Dissociation of Smooth-Pursuit and Saccadic Eye Tracking in Remitted Schizophrenics

Clinical, neuropsychological, and brain structural correlates of smooth-pursuit eye tracking performance in chronic schizophrenia.

“…This finding, in addition to the fact that eye tracking dysfunction was not associated with duration of hospitalization and number of admissions, precludes the possibility that confounding variables, such as chronicity and lengthy hospitalization, were influencing the patients tracking performance. The evidence is consistent with earlier reports that have shown that eye tracking represents a trait characteristic and is not affected by the subject's clinical condition (Iacono et al, 1981).…”

Clinical, neuropsychological, and brain structural correlates of smooth-pursuit eye tracking performance in chronic schizophrenia.

“…This finding, in addition to the fact that eye tracking dysfunction was not associated with duration of hospitalization and number of admissions, precludes the possibility that confounding variables, such as chronicity and lengthy hospitalization, were influencing the patients tracking performance. The evidence is consistent with earlier reports that have shown that eye tracking represents a trait characteristic and is not affected by the subject's clinical condition (Iacono et al, 1981).…”

Eye Movement Dysfunctions in Psychiatric Patients: A Review

“…The integrity of saccadic eye movements even in patients who show saccadic interruptions of slow pursuit movements has several important implications for the etiology of eye movement dysfunctions in psychosis. First, it is consistent with the conclusion of previous studies (Lipton, Frost, and Holzman 1980;Iacono, Tuason, and Johnson 1981;Latham et al 1981;Levin et al 1981) that the anatomical substrate of the eye movement dysfunction must be above the level of the brainstem, the final common pathways of smooth pursuit and saccadic eye movements. Second, it suggests that the eye movement dysfunction is not due to poor motivation, generalized deficit, or deficits of voluntary attention, since patients who have impaired smooth pursuit movements can per-form saccadic movements adequately.…”

Psychophysiological Dysfunctions in the Developmental Course of Schizophrenic Disorders

“…Iacono points out that these EEG findings are in agreement with results obtained with adult schizophrenics and with children born to schizophrenic mothers (Itil 1977). Iacono, Tuason, and Johnson (1981) also found more smooth-pursuit eye tracking errors in this same sample of postpsychotic schizophrenic patients than in the normal control subjects. These results are consistent with evidence that symptomatic schizophrenics and their first-degree relatives display deviant smooth-pursuit eye movements (Holzman et al 1974;Holzman and Levy 1977).…”

Clinical, neuropsychological, and brain structural correlates of smooth-pursuit eye tracking performance in chronic schizophrenia.

“…This finding, in addition to the fact that eye tracking dysfunction was not associated with duration of hospitalization and number of admissions, precludes the possibility that confounding variables, such as chronicity and lengthy hospitalization, were influencing the patients tracking performance. The evidence is consistent with earlier reports that have shown that eye tracking represents a trait characteristic and is not affected by the subject's clinical condition (Iacono et al, 1981).…”

Eye Movement Dysfunctions in Psychiatric Patients: A Review

“…The integrity of saccadic eye movements even in patients who show saccadic interruptions of slow pursuit movements has several important implications for the etiology of eye movement dysfunctions in psychosis. First, it is consistent with the conclusion of previous studies (Lipton, Frost, and Holzman 1980;Iacono, Tuason, and Johnson 1981;Latham et al 1981;Levin et al 1981) that the anatomical substrate of the eye movement dysfunction must be above the level of the brainstem, the final common pathways of smooth pursuit and saccadic eye movements. Second, it suggests that the eye movement dysfunction is not due to poor motivation, generalized deficit, or deficits of voluntary attention, since patients who have impaired smooth pursuit movements can per-form saccadic movements adequately.…”

Psychophysiological Dysfunctions in the Developmental Course of Schizophrenic Disorders

“…Iacono points out that these EEG findings are in agreement with results obtained with adult schizophrenics and with children born to schizophrenic mothers (Itil 1977). Iacono, Tuason, and Johnson (1981) also found more smooth-pursuit eye tracking errors in this same sample of postpsychotic schizophrenic patients than in the normal control subjects. These results are consistent with evidence that symptomatic schizophrenics and their first-degree relatives display deviant smooth-pursuit eye movements (Holzman et al 1974;Holzman and Levy 1977).…”

Clinical, neuropsychological, and brain structural correlates of smooth-pursuit eye tracking performance in chronic schizophrenia.

“…This finding, in addition to the fact that eye tracking dysfunction was not associated with duration of hospitalization and number of admissions, precludes the possibility that confounding variables, such as chronicity and lengthy hospitalization, were influencing the patients tracking performance. The evidence is consistent with earlier reports that have shown that eye tracking represents a trait characteristic and is not affected by the subject's clinical condition (Iacono et al, 1981).…”

Eye Movement Dysfunctions in Psychiatric Patients: A Review

“…The integrity of saccadic eye movements even in patients who show saccadic interruptions of slow pursuit movements has several important implications for the etiology of eye movement dysfunctions in psychosis. First, it is consistent with the conclusion of previous studies (Lipton, Frost, and Holzman 1980;Iacono, Tuason, and Johnson 1981;Latham et al 1981;Levin et al 1981) that the anatomical substrate of the eye movement dysfunction must be above the level of the brainstem, the final common pathways of smooth pursuit and saccadic eye movements. Second, it suggests that the eye movement dysfunction is not due to poor motivation, generalized deficit, or deficits of voluntary attention, since patients who have impaired smooth pursuit movements can per-form saccadic movements adequately.…”

Psychophysiological Dysfunctions in the Developmental Course of Schizophrenic Disorders

“…Iacono points out that these EEG findings are in agreement with results obtained with adult schizophrenics and with children born to schizophrenic mothers (Itil 1977). Iacono, Tuason, and Johnson (1981) also found more smooth-pursuit eye tracking errors in this same sample of postpsychotic schizophrenic patients than in the normal control subjects. These results are consistent with evidence that symptomatic schizophrenics and their first-degree relatives display deviant smooth-pursuit eye movements (Holzman et al 1974;Holzman and Levy 1977).…”