The ascending reticular activating system (ARAS), also known as the extrathalamic control modulatory system or simply the reticular activating system (RAS), is a set of connected nuclei in the brains of vertebrates that is responsible for regulating wakefulness and sleep-wake transitions. The ARAS is in the midbrain reticular formation. [12]

The Ascending Reticular Activating System (ARAS) is defined as a diverse system in the brainstem that projects to the diencephalon and cortex, responsible for producing activation seen in waking and dreaming states through changes in brain wave frequency and amplitude.

Introduction: Action of the ascending reticular activating system (ARAS) on the cerebral cortex is responsible for achievement of consciousness. In this study, we attempted to reconstruct the lower single component of the ARAS from the reticular ...

The ascending reticular activating system (ARAS) is known to play an essential role in maintaining arousal and consciousness. In this report, we describe the case of a patient with impaired consciousness due to injury of the ARAS after bilateral ...

In modern clinical practice, the central importance of the brainstem is manifested by its significance in neuroprognostication after brain injuries and its central place in medical and legal definitions of brain death/death by neurologic criteria (BD/DNC).

Apr 15, 2015 · Impaired consciousness, ascribed to injury of the ascending reticular activating system (ARAS), is a serious clinical manifestation of hypoxic-ischemic brain injury (HI-BI).

Jul 25, 2013 · Introduction: Action of the ascending reticular activating system (ARAS) on the cerebral cortex is responsible for achievement of consciousness. In this study, we attempted to reconstruct the lower single component of the ARAS from the reticular formation (RF) to the thalamus in the normal human brain using diffusion tensor imaging (DTI).

Sep 27, 2017 · The reticular activating system (RAS) consists of neuronal networks originating in brainstem regions that project upward to the subthalamic nucleus and from there to many cortical and subcortical brain structures as indicated by arrows.

Discovery of the ascending reticular activating system (ARAS) can be attributed to work done in research neuroscientist Horace Magoun's laboratory. Before this finding, most scientists would focus on the diencephalon (and anterior midbrain) but not more caudally.

Oct 14, 2020 · We investigated the relationship between consciousness and the ascending reticular activating system (ARAS) by using diffusion tensor tractography (DTT) in patients with traumatic brain injury (TBI). Twenty-six patients with TBI and 13 healthy control subjects were recruited for this study.