Encyclopedia of Clinical Neuropsychology

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

Coma/Near Coma Scale

  • Mark A. SandbergEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-57111-9_171




The Coma/Near Coma (CNC) Scale was designed to measure changes in neurobehavioral status among patients who have sustained severe brain injuries and whose clinical functioning is consistent with vegetative or near-vegetative states. The CNC Scale is useful when reliable, valid, and efficient assessment of patient’s functioning is required to substantiate clinical change or lack thereof in patients whose functioning is at markedly low levels. The CNC Scale expands the levels of the Disability Rating Scale (DRS). It has five levels and is comprised of 11 items that assess dysfunction in the sensory and perceptual dimensions and describes presence of primitive reflexes.

Historical Background

Recognizing a need for rehabilitation professionals to systematically identify and chart changes in functioning in patients whose clinical status is best characterized as approximately “vegetative,” the CNC was developed as a supplement to the Dementia Rating Scale (DRS)....

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Further Readings

  1. Balconi, M., & Arangio, R. (2015). The relationship between coma near coma, disability ratinghs, and event-related potentials in patients with disorders of consciousness: A semantic association task. Applied Psychophysiology and Biofeedback, 40, 327–337.PubMedCrossRefGoogle Scholar
  2. Rappaport, M. (2000). The coma/near coma scale. The center for outcome measurement in brain injury.http://www.tbims.org/combi/cnc. Accessed 6 Jan 2008.
  3. Rappaport, M. (2005). The disability rating scale and coma/near coma scales in evaluating severe head injury. Neuropsychological Rehabilitation, 15(3/4), 442–453.PubMedCrossRefGoogle Scholar
  4. Rappaport, M., Dougherty, A., & Kelting, D. L. (1992). Evaluation of coma and vegetative states. Archives of Physical Medicine and Rehabilitation, 73, 628–634.PubMedGoogle Scholar

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.NeuropsychologyNorthport VA Medical CenterSmithtownUSA