Encyclopedia of Clinical Neuropsychology

2018 Edition
| Editors: Jeffrey S. Kreutzer, John DeLuca, Bruce Caplan


  • Benjamin Grover-MantheyEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-57111-9_247


Hypoarousal represents a physiological phenomenon in which one lacks an adequate level of nervous system and cerebral excitation to complete a task without significant external stimulation.

Current Knowledge

Arousal is the body’s ability to maintain an appropriate level of central nervous system stimulation in order to complete basic bodily functions and goal-oriented tasks. Level of arousal is a term used to describe a continuum of related physiological states spanning from lowest to highest level of arousal: coma, stupor, delirium, expected normal, and hyperarousal. It is along the lower end of this spectrum that hypoarousal exists.

Many psychological disorders, systemic disease processes, and medications may affect arousal. Brain injuries may result in an initial lower level of arousal that improves as the patient gets further out from the time of injury. Areas of the brain that, when injured, are thought to contribute to hypoarousal include parts of the reticular...

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Physical Medicine and RehabilitationIndiana UniversityIndianapolisUSA