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A 52-year-old woman with beading of intracranial arteries

A 52-year-old woman of Indian ethnicity with a history of well-controlled hypertension, hyperlipidaemia and recurrent transient ischaemic attacks presented with altered mentation and slurred...

Creutzfeldt-Jakob Disease Presenting with Visual Blurring, Diplopia and Visual Loss: Heidenhain’s Variant

The electroencephalographic pattern is distinctive in many but not in all patients with Creutzfeldt-Jakob disease (CJD). Often, it is one of diffuse and non-specific...

The Profile of Hospitalised Patients with Parkinson’s Disease

Prevalence studies in various parts of the world have shown that Parkinson’s disease (PD) is relatively common among the aged in all countries. Crude...

The Alien Hand Sign–Case Report and Review of the Literature

The alien hand sign or “strange hand sign”, first coined by Brion and Jedynak in 1972, refers to a feeling that the hand is...

Electrophysiological Features in the Management of Meralgia Paraesthetica

Meralgia paraesthetica is a condition resulting from entrapment of the lateral femoral cutaneous nerve at the region of the anterior superior iliac spine, when...

A Retrospective Review of Patients with Clinically Definite Multiple Sclerosis

Genetic susceptibility and environmental factors influence the prevalence and clinical manifestations of multiple sclerosis (MS). Since MS is rare in Southeast Asia, descriptions of...

Plasma Vitamins A, C and E in the General Population of Singapore, 1993 to 1995

The current disease pattern in Singapore (an island state of 3.3 million people composed of 76% Chinese, 14% Malays, 7% Asian Indians and 3%...

Chronic Subdural Haematoma Presenting with Transient Ischaemic Attacks— A Case Report

Transient ischaemic attacks (TIA) are commonly seen in neurologic practice. They are most commonly associated with cerebrovascular insufficiency, either from a thrombotic or embolic...

Palatal Myoclonus—A Case Report

Palatal myoclonus is a rare movement disorder characterised by rhythmic recurring jerky movements of the soft palate, pharynx, larynx and rarely diaphragm, trunk and...

Potentiation of Acetylcholine-induced Smooth Muscle Contraction in Rat Ileum by Lead

It is known that exposure of animals and humans to heavy metals such as lead can result in neurological dysfunction. Pharmacodynamic effects of lead...

Measurement of Obesity by Anthropometry and Bioelectric Impedance Analysis: Correlation with Fasting Lipids and Insulin Resistance in an Asian Population

Obesity is a risk factor for cardiovascular disease. This risk is partially mediated by the correlation between obesity and other coronary artery disease risk...

1998 Runme Shaw Memorial Lecture: Somatic Evolution of Cancer

The interpretation of cancer as a somatic evolutionary process involving genetic mutation followed by selection, goes back to the early years of this century....

Extensor Pollicis Longus Paralysis Following Thoracoscopic Sympathectomy

A 24-year-old man was referred for hyperhidrosis of more than 15 years duration. It affected both hands, feet and axilla. This article is available only...

Role of Magnetic Resonance Imaging and Magnetic Resonance Angiography in Patients with Hemifacial Spasm

Hemifacial spasm (HFS), characterized by intermittent twitching of muscles supplied by one facial nerve is commonly due to compression of the facial nerve by...

The Reliability and Validity of the Alzheimer’s Disease Assessment Scale Cognitive Subscale (ADAS-Cog) among the Elderly Chinese in Hong Kong

The Alzheimer’s Disease Assessment Scale (ADAS) is a 21-item scale designed to assess the severity of cognitive and non-cognitive impairment in patients with Alzheimer’s...

The Current State of Multiple Sclerosis Genetic Research

It was Charcot (1868) who first made the formal pathological correlation between lesions in the central nervous system (CNS) and a disorder termed, ‘la...

The Genetics of Human Epilepsies

Epilepsies are one of the most common neurological disorders, affecting about 3% of individuals at least once in a lifetime. It thus represents a...

Sleep/Wake Cycle and Circadian Disturbances in Shift Work: Strategies for Their Management—A Review

Humans have primarily been active/awake during the day and inactive/asleep at night. The discovery of artificial light and introduction of electric power generator have...

Incidence and risk factors of delirium in post-anaesthesia care unit

Post-anaesthesia care unit (PACU) delirium is defined as a disorder in thought processes that affect cognition in terms of memory, comprehension and attention.1 It...

Delirium in patients following general anaesthesia

Delirium is a disturbance of consciousness characterised by an acute onset and fluctuating course of inattention, accompanied by either a change in cognition or...

Listeria Meningoencephalitis: Two Cases and a Review of the Literature

The general experience of local physicians and available data suggest that listerial infections of the central nervous system (CNS) are uncommon among adults in...

Panhypopituitarism due to Pituitary Cyst of Rathke’s Cleft Origin—Two Case Reports

Rathke’s cleft cysts are non-neoplastic cystic epithelial lesions of the sellar and suprasellar region which are thought to originate from the remnants of Rathke’s...

Body Mass Index Profile in Hong Kong Chinese Adults

Obesity is considered a chronic disease and not just a social stigma due to the associated morbidity and early mortality. Obesity has now become...

