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- 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.
www.sciencedirect.com/topics/neuroscience/ascending-reticular-activating-system
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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.
- Reticular Activating System - an overview | ScienceDirect Topics
The Reticular Activating System is a network of neurons...
- Reticular Activating System - an overview | ScienceDirect Topics
Initially believed to be a largely homogenous network, the ARAS is now understood to comprise a collection of distinct nuclei located in the midbrain and upper pons that provide stimulating input to the cortex directly and indirectly via thalamic and other subcortical relays.
The Reticular Activating System is a network of neurons located in the brainstem that plays a fundamental role in regulating arousal and sleep-wake transitions. It enhances the attentive state of the cortex and facilitates conscious perception of sensory stimuli by projecting to the thalami and then diffusely to the cerebral cortex.
Jul 24, 2023 · The RAS is a component of the reticular formation, found in the anterior-most segment of the brainstem. The reticular formation receives input from the spinal cord, sensory pathways, thalamus, and cortex and has efferent connections throughout the nervous system.
- Joseph H. Arguinchona, Prasanna Tadi
- Asram Medical College, Eluru, India
- 2020
- 2023/07/24
- Subjects
- Clinical Evaluation
- Diffusion Tensor Imaging and Fiber Tracking
- Statistical Analysis
A total of 26 consecutive patients with TBI (mean age 48.2 years, range 20–71 years) and 13 age- and sex-matched normal control subjects (mean age 42.7 years, range 29–63 years) with no history of TBI or neurologic/psychiatric disease were recruited into this study. Inclusion criteria for the 26 patients were as follow: (1) first ever TBI; (2) impa...
The GCS is a representative and validated scale for describing consciousness in TBI and is used for evaluation of the conscious state . The GCS consists of three components (eye-opening, verbal, motor) and the total GCS score ranges between 3 and 15 . The GCS score of the study patients was acquired twice (at TBI onset and during the chronic stage)...
Acquisition of DTI data was performed at an average of 4.7 ± 4.4 months after TBI onset by using a 6-channel head coil on a 1.5 T Philips Gyroscan Intera (Philips, Best, Netherlands) and single-shot echo-planar imaging. For each of the 32 noncollinear diffusion sensitizing gradients, 67 contiguous slices were acquired parallel to the anterior commi...
Statistical analysis was performed by using the SPSS 12.0 for Windows (SPSS, Chicago, IL, USA). An independent t-test was used for determination of the significance of the variances in GCS scores between subgroups A and B. One-way analysis of variance (ANOVA) with Fisher’s least significant difference post-hoc test was performed to determine the si...
- Sung Ho Jang, Young Hyeon Kwon
- 2020
Feb 22, 2019 · The ARAS influences autonomic regulation of respiration, heart rate and blood pressure. The rostral portion of the pons (about midway and up) regulates wakefulness. A bilateral lesion of the tegmentum (and, likely, extending into the medial portion of the brainstem) is needed to affect its function.
Discovery of the ascending reticular activating system (ARAS) can be attributed to work done in research neuroscien-tist Horace Magoun’s laboratory. Before this finding, most scientists would focus on the diencephalon (and anterior midbrain) but not more caudally.
