Cerebrovascular reactivity is the change in cerebral blood flow in response to a vasodilatory
or vasoconstrictive stimulus. Measuring variations of cerebrovascular reactivity between …

Abdominal muscles serve many roles; in addition to breathing, especially at higher levels of
chemical drive or at increased end-expiratory lung volumes, they are responsible for, or …

To noninvasively estimate cerebral blood flow volume, a prospective study of color duplex
sonography of the common, external, and internal carotid arteries and vertebral arteries of …

To establish reference data and to investigate the development of haemodynamics in the
extracranial carotid and vertebral arteries, we performed a prospective study in 78 age-and …

Becker, Heinrich F., Olli Polo, Stephen G. McNamara, Michael Berthon-Jones, and Colin E.
Sullivan. Effect of different levels of hyperoxia on breathing in healthy subjects. J. Appl …

We used rebreathing with prior hyperventilation to measure ventilatory responses to CO2 at
iso-oxic PO2's of 100, 80, 60 and 40 mmHg in seven subjects. The mean sub-threshold …

Hypoxia increases cerebral blood flow (CBF), but it is unknown whether this increase is
uniform across all brain regions. We used H215O positron emission tomography imaging to …

Therapies to lower intracranial pressure (ICP) after traumatic brain injury (TBI) include
hyperventilation (HV), intravenous mannitol (IM), and cerebrospinal fluid drainage from a …

Both hypoxia and carbon dioxide increase cerebral blood flow (CBF), and their effective
interaction is currently thought to be additive. Our objective was to test this hypothesis. Eight …

Abstract Changes in cerebral blood volume (CBV) after head injury may be an important
determinant of intracranial pressure (ICP). To determine the normal response of CBV to …