Ataxia in posterior circulation stroke: clinical-MRI correlations. 2011

Cristina Deluca, and Giuseppe Moretto, and Alessandro Di Matteo, and Manuel Cappellari, and Annamaria Basile, and Domenico M Bonifati, and Tiziana Mesiano, and Claudio Baracchini, and Giorgio Meneghetti, and Sara Mazzucco, and Marzia Ottina, and Piergiorgio Lochner, and Agnese Tonon, and Maria A Bonometti, and Antonella De Boni, and Emanuele Turinese, and Nicoletta Freddi, and Alessandro Adami, and Francesca Pizzini, and Giovanni Defazio, and Giampaolo Tomelleri, and Paolo Bovi, and Antonio Fiaschi, and Michele Tinazzi
Department of Neurological and Vision Sciences, University of Verona, Verona, Italy. cristina.deluca@univr.it

OBJECTIVE Ataxia is characterized clinically by four signs (gait and limb ataxia, dysarthria and nystagmus). Although ataxia has been described in posterior circulation (PC) stroke series, there are no prospective studies that have investigated a possible differential role of the cerebellum or its input/outputs in causing ataxia. METHODS Ataxia was semi-quantified according to the International Cooperative Ataxia Rating Scale (ICARS) in 92 consecutive patients with acute PC stroke. Four topographical patterns based on magnetic resonance imaging (MRI) findings were identified: picaCH pattern (posterior inferior cerebellar artery infarct); scaCH pattern (superior cerebellar artery infarct); CH/CP pattern (infarct involving both the cerebellum and the brainstem cerebellar pathways); and CP pattern (infarct involving the brainstem cerebellar pathways). RESULTS Gait ataxia was present in 95.7%, limb ataxia in 76.1%, dysarthria in 56.5% and nystagmus in 65.2% of patients. Gait ataxia frequency did not differ between the patterns, but was significantly more severe in the CH/CP pattern than in either picaCH (P=0.0059) or CP (P=0.0065) pattern. Limb ataxia was significantly less frequent (P<0.001) and less severe (P<0.001) in picaCH pattern than other patterns. Dysarthria was less frequent in picaCH pattern than in other patterns (P=0.018) and less severe than in scaCH (P=0.0043) or CP (P=0.0047) pattern. No differences in nystagmus frequency or severity were observed across all four patterns. CONCLUSIONS In PC stroke gait ataxia was almost always present, regardless of the lesion site. Limb ataxia and dysarthria were less frequent in the picaCH pattern, whereas nystagmus, when present, did not differ among the topographical patterns.