Book Review

The above is a textbook of medicine written by Singapore doctors and published in Singapore. It is difficult not to be over-enthusiastic about it...

Advances in Neurointensive Care

Neurointensive care has come into being in the past decade as a recognised subspecialty. Pioneering neurointensivists in the United States, such as Allan Ropper...

The Eye in Neurology: Evaluation of Sudden Visual Loss and Diplopia—Diagnostic Pointers and Pitfalls

The first step in the evaluation of sudden visual loss is to determine if the visual loss is monocular or binocular. The first diagnostic...

Neuroprotection in Acute Stroke

The neuronal cells of the central nervous system are especially susceptible to various forms of insult such as trauma and ischaemia. Once the ischaemic...

Current and Emerging Treatments in Parkinson’s Disease

Parkinson’s disease (PD) affects 1% of adults above the age of 65 years. It is characterised histologically by the loss of neurons in the...

Trinucleotide Repeat Analysis of Huntington’s Disease gene in Singapore

Huntington’s disease (HD) is an autosomal dominantly inherited disease, affecting 1 in 10,000 individuals of European origin. The incidence in the Asian population is...

Aseptic Meningitis in Children—The Singapore Experience

Aseptic meningitis is a common diagnosis among infants admitted for fever without an obvious source. In cases where the aetiologic agent could be identified,...

Update in the Management of Stroke

Stroke is the fourth leading cause of death and a leading cause of morbidity in Singapore. The number of hospital admissions for cerebrovascular disorders...

Stroke Disease Management—A Framework for Comprehensive Stroke Care

Disease management (DM) is an approach to patient care that coordinates medical resources for patients across the entire healthcare delivery system. It requires a...

Variance Analysis Applied to a Stroke Pathway: How This Can Improve Efficiency of Healthcare Delivery

Stroke is the fourth principal cause of death in Singapore, and the leading cause of long-term disability amongst developed countries. Due to the spiralling...

Allopurinol Hypersensitivity Syndrome and Acute Myocardial Infarction—Two Case Reports

Allopurinol hypersensitivity syndrome is an idiosyncratic drug reaction characterised by an acute and severe multiorgan disease. It usually begins 2 to 6 weeks (up...

Seeing How We Think About Words Using BOLD Contrast fMR Imaging

Functional brain imaging refers to a set of non-invasive imaging techniques that are used to infer linkages between brain structure and function. In this...

Measuring Quality of Life in Chinese Cancer Patients: A New Version of the Functional Living Index for Cancer (Chinese)

Health-related quality of life (QOL) is recognised as an important aspect of patient care. In oncology studies, it may stand as the primary end-point....

Nipah Encephalitis Outbreak in Malaysia

From September 1998 to June 1999, there was an outbreak of viral encephalitis in several pig farming villages in Malaysia. The outbreak, which started...

MELAS: A Case Report

A 6-year-old Chinese boy presented at the Oral and Maxillofacial Surgery clinic with gingival bleeding due to poor oral hygiene, odontogenic pain due to...

Case Reports of Two Biopsy-proven Patients with Creutzfeldt-Jakob Disease in Singapore

Creutzfeldt-Jakob disease (CJD) is the commonest human transmissible subacute spongiform encephalopathy. It has a worldwide distribution with an estimated annual incidence of 0.5 to...

Axoglial Interaction via the Notch Receptor in Oligodendrocyte Differentiation

Oligodendrocytes (OLs) derived from the common neural progenitor cells in the central nervous system (CNS) ensheathe the nude axon to form the myelin that...

Hemifacial Spasm in Singapore: Clinical Characteristics and Patients’ Perceptions

Hemifacial spasm (HFS) is a movement disorder characterised by intermittent involuntary contractions of the facial muscles. It begins with contractions of the orbicularis oculi,...

Characteristics and Acute Rehabilitation of Guillain-Barré Syndrome in Singapore

The Guillain-Barré syndrome (GBS) is an acute, frequently severe evolution of a demyelinating inflammatory polyradiculopathy with an autoimmune pathogenesis. In developed countries, GBS is...

Clinical Indications for Positron Emission Tomography (PET) Scanning

The purpose of these guidelines is to provide a broad framework for clinicians considering the use of positron emission tomography (PET) scanning for their...

Positron Emission Tomography – A Vital Component of Molecular Imaging

Contemporary medical imaging is progressing towards quantification of tissue function in addition to merely providing anatomical information, as illustrated by the rising use of...

Spinocerebellar Ataxia Type 2 with Focal Epilepsy – An Unusual Association

The spinocerebellar ataxias (SCAs) are a rare group of neurodegenerative disorders that are clinically and genetically heterogeneous. Almost all SCAs are due to trinucleotide...

The Epidemiology of Myopia in Hong Kong

Myopia is a refractive condition in which the image of a distant object is formed anterior to the retina of the unaccommodated (relaxed) eye....

Neural Progenitor and Stem Cells in the Adult Central Nervous System

Seminal studies in the 1960s, using -thymidine autoradiography, reported that neurogenesis occurs in discrete areas of the adult mammalian brain, in rodents. Studies in...

