Publications by authors named "Ioannis Zalonis"

Objective: Our work aims to investigate the role of physiological arousal in the expression of neuropsychological deficits in frontal lobe epilepsy (FLE) and mesial temporal lobe epilepsy (mTLE), by drawing on the Lurian theory of brain function.

Methods: For this study a total of 43 patients with focal onset epilepsy has been taken; twenty-four patients with FLE, 19 patients with mTLE and 26 healthy controls, all matched for age and education. Participants underwent a comprehensive neuropsychological assessment including various cognitive domains, such as attention, episodic memory, speed of information processing, response inhibition and mental flexibility, working memory, verbal fluency (phonological & semantic).

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Carotid occlusive disease has been related to ischaemic strokes and cerebral hypoperfusion, thus affecting patients' quality of life, mainly because of cognitive decline and depressive symptoms. Carotid revascularization techniques [carotid endarterectomy (CEA) and carotid artery stenting (CAS)] may, postoperatively, have a positive impact on patients' quality of life and mental condition, though there have been also presented elusive findings and controversial results. The aim of the present study is to evaluate the effect of carotid revascularization (CEA, CAS) on patients' psychological condition and quality of life through a baseline and follow-up examination.

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Recent investigations have raised the question of the role of the anterior lateral temporal cortex in language processing (ventral language network). Here we present the language and overall cognitive performance of a rare male patient with chronic middle cerebral artery cerebrovascular accident with a well-documented lesion restricted to the anterior temporal cortex and its connections via the extreme capsule with the pars triangularis of the inferior frontal gyrus (i.e.

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Background: In contrast to myotonic dystrophy type 1, the cognitive and radiologic profile of myotonic dystrophy type 2 (DM2) is relatively poorly characterized.

Objective: To conduct a pilot study to systematically evaluate cognitive and radiologic features in a cohort of Greek individuals with DM2.

Method: Eleven genetically confirmed individuals with DM2 and 26 age- and education-matched healthy controls were administered the Edinburgh Cognitive and Behavioural Amyotrophic Lateral Sclerosis Screen (ECAS) to screen for impairment in multiple cognitive domains.

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Dysfunction of social cognition is well-recognized as one of amyotrophic lateral sclerosis (ALS) cognitive impairments. Previous studies have mostly associated social cognition subcomponents, including Theory of Mind (ToM), with executive dysfunction using highly-demanding tasks. In the present study, we investigate dysfunction of affective ToM in a sample of ALS patients without dementia and evaluate any possible associations both with executive and non-executive dysfunction.

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Article Synopsis
  • The study examines the role of the right hemisphere (RH) in language after patients suffer from aphasia due to left hemisphere (LH) damage, focusing on specific white matter tracts linking language areas in both hemispheres.
  • Twenty-five chronic post-stroke aphasic patients were compared to 24 healthy controls using diffusion tensor imaging (DTI) to analyze white matter structure and its relation to language performance.
  • Results showed increased axial diffusivity in RH tracts of aphasic patients, suggesting that the RH may help compensate for language function when LH networks are compromised, with varying correlations based on the extent of LH damage.
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Myotonic dystrophies (DMs) are hereditary, multisystem, slowly progressive myopathies. One of the systems they affect is the CNS. In contrast to the well-established cognitive profile of myotonic dystrophy type 1 (DM1), only a few studies have investigated cognitive dysfunction in individuals with myotonic dystrophy type 2 (DM2), and their findings have been inconsistent.

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Aim to examine the severity of executive dysfunction among different Parkinson's disease (PD)-mild cognitive impairment (MCI) subtypes in the early stages of the disease. The final sample consisted of 65 patients with mild PD progression. Based on neuropsychological measures, our sample was categorized into three PD-MCI subtypes: (1) PD-MCI executive group ( = 24), (2) PD-MCI executive plus memory group ( = 22), and (3) PD-MCI executive plus visuospatial group ( = 19).

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Background: Numerous cross-sectional studies report cognitive impairment in multiple sclerosis (MS), but longitudinal studies with sufficiently long-term follow-up are scarce.

Objective: We aimed to investigate the cognitive 10-year course of a cohort of MS patients.

Methods: 59 patients with clinically isolated syndrome (CIS) or relapsing-remitting (RR) MS were evaluated with Rao's Brief Repeatable Battery of Neuropsychological Tests at baseline and follow-up (at least 10 years later).

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Background: Results from studies to date, regarding the role of chronic pesticide exposure on cognitive function remain contradictory.

Objective: To investigate the relationship between self-reported pesticide exposure and cognitive function.

Methods: Data from a population-based cohort study of older adults (HEllenic Longitudinal Investigation of Aging and Diet) in Greece was used.

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: The modality effect plays the central role in learning and memory functions. Retrieval failure constitutes a common memory impairment that occurs among patients with Parkinson's disease (PD). However, little knowledge exists about the relation between modality effect and delayed recall impairment in PD.

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In this study, we examined the performance of patients with Parkinson's disease (PD) with different cognitive profiles on the Face-Name Associative Memory Examination (FNAME). We evaluated 71 patients with a comprehensive neuropsychological battery. The results revealed that the group with executive and additional visuospatial deficits demonstrated significantly lower scores on FNAME.

