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Cerebrospinal fluid pressure.

K C Bradley

    Journal of Neurology, Neurosurgery, and Psychiatry
    |June 1, 1970
    PubMed
    Summary
    This summary is machine-generated.

    Cerebrospinal fluid pressure varies within the skull, with lower pressure at the foramen of Monro and higher pressure at the occipital pole. Posture significantly impacts these intracranial pressure dynamics.

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    Area of Science:

    • Neuroscience
    • Physiology

    Background:

    • Cerebrospinal fluid (CSF) pressure is critical for brain function.
    • Understanding CSF pressure dynamics is essential for neurological health.

    Purpose of the Study:

    • To investigate the non-uniformity of cerebrospinal fluid pressure within the cranial cavity.
    • To analyze the effects of posture and physiological pulsations on CSF pressure.
    • To explore pressure variations in specific neurological conditions.

    Main Methods:

    • Measurement of cerebrospinal fluid pressure at the foramen of Monro and different cranial poles in recumbent positions.
    • Observation of pressure oscillations due to respiration and cardiac pulsation.
    • Comparative pressure studies in humans and goats, including postural changes.

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  • Discussion of anatomical factors (arachnoid granulations, venous lacunae) influencing regional pressure.
  • Consideration of advanced measurement techniques like the Pitot tube for superior sagittal sinus pressure.

    • Main Results:

    • Recumbent CSF pressure at the foramen of Monro is below 100 mm water relative to atmospheric pressure.
    • Oscillations (respiratory and cardiac) increase with rising overall pressure, typically under 50 mm water at the foramen of Monro.
    • Significant pressure gradients exist within the cranium, with higher pressure at the occipital pole (160-190 mm water) compared to the frontal pole.
    • Posture demonstrably affects CSF pressure distribution.
    • Preliminary pressure studies in patients with presenile dementia and dilated ventricles were reported.

    Conclusions:

    • Cerebrospinal fluid pressure is not uniform throughout the cranial cavity and is influenced by posture.
    • Physiological pulsations contribute to CSF pressure variations.
    • Further research into precise pressure measurement methods, particularly in the superior sagittal sinus, is warranted.