J I Tracy
Affiliation: Thomas Jefferson University
- A comparison of 'Early' and 'Late' stage brain activation during brief practice of a simple motor taskJ I Tracy
Departments of Neurology and Radiology, Thomas Jefferson University, Jefferson Medical College, 111 South 11th Street, Gibbon Bldg Suite 4150, Philadelphia, PA 19107, USA
Brain Res Cogn Brain Res 10:303-16. 2001..Implications for defining the neurocognitive function of the structures involved, particularly the cerebellum, are discussed...
- Anticholinergicity and cognitive processing in chronic schizophreniaJ I Tracy
Thomas Jefferson University Jefferson Medical College, Department of Neurology, Gibbon Building, Suite 4150, 111 South 11th Street, Philadelphia, PA 19107, USA
Biol Psychol 56:1-22. 2001..Relevant neuroanatomic structures and implications for models of cognitive deficits in schizophrenia are discussed...
- A comparison of memory for verbal and non-verbal material in schizophreniaJ I Tracy
Department of Radiology and Neurology, Thomas Jefferson University Jefferson Medical College, Gibbon Building, Suite 415, 111 South 11th Street, Philadelphia, PA 19107, USA
Schizophr Res 50:199-211. 2001..To the degree verbal and non-verbal memory functions can be lateralized in the brain, these data support the possibility of deficits in both right and left hemisphere declarative memory systems in schizophrenia...
- Test of a potential link between analytic and nonanalytic category learning and automatic, effortful processingJ I Tracy
Thomas Jefferson University Jefferson Medical College, 111 South 11th Street, Philadelphia, PA 19107, USA
Brain Cogn 46:326-41. 2001..The data do not support any simple mapping of analytic and nonanalytic forms of category learning onto the automatic and effortful processing dichotomy and challenge simple models of brain asymmetries for such procedures...
- Cerebellar mediation of the complexity of bimanual compared to unimanual movementsJ I Tracy
Department of Neurology, Jefferson Medical College, Thomas Jefferson University, Philadelphia 19107, USA
Neurology 57:1862-9. 2001....
- Regional brain activation associated with different performance patterns during learning of a complex motor skillJoseph Tracy
Department of Neurology, Thomas Jefferson University Jefferson Medical College, Philadelphia, PA 19107, USA
Cereb Cortex 13:904-10. 2003..While these interpretations are not resolved, the study makes clear that single time-point images of motor skill can be misleading because the brain structures that implement action can change following practice...
- Differential brain responses when applying criterion attribute versus family resemblance rule learningJ I Tracy
Department of Neurology and Radiology, Thomas Jefferson University, Jefferson Medical College, 111 South 11th Street, Gibbon Bldg, Suite 4150, Philadelphia, PA 19107, USA
Brain Cogn 51:276-86. 2003..For instance, anterior temporal structures may help attune visual processing systems to high frequency components to support the learning of criterial, highly predictive rules...
- Investigation of alternating and continuous experimental task designs during single finger opposition fMRI: a comparative studyF B Mohamed
Department of Radiological Sciences, MCP Hahnemann University School of Medicine, Philadelphia, PA 19129, USA
J Comput Assist Tomogr 24:935-41. 2000..The results showed that different patterns of acquisition yield differences in the BOLD signal at field strength of 1.5 T, and that an alternating task design can be considered more optimal than a continuous task design...
- The association of mood with quality of life ratings in epilepsyJ I Tracy
Department of Neurology, Thomas Jefferson University Hospital, Philadelphia, PA 19107, USA
Neurology 68:1101-7. 2007..To determine the relative contributions of psychological (mood and anxiety), social, and seizure-related variables to quality of life (QOL) scores in epilepsy...
- BOLD fMRI of the visual cortex: quantitative responses measured with a graded stimulus at 1.5 TeslaFeroze B Mohamed
Department of Radiological Sciences, MCP Hahnemann University, Philadelphia, Pennsylvania 19129, USA
J Magn Reson Imaging 16:128-36. 2002..To measure and quantitatively characterize an activity generated by the neurons of the visual cortex (VC) in response to graded luminous intensity contrast stimuli using a 1.5 Tesla scanner...
- Quantitative functional MR imaging of the visual cortex at 1.5 T as a function of luminance contrast in healthy volunteers and patients with multiple sclerosisScott H Faro
Department of Radiological Sciences, MCP Hahnemann University, 3300 Henry Ave, Philadelphia, PA 19129, USA
AJNR Am J Neuroradiol 23:59-65. 2002..We therefore investigated whether varying luminance contrast levels can help uncover subtle changes in fMR imaging characteristics of the visual cortex in healthy volunteers and patients with MS...
- The effectiveness of low-frequency stimulation for mapping cortical functionAndro Zangaladze
Department of Neurology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA
Epilepsia 49:481-7. 2008..To establish the efficacy and safety of low-frequency electrical stimulation for cortical brain mapping...