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The increasing evidence for a pure amnestic-like profile in multiple sclerosis (MS) introduces the role of hippocampal formation in MS episodic memory function. The aim of the present study was to investigate structural and functional hippocampal changes in mildly-disabled MS patients with and without memory impairment. Thirty-one MS patients with or without memory impairment and 16 healthy controls (HC) underwent MRI in a 3.

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Objective: The Face-Name Associative Memory Examination (FNAME) is a cross-modal associative memory test with a high sensitivity for detecting Alzheimer's disease-related subtle memory problems at an early preclinical stage. The present study examined the psychometric characteristics of a Greek version of the short form of FNAME (GR-FNAME12) to evaluate the contribution of demographic characteristics, report the range of performance within our sample, and estimate regression-based norms in cognitively normal elderly individuals.

Method: In all, 216 cognitively normal elderly individuals were recruited and were administered a version of the short form of the FNAME (GR-FNAME12) that was culture and language specific to Greek-speaking individuals and developed for this study.

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Purpose: Cognitive impairment in multiple sclerosis has been associated with cognitive event-related potentials and MRI abnormalities. This study aims to explore for the first time the association between P300 and MRI in multiple sclerosis.

Methods: Fifty-eight relapsing-remitting patients (41.

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Background: Cognitive impairment (CI) has been associated with numerous magnetic resonance imaging (MRI) indices in multiple sclerosis (MS) patients. In this study we investigated the association of a large set of 2D and 3D MRI markers with cognitive function in MS.

Methods: A sample of 61 RRMS patients (mean age 41.

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The changing hormonal milieu during the menopausal transition may contribute to the development of memory disorders. We aimed to assess the association of sex hormones with memory function in a sample of Greek middle-aged women. This pilot study included 44 women with subjective memory complaints.

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Objective: Pathological laughing and crying (PLC) is common in several neurological and psychiatric diseases and is associated with a distributed network involving the frontal cortex, the brainstem and cortico-pontine-cerebellar circuits. By applying multimodal neuroimaging approach, we examined the neuroanatomical substrate of PLC in a sample of patients with amyotrophic lateral sclerosis (ALS).

Methods: We studied 56 non-demented ALS patients and 25 healthy controls (HC).

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Background And Objectives: Clinicians commonly use verbal and nonverbal measures to test fluency in patients with epilepsy, either during routine cognitive assessment or as part of pre- and postsurgical evaluation. We hypothesized that patients with mesial temporal lobe epilepsy (TLE) with hippocampal sclerosis would perform worse than patients with lateral TLE in both verbal and design fluency.

Methods: We assessed semantic, phonemic, and nonverbal fluency in 49 patients with TLE: 31 with lateral TLE and 18 with mesial TLE plus hippocampal sclerosis.

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The phenotypic heterogeneity in amyotrophic lateral sclerosis (ALS) implies that patients show structural changes within but also beyond the motor cortex and corticospinal tract and furthermore outside the frontal lobes, even if frank dementia is not detected. The aim of the present study was to investigate both gray matter (GM) and white matter (WM) changes in non-demented amyotrophic lateral sclerosis (ALS) patients with or without cognitive impairment (ALS-motor and ALS-plus, respectively). Nineteen ALS-motor, 31 ALS-plus and 25 healthy controls (HC) underwent 3D-T1-weighted and 30-directional diffusion-weighted imaging on a 3 T MRI scanner.

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We aimed to investigate structural changes in vivo in memory-related white matter tracts (i.e., perforant pathway zone [PPZ]; uncinate fasciculus [UF]; fornix) using diffusion tensor tractography and evaluate possible associations with memory performance in nondemented patients with amyotrophic lateral sclerosis (ALS).

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Background: Patients suffering from several neurologic disorders may bear the "stigma" of their disease, being disqualified from full social acceptance. Although stigma is considered to be present in Multiple Sclerosis (MS), the factors that influence its levels are ambiguous. Aim of our study was to examine, for the first time in the literature, the basic determinants of stigma in a Hellenic MS-patients cohort, as well as how stigma affects their Quality-of-Life (QoL) profiles.

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Article Synopsis
  • The study explored cognitive deficits in patients with frontal lobe epilepsy (FLE) to improve preoperative assessments for epilepsy surgery.
  • It involved testing 34 FLE patients, 37 with medial temporal lobe epilepsy (MTLE), and 22 healthy individuals across various cognitive functions, revealing similar performance between FLE and MTLE except for mental flexibility.
  • The findings indicate overlapping cognitive issues between FLE and MTLE, suggesting a need for personalized neuropsychological evaluations and EEG monitoring to differentiate between the two types of epilepsy in a clinical setting.
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Background: There is growing evidence for extramotor dysfunction (EMd) in amyotrophic lateral sclerosis (ALS), with a reported prevalence of up to 52%.

Objective: In the present study, we explore the clinical utility of a brief neuropsychological battery for the investigation of cognitive, behavioral, and language deficits in patients with ALS.

Methods: Thirty-four consecutive ALS patients aged 44-89 years were tested with a brief neuropsychological battery, including executive, behavioral, and language measures.

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