Development of the AL-O-A Score for Delirium Screening in Acute Internal Medicine: a Monocentric Prospective Study.

BACKGROUND: Delirium occurs frequently in acute internal medicine wards and may worsen the patient's prognosis; it deserves a fast, systematic screening tool. OBJECTIVE: Develop a delirium screening score for inpatients admitted to acute internal medicine wards. DESIGN: A monocentric prospective study between November 2019 and January 2020. PARTICIPANTS: Two hundred and seventeen adult inpatients. MAIN MEASURES: Within 48 h of hospital admission, physicians administered an index test to participants which explored potential predictors associated with the fluctuation of mental state, inattention, disorganised thinking and altered level of consciousness. On the same day, patients underwent a neuropsychological evaluation (reference standard) to assess for delirium. The score was constructed using a backward stepwise logistic regression strategy. Areas under the receiver operating curves (AUC) and calibration curves were drawn to calculate the score's performance. The score was tested on subgroups determined by age, sex and cognitive status. RESULTS: The AL-O-A score ("abnormal or fluctuating ALertness, temporospatial Orientation and off-target Answers") showed excellent apparent (AUC 0.95 (95% CI 0.91-0.99)) and optimism-corrected discrimination (AUC 0.92 (95% CI 0.89-0.96)). It performed equally well in subgroups with and without cognitive impairment (AUC 0.93 (95% CI 0.88-0.99) vs 0.92 (95% CI 0.80-0.99)); in men and women (AUC 0.96 (95% CI 0.94-0.99) vs 0.95 (95% CI 0.89-0.99)); and in patients younger and older than 75 years old (AUC 0.98 (95% CI 0.95-0.99) vs 0.93 (95% CI 0.87-0.99)). CONCLUSIONS: A simple, 1-min screening test (AL-O-A score), even administered by an untrained professional, can identify delirium in internal medicine patients.

[Management of related contact sport mTBI]. / Prise en charge des traumatismes craniocérébraux simples dans les sports de contact.

Sports and hobbies are important cause of accident and the incidence of reported traumatic brain injury is about 10 000 case/years in Switzerland. Hockey and handball are very high-risk contact sports. The term «â€…mild traumatic brain injury ¼ (mTBI) involves a patient with an initial Glasgow coma scale between 13 and 15. Signs and symptoms are variable and non-specific. They extend to loss of consciousness to neurocognitive disorders. TBI are potentially life threatening. Therefore, their management must be fast and effective in the emergency department. Long-term complications are also frequent and caregivers have to identify and support the patients who are at risk to develop post-concussion syndrome. Multidisciplinary supportive care and decision-making related to return to sport are necessary.

Les loisirs constituent un risque accidentel, notamment de traumatisme craniocérébral (TCC). L'incidence de cas signalés avoisine les 10 000 cas/année en Suisse. Parmi les sports de contact, le hockey et le handball sont associés au plus haut risque. Le terme TCC simple regroupe les patients présentant un score de Glasgow initial de 13 à 15. Les signes et symptômes sont variables et non spécifiques, allant de la perte de connaissance à des déficits cognitifs. Les TCC sont potentiellement graves et parfois mortels, raison pour laquelle la prise en charge doit être rapide et efficace pour détecter les lésions graves. Les TCC simples peuvent également se compliquer à moyen terme d'un syndrome post-commotionnel. Les populations à risque doivent être détectées et suivies dans leur reprise du sport selon les recommandations spécifiques.

Dissociable components of spatial neglect associated with frontal and parietal lesions.

