Encyclopedia of Clinical Neuropsychology

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

Double Simultaneous Stimulation

  • Philip SchatzEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-57111-9_174


Bilateral simultaneous stimulation


Double simultaneous stimulation (DSS) is a method of testing afferent visual, somatosensory, and auditory pathways for signs of unilateral brain damage. The examiner presents a stimulus, typically using finger(s), on the side contralateral to and ipsilateral to the suspected lesion, as well as simultaneously on both sides.

Current Knowledge

A patient with unilateral damage will typically detect a single stimulation on the contralateral side, but identify only ipsilateral stimulation during bilateral simultaneous stimulation. This tendency to suppress (or neglect) the contralateral stimulation is also referred to as “extinction.” While unilateral damage may result in decreased or weakened registration of single, contralateral stimuli, these contralateral stimuli are not detected when in competition with stronger, ipsilateral stimuli. The term “clinical confrontation” was first used to describe the evaluative process (Oppenheim 1885)....

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References and Readings

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of PsychologySaint Joseph’s UniversityPhiladelphiaUSA