Visual pursuit: within-day variability in the severe disorder of consciousness.
J Neurotrauma
; 28(10): 2013-7, 2011 Oct.
Article
em En
| MEDLINE
| ID: mdl-21770758
ABSTRACT
Visual pursuit marks substantial recuperation from a vegetative state and evolution into a minimally-conscious state, but its incidence in different studies suggests some unreliability in contrast with its established prognostic relevance. Subjects in vegetative (n=9) or minimally-conscious (n=13) states were tested for visual pursuit 6 times/day (930, 1030, and 1130 am, and 200, 300, and 4.00 pm, for a total of 132 determinations). Visual pursuit was observed at all testing times in 8 minimally-conscious patients, and never in 5 subjects in a vegetative state. Its incidence per subject ranged from 50-100% of testing times in the minimally-conscious state (83±23%), and 0-33% in a vegetative state (7%±12), with spontaneous fluctuations during the day and maximal levels at 10.30 am and 3.00 pm, and was never observed at the post-prandial time point (200 pm). The overall chance of observing visual tracking at least once during the day was â¼33% in the vegetative state, whereas that of not observing it in the minimally-conscious state was â¼38%. These percentages are congruent with the reported misdiagnosis rate between the two conditions, and document spontaneous variability possibly related to circadian rhythms.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Desempenho Psicomotor
/
Acompanhamento Ocular Uniforme
/
Transtornos da Consciência
Tipo de estudo:
Prognostic_studies
Limite:
Adult
/
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
J Neurotrauma
Assunto da revista:
NEUROLOGIA
/
TRAUMATOLOGIA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Itália