Henri Cohen

Université du Québec à Montréal, Psychology, Faculty Member

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Papers by Henri Cohen

Symposium 5: Bridging symposium at tennet and ishn

Brain Cognition, 2005

Symposium 5: Bridging symposium at TENNET and ISHN Models of brain function in the ''LONG'' 18th ... more

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Articulatory Consequences of Parkinson's Disease: Perspectives from Two Modalities

Brain and Cognition, Jul 31, 1999

Language production involves complex yet productively varying motor behavior. Rule-governed combi... more Language production involves complex yet productively varying motor behavior. Rule-governed combinations yield a finite set of formational units combined in an infinite number of ways. The creativity of language ensures that no particular articulation will be highly automatized. Linguistic articulation is highly complex and varied. As such, it differs from the other more automatized motor behaviors typically studied such as learned movements in apraxia studies or repetitive behavior as occurs in walking or other everyday activities. Language also strives to maintain a balance between ease of articulation and ease of perception, while maintaining linguistically relevant distinctions. We report here a number of studies on the articulatory consequences of Parkinson's disease (PD) in the spoken and signed modalities. Our goal is to highlight the commonalities and distinctions between the two modalities of speech and sign that will allow us to better understand the impingements of PD on language production in general.

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Symposium 3: Functional Magnetic Resonance Imaging: from method to madness (applications and design issues in fMRI)

Brain Cognition, 2005

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Symposium 4: Neural bases of timing and time perception

Brain Cognition, 2005

The ability of the brain to process time in the seconds-to-minutes range is a fascinating problem... more

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The Contribution of Subcortical Structures in Cognition and Language

Brain and Cognition, 1999

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Articulatory Consequences of Parkinson's Disease: Perspectives from Two Modalities

Brain and Cognition, 1999

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Long-term cognitive effects of glucocorticoid excess in Cushing’s syndrome

Psychoneuroendocrinology, 2016

We previously found that patients with Cushing&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s ... more We previously found that patients with Cushing&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s syndrome (CS) scored lower than controls in several domains of cognitive function and that correction of hypercortisolism is not necessarily correlated with short-term improvement in intellectual performance. Here, we examined the long-term outcome in patients treated for CS by assessing the extent to which the detrimental effects of glucocorticoid (GC) excess on cognition can be reversed three years after corrective surgery. A battery of neuropsychological tests, including tests of attention, visuospatial processing, learning and memory, and executive functioning were administered pre-treatment and 12, 24 and 36 months post-treatment. We included 18 patients with endogenous CS recruited before surgical treatment and 18 controls matched for age, sex and education. CS patients performed worse than controls on tests of attention, executive functioning and nonverbal aspects of memory. Moreover, at 36 months following eucortisolism, executive function performance and, to a lesser extent, attention tasks showed limited change compared to pre-treatment testing. Chronic hypercortisolism is accompanied by a deleterious impact on aspects of cognitive function. This negative effect on attention, executive performance and nonverbal memory seen in patients with CS suggests a differential effect of excess GCs upon different brain areas and networks. This influence persists years after the return to normal cortisol secretion levels.

Eye-Hand Coordination in Aging and in Parkinson?s Disease

Aging, Neuropsychology, and Cognition (Neuropsychology, Development and Cognition: Section B), 2002

Aiming movements to de®ned target positions were performed as fast and as accurately as possible ... more Aiming movements to de®ned target positions were performed as fast and as accurately as possible by younger and older subjects and by patients in the early stages of Parkinson's disease (PD). Movement time and accuracy were tested in two conditions: with and without a centre cue. Older subjects exhibited slower movement time relative to the younger subjects only when the centre cue was present suggesting inef®cient feedback processing. The performance of patients with PD was found to be as precise as that of older subjects. The movements of PD subjects, however, were slower in both conditions. Finally, the performance of subjects improved over trials. The data suggest that there is no difference in the nature of the control processes used by older and early-stage PD subjects, but that there is a reduction in the speed of these processes in PD.

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At the interface between action verbs and grip force

Evolution of the speech intelligibility of prelinguistically deaf children who received a cochlear implant

Journal of The Acoustical Society of America, 2005

The 2 main objectives of this investigation are (1) to assess the evolution of the speech intelli... more The 2 main objectives of this investigation are (1) to assess the evolution of the speech intelligibility of 12 prelinguistically deaf children implanted between 25 and 78 months of age and (2) to clarify the influence of the age at implantation on the intelligibility. Speech productions videorecorded at 6, 18 and 36 months following surgery during a standardized free play

The Perceptual Representation of Speech in the Cerebral Hemispheres

This chapter contains sections titled: IntroductionPerceptual Representation of InformationExperi... more

Handbook of categorization in cognitive science

... Last but not least, we are grateful to Zofia Laubitz, Marlene Busko, and Sanja Obradovic for ... more

Risperidone gives a cognitive advantage to chronic schizophrenics

The International Journal of Neuropsychopharmacology

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Prosody deficits in basal ganglia disorders: accoustical analyses of linguistic intonation

Brain and Cognition

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Verbal retrieval in Idiopathic Parkinson's disease:a "on-off " study

Archives of neurology

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Dopaminergic damage on procedural learning in Parkinson's disease:intact encoding,impaired long-term retrieval

Journal of Cognitive Neuroscience

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Speech Impairments in Neurodegenerative Diseases/Psychiatric Illnesses

Encyclopedia of Language & Linguistics, 2006

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Language and verbal reasoning in Parkinson's disease

Neuropsychiatry, neuropsychology, and behavioral neurology

Abstract 1. Determined to what extent, if any, deficits in verbal reasoning abilities are observe... more Abstract 1. Determined to what extent, if any, deficits in verbal reasoning abilities are observed in Parkinson&#x27;s disease (PD) Ss. 38 PD Ss (mean age 65.1 yrs) and 19 controls participated in a battery of 7 tests, including 2 verbal fluency tests, a lexical test, a similarities test, a validated French version of the California Verbal Learning Test, an invited inference, and a verbal logical reasoning test. While findings do not show generalized impairment in linguistic functions, PD Ss performed poorly on several tasks, suggesting that complex ...