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Articles 31 - 34 of 34
Full-Text Articles in Neurosciences
Ipsilesional Biases In Saccades But Not Perception After Lesions Of The Human Inferior Parietal Lobule, Tony Ro, Chris Rorden, Jon Driver, Robert Rafal
Ipsilesional Biases In Saccades But Not Perception After Lesions Of The Human Inferior Parietal Lobule, Tony Ro, Chris Rorden, Jon Driver, Robert Rafal
Publications and Research
We examined the effects of chronic unilateral lesions to either the inferior parietal lobe, or to the dorsolateral prefrontal cortex including the frontal eye fields (FEFs), upon human visual perception and saccades in temporal-order-judgment (TOJ) tasks. Two visual events were presented on each trial, one in each hemifield at various stimulus onset asynchronies (SOAs). In the saccade task, patients moved their eyes to whichever stimulus attracted gaze first. In the perceptual-manual task, they pressed a button to indicate which stimulus was perceived first. Frontal patients showed appropriate TOJs for visual targets in both tasks. Parietal patients showed appropriate TOJs in …
Transcranial Magnetic Stimulation Of The Prefrontal Cortex Delays Contralateral Endogenous Saccades, Tony Ro, Avishai Henik, Liana Machado, Robert D. Rafal
Transcranial Magnetic Stimulation Of The Prefrontal Cortex Delays Contralateral Endogenous Saccades, Tony Ro, Avishai Henik, Liana Machado, Robert D. Rafal
Publications and Research
The contributions of the superior prefrontal cortex (SPFC) and the superior parietal lobule (SPL) in generating voluntary endogenous and reflexive visually guided saccades were investigated using transcranial magnetic stimulation (TMS). Subjects made choice saccades to the left or right visual field in response to a central arrowhead (endogenous go signal) or a peripheral asterisk (exogenous go signal) that were presented along with a single TMS pulse at varying temporal intervals. TMS over the SPFC increased latencies for saccades made in response to an endogenous go signal toward the contralateral hemifield. No effects were observed when the go signal was exogenous …
Neonatal Cranial Ultrasound Abnormalities In Lbw Infants: Relation To Cognitive Outcomes At Age Six, Agnes H. Whitaker, Judy F. Feldman, Ronan Van Rossem, Irvin Sam Schonfeld, Jennifer A. Pinto-Martin, Carolyn Torre, Suzannah R. Blumenthal, Nigel S. Paneth
Neonatal Cranial Ultrasound Abnormalities In Lbw Infants: Relation To Cognitive Outcomes At Age Six, Agnes H. Whitaker, Judy F. Feldman, Ronan Van Rossem, Irvin Sam Schonfeld, Jennifer A. Pinto-Martin, Carolyn Torre, Suzannah R. Blumenthal, Nigel S. Paneth
Publications and Research
bjective: To assess the independent relation of neonatal cranial ultrasound (US) abnormalities in low birth weight (LBW) infants to cognitive outcomes at 6 years of age.
Design: Prospective cohort study.
Sample and Methods: Six-year follow-up data were obtained on a regional birth cohort of LBW infants (< 2 kg) systematically screened as neonates with serial US. US abnormalities were dichotomized into isolated germinal matrix/intraventricular hemorrhage (GM/IVH) and parenchymal lesions/ventricular enlargement (PL/VE). Global cognitive outcomes (mental retardation, borderline intelligence, and normal intelligence) and selected specific cognitive abilities were assessed at 6 years of age with standardized instruments. Multivariate techniques were used to assess the effects of US independent of maternal social …
Neurological Soft Signs: Their Relationship To Psychiatric Disorder And Iq In Childhood And Adolescence, David Shaffer, Irvin Sam Schonfeld, Patricia A. O'Connor, Cornelius Stokman, Paul Trautman, Stephen Shafer, Stephen Ng
Neurological Soft Signs: Their Relationship To Psychiatric Disorder And Iq In Childhood And Adolescence, David Shaffer, Irvin Sam Schonfeld, Patricia A. O'Connor, Cornelius Stokman, Paul Trautman, Stephen Shafer, Stephen Ng
Publications and Research
Defines a neurological soft sign (NSS) as a particular form of deviant performance on a motor or sensory test in a neurological status examination. In the present study, 63 male and 26 female 17-yr-olds who had NSSs at 7 yrs of age were compared with sex- and age-matched controls with no NSSs at age 7 yrs. Data obtained on Ss included behavioral and neurological examination at age 7 yrs and psychiatric, neurologic, and IQ (e.g., WAIS) assessment at adolescence. All 6 females and 12 of the 15 males with an anxiety-withdrawal diagnosis and 13 of the 20 males with an …