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Related Concept Videos

Factors Affecting Respiration01:24

Factors Affecting Respiration

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Respiration is a crucial physiological function involving exchanging oxygen (O2) and carbon dioxide (CO2) between an organism and its environment. Various factors can impact this essential process:
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Hyperpnea and Hyperventilation01:25

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Hyperventilation refers to a higher-than-normal rate and depth of breathing, often associated with anxiety attacks. This excessive breathing surpasses the body's need to expel CO2, leading to a condition known as hypocapnia - an unusually low level of carbon dioxide in the blood. Hypocapnia can constrict cerebral blood vessels, reducing blood flow to the brain, which may result in dizziness or fainting. Early signs include tingling and muscle spasms in the hands and face, caused by falling...
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Chemical Factors Affecting Respiration Centers01:31

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Chemical factors such as changing CO2, O2, and H+ levels in arterial blood play a critical role in influencing respiration depth and rates. These variations are detected by chemoreceptors—specialized sensors located in two primary body areas. Central chemoreceptors are found throughout the brain stem, including the ventrolateral medulla, while peripheral chemoreceptors are located in the aortic arch and carotid arteries.
CO2 has a potent influence on respiration and is strictly regulated....
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Other Factors Affecting Respiration Centers01:17

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Breathing is primarily an involuntary activity regulated by the brainstem respiratory centers. However, it can also be consciously controlled, allowing us to hold our breath or take deeper breaths when needed. This voluntary control is facilitated by the cerebral motor cortex, which bypasses the medullary centers to stimulate the respiratory muscles directly.
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Higher Mental Functions of the Brain: Language01:10

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Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
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Hypercapnic respiratory failure, also known as Type 2 or ventilatory respiratory failure, is a severe condition characterized by the body's inability to effectively remove carbon dioxide (CO2) from the bloodstream. It leads to an arterial CO2 pressure (PaCO2) exceeding 45 mmHg and a blood pH above 7.35. This situation indicates that the body's ventilatory demand, or the ventilation needed to maintain normal PaCO2 levels, surpasses its supply or the maximum gas flow achievable without...
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Updated: Mar 14, 2026

Coherence between Brain Cortical Function and Neurocognitive Performance during Changed Gravity Conditions
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Brain Food at High Altitude.

Vishal Jain1

  • 1Vallabhbhai Patel Chest Institute, Delhi University, Delhi, 110007, India. vishal6784@gmail.com.

Advances in Neurobiology
|September 22, 2016
PubMed
Summary

High altitude reduces oxygen availability, causing hypobaric hypoxia (HH) and cognitive decline, particularly impacting spatial memory. Herbal interventions may offer protection and improve cognitive performance at high altitudes.

Area of Science:

  • Altitude Medicine
  • Neuroscience
  • Pharmacology

Background:

  • High altitude environments (3000-8000+ ft) pose physiological challenges due to reduced oxygen partial pressure.
  • This leads to hypobaric hypoxia (HH), a condition reducing oxygen supply to the body and potentially causing oxidative stress.
  • Cognitive functions, especially spatial memory, can be impaired due to neurodegeneration, with the hippocampus being particularly vulnerable.

Purpose of the Study:

  • To review the detrimental effects of high altitude on cognitive function.
  • To explore potential herbal interventions for mitigating cognitive impairment caused by hypobaric hypoxia.
  • To enhance cognitive performance and provide neuroprotection in high-altitude dwellers and visitors.

Main Methods:

  • Review of existing literature on high-altitude physiology and cognitive function.
Keywords:
Brain foodCognitionHigh altitudeHypobaric hypoxiaMemory impairmentNutraceuticalsOxidative stress

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  • Analysis of the pathophysiological mechanisms linking hypobaric hypoxia to neurodegeneration.
  • Identification and evaluation of herbal compounds with potential cognitive-enhancing and neuroprotective properties.

    • Main Results:

    • High altitude exposure significantly impairs cognitive functions, notably spatial memory, due to hypobaric hypoxia-induced neurodegeneration.
    • The hippocampus is identified as a critical brain region susceptible to hypoxia-related damage.
    • Preliminary evidence suggests certain herbal interventions may counteract these negative effects.

    Conclusions:

    • Hypobaric hypoxia at high altitudes poses a significant risk to cognitive health, particularly spatial memory.
    • Herbal remedies present a promising avenue for therapeutic strategies to improve cognitive performance and offer neuroprotection.
    • Further research into specific herbal interventions is warranted to validate their efficacy in high-altitude populations.