Elsevier

The Lancet

Volume 352, Issue 9123, 18 July 1998, Page 200
The Lancet

Research Letters
Cortical processing in persistent vegetative state

https://doi.org/10.1016/S0140-6736(05)77805-3Get rights and content

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    Therefore, only the neurophysiological investigations were considered in our review aiming to provide the clinicians with a timely survey of the real clinical impact of tools used in the standard assessment of patients with prolonged DoC. Finally, although the present analysis is focussed on stimulus-related techniques, we cannot fail to mention the role of two other neurophysiological tests, i.e., ongoing EEG (Menon et al., 1998; Leòn-Carriòn et al., 2008; Bagnato et al., 2010; Cruse et al., 2011; Logi et al., 2011; Forgacs et al., 2014; Sitt et al., 2014; Bagnato et al., 2015; Estraneo et al., 2016) and sleep/wake polysomnography (Isono et al., 2002; Landsness et al., 2011; Cologan et al., 2013; deBiase et al., 2014; Arnaldi et al., 2016; Wislowska et al., 2017), which can provide clinically relevant informations in VS/UWS and MCS patients. Although the use of sensory EPs in the study of prolonged DoC (namely the VS) dates back to the mid-seventies (Dolce and Sannita, 1973; Kawamura et al., 1975), it was only 20 years later that the neuroscience community realized that EPs could detect, in some of these persistently unresponsive patients, residual cognitive processing unnoticeable on clinical grounds only, possibly implying some covert conscious awareness (Marosi et al., 1993; Glass et al., 1998; Menon et al., 1998; Jones et al., 2000; Kotchoubey et al., 2001; Schiff et al., 2002).

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