Spatial neglect is a complex neuropsychological disorder, in which patients fail to detect and respond to contralesional stimuli. Recent studies suggest that these symptoms may reflect a combination of different component deficits, associated with different lesion substrates. Thus, damage to right lateral prefrontal and inferior parietal regions produce different degrees of left neglect on cancellation and line bisection tasks, respectively. Here we tested for dissociable behaviors across two tasks designed to assess distinct cognitive processes possibly mediating such components, in 14 patients with right focal lesion in either the frontal or parietal lobe. In the "distractor filtering" task, patients had to respond to a visual target presented centrally, with or without a lateralized distractor. Only frontal-lesioned patients showed a marked slowing of reaction times when a central target appeared with a simultaneous right distractor (compared to center and left distractor). In the "spatial coding" task, patients had to detect a target among successive visual stimuli presented horizontally with three sequence conditions (regular/predictive or irregular/non-predictive). Only parietal-lesioned patients were unable to benefit from the predictability of the target position, with similar reaction times across all sequence conditions. By contrast, frontal patients showed faster reaction times on trials with a regular succession of stimuli (compared to random order). Taken together, these results suggest that frontal damage may contribute to left inattention by disrupting top-down control and resistance to distractors on the ipsilesional side, whereas parietal damage may disrupt the maintenance of stable locations in space across gaze shifts or time. This further supports the notion that left neglect may arise as a combined breakdown or impaired connectivity between frontal and parietal mechanisms involved (respectively) in the selective control and memory storage components of spatial attention.

Neuroanatomy of hemispatial neglect and its functional components: a study using voxel-based lesion-symptom mapping.

Spatial neglect is a perplexing neuropsychological syndrome, in which patients fail to detect (and/or respond to) stimuli located contralaterally to their (most often right) hemispheric lesion. Neglect is characterized by a wide heterogeneity, and a role for multiple components has been suggested, but the exact nature of the critical components remains unclear. Moreover, many different lesion sites have been reported, leading to enduring controversies about the relative contribution of different cortical and/or subcortical brain regions. Here we report a systematic anatomo-functional study of 80 patients with a focal right hemisphere stroke, who were examined by a series of neuropsychological tests assessing different clinical manifestations of neglect. We first performed a statistical factorial analysis of their behavioural performance across all tests, in order to break down neglect symptoms into coherent profiles of co-varying deficits. We then examined the neural correlates of these distinct neglect profiles using a statistical voxel-based lesion-symptom mapping method that correlated the anatomical extent of brain damage with the relative severity of deficits along the different profiles in each patient. Our factorial analysis revealed three main factors explaining 82% of the total variance across all neglect tests, which suggested distinct components related to perceptive/visuo-spatial, exploratory/visuo-motor, and allocentric/object-centred aspects of spatial neglect. Our anatomical voxel-based lesion-symptom mapping analysis pointed to specific neural correlates for each of these components, including the right inferior parietal lobule for the perceptive/visuo-spatial component, the right dorsolateral prefrontal cortex for the exploratory/visuo-motor component, and deep temporal lobe regions for the allocentric/object-centred component. By contrast, standard anatomical overlap analysis indicated that subcortical damage to paraventricular white matter tracts was associated with severe neglect encompassing several tests. Taken together, our results provide new support to the view that the clinical manifestations of hemispatial neglect might reflect a combination of distinct components affecting different domains of spatial cognition, and that intra-hemispheric disconnection due to white matter lesions might produce severe neglect by impacting on more than one functional domain.

Abnormal attentional modulation of retinotopic cortex in parietal patients with spatial neglect.

Brain regions beyond visual cortex are thought to be responsible for attention-related modulation of visual processing [1, 2], but most evidence is indirect. Here, we applied functional magnetic resonance imaging (fMRI), including retinotopic mapping of visual areas, to patients with focal right-parietal lesions and left spatial neglect [3, 4]. When attentional load at fixation was minimal, retinotopic areas in right visual cortex showed preserved responses to task-irrelevant checkerboards in the contralateral left hemifield, analogously to left visual cortex for right-hemifield checkerboards, indicating a "symmetric" pattern in both hemispheres with respect to contralateral stimulation under these conditions. But when attentional load at fixation was increased, a functional asymmetry emerged for visual cortex, with contralateral responses in right visual areas being pathologically reduced (even eliminated for right V4/TEO), whereas left visual areas showed no such reduction in their contralateral response. These results reveal attention-dependent abnormalities in visual cortex after lesions in distant (parietal) regions. This may explain otherwise puzzling aspects of neglect [5, 6], as confirmed here by additional behavioral testing.