuals with this hypothalamic disorder.

Keywords:
Arterial stiffnessAutonomic dysfunctionCarotid intima thickness

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Area of Science:

  • Cardiology
  • Neurology
  • Genetics

Background:

  • Prader-Willi syndrome (PWS) is a genetic imprinting disorder characterized by hypothalamic dysfunction.
  • PWS is associated with significant cardiovascular morbidity and mortality, potentially linked to autonomic nervous system (ANS) dysfunction.

Observation:

  • A 21-year-old PWS patient underwent comprehensive cardiovascular and autonomic function testing.
  • Tests included vascular structure and function, baroreflex sensitivity, blood pressure variability, heart rate variability, and autonomic reactivity.

Findings:

  • The PWS patient demonstrated impaired baroreflex sensitivity and orthostatic tachycardia.
  • Vascular function tests, including carotid intima-media thickness and arterial stiffness, were within normal limits.
  • These findings suggest baroreflex dysfunction with potential afferent or central autonomic neural defects in PWS.

Implications:

  • Baroreflex dysfunction is a key feature of autonomic impairment in Prader-Willi syndrome.
  • Identifying these autonomic defects is crucial for managing cardiovascular risks in PWS patients.
  • Further research into central and peripheral autonomic neural pathways in PWS is warranted.