UI MeSH Term Description Entries
D008279 Magnetic Resonance Imaging Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques. Chemical Shift Imaging,MR Tomography,MRI Scans,MRI, Functional,Magnetic Resonance Image,Magnetic Resonance Imaging, Functional,Magnetization Transfer Contrast Imaging,NMR Imaging,NMR Tomography,Tomography, NMR,Tomography, Proton Spin,fMRI,Functional Magnetic Resonance Imaging,Imaging, Chemical Shift,Proton Spin Tomography,Spin Echo Imaging,Steady-State Free Precession MRI,Tomography, MR,Zeugmatography,Chemical Shift Imagings,Echo Imaging, Spin,Echo Imagings, Spin,Functional MRI,Functional MRIs,Image, Magnetic Resonance,Imaging, Magnetic Resonance,Imaging, NMR,Imaging, Spin Echo,Imagings, Chemical Shift,Imagings, Spin Echo,MRI Scan,MRIs, Functional,Magnetic Resonance Images,Resonance Image, Magnetic,Scan, MRI,Scans, MRI,Shift Imaging, Chemical,Shift Imagings, Chemical,Spin Echo Imagings,Steady State Free Precession MRI
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009759 Nystagmus, Pathologic Involuntary movements of the eye that are divided into two types, jerk and pendular. Jerk nystagmus has a slow phase in one direction followed by a corrective fast phase in the opposite direction, and is usually caused by central or peripheral vestibular dysfunction. Pendular nystagmus features oscillations that are of equal velocity in both directions and this condition is often associated with visual loss early in life. (Adams et al., Principles of Neurology, 6th ed, p272) Convergence Nystagmus,Horizontal Nystagmus,Jerk Nystagmus,Pendular Nystagmus,Periodic Alternating Nystagmus,Rotary Nystagmus,See-Saw Nystagmus,Vertical Nystagmus,Conjugate Nystagmus,Dissociated Nystagmus,Fatigable Positional Nystagmus,Multidirectional Nystagmus,Non-Fatigable Positional Nystagmus,Permanent Nystagmus,Rebound Nystagmus,Retraction Nystagmus,Rotational Nystagmus,Spontaneous Ocular Nystagmus,Symptomatic Nystagmus,Temporary Nystagmus,Unidirectional Nystagmus,Non Fatigable Positional Nystagmus,Nystagmus, Conjugate,Nystagmus, Convergence,Nystagmus, Dissociated,Nystagmus, Fatigable Positional,Nystagmus, Horizontal,Nystagmus, Jerk,Nystagmus, Multidirectional,Nystagmus, Non-Fatigable Positional,Nystagmus, Pendular,Nystagmus, Periodic Alternating,Nystagmus, Permanent,Nystagmus, Rebound,Nystagmus, Retraction,Nystagmus, Rotary,Nystagmus, Rotational,Nystagmus, See-Saw,Nystagmus, Spontaneous Ocular,Nystagmus, Symptomatic,Nystagmus, Temporary,Nystagmus, Unidirectional,Nystagmus, Vertical,Ocular Nystagmus, Spontaneous,Pathologic Nystagmus,Positional Nystagmus, Non-Fatigable,See Saw Nystagmus
D002531 Cerebellum The part of brain that lies behind the BRAIN STEM in the posterior base of skull (CRANIAL FOSSA, POSTERIOR). It is also known as the "little brain" with convolutions similar to those of CEREBRAL CORTEX, inner white matter, and deep cerebellar nuclei. Its function is to coordinate voluntary movements, maintain balance, and learn motor skills. Cerebella,Corpus Cerebelli,Parencephalon,Cerebellums,Parencephalons
D004401 Dysarthria Disorders of speech articulation caused by imperfect coordination of pharynx, larynx, tongue, or face muscles. This may result from CRANIAL NERVE DISEASES; NEUROMUSCULAR DISEASES; CEREBELLAR DISEASES; BASAL GANGLIA DISEASES; BRAIN STEM diseases; or diseases of the corticobulbar tracts (see PYRAMIDAL TRACTS). The cortical language centers are intact in this condition. (From Adams et al., Principles of Neurology, 6th ed, p489) Hyperkinetic Dysarthria,Hypokinetic Dysarthria,Scanning Speech,Dysarthosis,Dysarthria, Flaccid,Dysarthria, Guttural,Dysarthria, Mixed,Dysarthria, Scanning,Dysarthria, Spastic,Dysarthoses,Dysarthria, Hyperkinetic,Dysarthria, Hypokinetic,Dysarthrias,Dysarthrias, Flaccid,Dysarthrias, Guttural,Dysarthrias, Hyperkinetic,Dysarthrias, Hypokinetic,Dysarthrias, Mixed,Dysarthrias, Scanning,Dysarthrias, Spastic,Flaccid Dysarthria,Flaccid Dysarthrias,Guttural Dysarthria,Guttural Dysarthrias,Hyperkinetic Dysarthrias,Hypokinetic Dysarthrias,Mixed Dysarthria,Mixed Dysarthrias,Scanning Dysarthria,Scanning Dysarthrias,Scanning Speechs,Spastic Dysarthria,Spastic Dysarthrias,Speechs, Scanning
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001259 Ataxia Impairment of the ability to perform smoothly coordinated voluntary movements. This condition may affect the limbs, trunk, eyes, pharynx, larynx, and other structures. Ataxia may result from impaired sensory or motor function. Sensory ataxia may result from posterior column injury or PERIPHERAL NERVE DISEASES. Motor ataxia may be associated with CEREBELLAR DISEASES; CEREBRAL CORTEX diseases; THALAMIC DISEASES; BASAL GANGLIA DISEASES; injury to the RED NUCLEUS; and other conditions. Coordination Impairment,Dyssynergia,Incoordination,Ataxia, Appendicular,Ataxia, Limb,Ataxia, Motor,Ataxia, Sensory,Ataxia, Truncal,Ataxy,Dyscoordination,Lack of Coordination,Tremor, Rubral,Appendicular Ataxia,Appendicular Ataxias,Ataxias,Ataxias, Appendicular,Ataxias, Limb,Ataxias, Motor,Ataxias, Sensory,Ataxias, Truncal,Coordination Impairments,Coordination Lack,Impairment, Coordination,Impairments, Coordination,Incoordinations,Limb Ataxia,Limb Ataxias,Motor Ataxia,Motor Ataxias,Rubral Tremor,Rubral Tremors,Sensory Ataxia,Sensory Ataxias,Tremors, Rubral,Truncal Ataxia,Truncal Ataxias
D020520 Brain Infarction Tissue NECROSIS in any area of the brain, including the CEREBRAL HEMISPHERES, the CEREBELLUM, and the BRAIN STEM. Brain infarction is the result of a cascade of events initiated by inadequate blood flow through the brain that is followed by HYPOXIA and HYPOGLYCEMIA in brain tissue. Damage may be temporary, permanent, selective or pan-necrosis. Brain Infarct,Venous Infarction, Brain,Anterior Cerebral Circulation Infarction,Anterior Circulation Brain Infarction,Anterior Circulation Infarction, Brain,Brain Infarction, Anterior Circulation,Brain Infarction, Posterior Circulation,Brain Infarction, Venous,Infarction, Anterior Cerebral Circulation,Infarction, Anterior Circulation, Brain,Infarction, Brain, Anterior Circulation,Infarction, Brain, Posterior Circulation,Infarction, Posterior Circulation, Brain,Posterior Circulation Brain Infarction,Posterior Circulation Infarction, Brain,Brain Infarctions,Brain Infarctions, Venous,Brain Infarcts,Brain Venous Infarction,Brain Venous Infarctions,Infarct, Brain,Infarction, Brain,Infarction, Brain Venous,Infarction, Venous Brain,Infarctions, Brain,Infarctions, Brain Venous,Infarctions, Venous Brain,Infarcts, Brain,Venous Brain Infarction,Venous Brain Infarctions,Venous Infarctions, Brain

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