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Acoustic startle reflex in schizophrenia patients and their first‐degree relatives: Evidence of normal emotional modulation
Author(s) -
Curtis Clayton E.,
Lebow Boyd,
Lake David S.,
Katsanis Joanna,
Iacono William G.
Publication year - 1999
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1017/s0048577299980757
Subject(s) - moro reflex , psychology , first degree relatives , audiology , schizophrenia (object oriented programming) , valence (chemistry) , startle response , acoustic startle reflex , prepulse inhibition , affect (linguistics) , psychosis , emotional valence , reflex , developmental psychology , clinical psychology , psychiatry , neuroscience , cognition , medicine , family history , communication , physics , quantum mechanics
We investigated emotional disturbances in 36 schizophrenia patients, 48 of their first‐degree relatives, and 56 controls to determine if abnormal affective startle modulation could be associated with genetic risk for schizophrenia. Both patients and relatives had a pattern of startle modulation indistinguishable from controls, with potentiated startle amplitude while viewing negative valence slides and attenuation while viewing positive slides. Patients with flat affect did not differ from those without in startle modulation or slide ratings. The patients and their relatives had lower pleasantness ratings of positive slides and the patients had higher pleasantness ratings of the negative slides than controls. The startle paradigm may not be useful for identifying individuals with a genetic liability for schizophrenia. The results suggest that low‐level defensive and appetitive behaviors are unaffected in schizophrenia.