Concurrent Intermediate Uveitis and an Enhancing Intracranial Lesion as the Initial Manifestation of Sarcoidosis

Sarcoidosis remains an enigmatic disease with protean manifestations. It is a multi-system disorder of unknown cause characterised by an accumulation of T-lymphocytes, mononuclear phagocytes...

Clinical Assessment of Absence of the Palmaris Longus and its Association With Other Anatomical Anomalies – A Chinese Population Study

The prevalence of absence of the palmaris longus (PL) has been extensively studied following the first report of its absence in 1559 by Colombos...

Re-defining Neurological Syndromes: The Genotype Meets the Phenotype

Since time immemorial, generations of medical students and physicians have always been taught that a thorough and detailed history and examination is the foundation...

Ultrasound Assisted Thrombolysis in Acute Ischaemic Stroke: Preliminary Experience in Singapore

Most patients with acute ischaemic stroke have arterial thrombi that occlude extra- or intracranial vessels. Intravenously administered tissue plasminogen activator (IV-TPA) induces thrombolysis and...

Functional Neuroimaging of Sleep Deprived Healthy Volunteers and Persons with Sleep Disorders: A Brief Review

Most adults have experienced sleep deprivation at some stage of their lives, be it in the context of work, illness or play. Sleep deprivation...

Treatment of Circadian Rhythm Sleep Disorders with Light

In humans, the daily pattern of consolidated sleep and wake is strongly influenced by the timing of exposure to light and darkness. In the...

Basic Science Review on Circadian Rhythm Biology and Circadian Sleep Disorders

The sleep-wake cycle, with its characteristic intervals of activity alternating with restfulness that recur with a periodicity approximating the 24-hour day-night cycle, is the...

Delayed and Extra-pontine Myelinolysis after Osmotic Dysregulation

A 58-year-old Chinese man was admitted because of increasing lethargy and confusion over 4 days. He had been taking hydrochlorthiazide for hypertension and regularly...

Limb-Shaking Transient Ischemic Attack with Distal Micro-Embolic Signals and Impaired Cerebrovascular Reactivity Using Transcranial Doppler

We present a patient with limb-shaking transient ischaemic attack (TIA) associated with extracranial carotid occlusion and suggest that the pathophysiological mechanism is hypoperfusion, as...

Neuropsychiatry – An Emerging Field

Neuropsychiatry can be described as the interface between neurology and psychiatry – the intersecting field of enquiry for both the brain and the mind....

Alzheimer’s Disease – Towards More Patient-centred and Meaningful Clinical Outcomes

More than 100 years ago Alois Alzheimer first presented the clinical and pathological features of an unusual brain disease at his seminal lecture in...

Sir Gordon Arthur Ransome (1910-1978) – His Teaching Style and His Legacy

Sir Gordon Arthur Ransome was born in Salop, England, in 1910.1 He came to Singapore in 1938, where he taught and practised medicine for...

Corticospinal Tract Degeneration in Amyotrophic Lateral Sclerosis: A Diffusion Tensor Imaging and Fibre Tractography Study

Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disorder characterised by spinal and cortical motor neuron degeneration. Although electro myography, muscle biopsy and motor...

Biomarkers of Mild Cognitive Impairment and Alzheimer’s Disease

Alzheimer’s disease (AD) is the most prevalent form of age-related dementia in the modern society. Other than symptomatic treatment with acetylcholinesterase inhibitors at its...

Validation of Transcranial Doppler with CT Angiography in Cerebral Ischaemia: A Preliminary Pilot Study in Singapore

Transcranial Doppler (TCD) is routinely performed to assess the blood flow in patients with cerebral ischaemia and provides important real-time information about cerebral haemodynamics....

Superior Sagittal Sinus Thrombosis: Subtle Signs on Neuroimaging

Cerebral venous thrombosis (CVT) is an infrequent but potentially deadly disease. The mortality rate of CVT is 10% to 20%, and surviving patients may...

Embryonic Stem Cells and Parkinson’s Disease: Cell Transplantation to Cell Therapy

Although levodopa is currently a well-endorsed form of treatment for Parkinson’s Disease (PD), the search for a safe, long-term and dyskinesia-free treatment remains an...

Bridging the Gap Between Primary and Specialist Care – An Integrative Model for Stroke

Cerebrovascular disease (CVD) is Singapore’s fourth leading cause of death, comprising 9% of all deaths, a crude death rate of 40.4/100,000, an age- and...

Malignant Syndrome of Two Parkinson Patients due to Withdrawal of Drugs

Neuroleptic malignant syndrome (NMS) is characterised by the impairment of consciousness, high fever, rigidity and autonomic instability. Although originally described in patients taking neuroleptic...

Multimodal Therapeutic Approach in Acute Ischaemic Stroke with Real-time Neurovascular Monitoring

Intravenously administered tissue plasminogen activator (IV-TPA) induces thrombolysis and remains the only FDA-approved therapy for acute ischaemic stroke (IS) within the therapeutic time-window according...

Chewing-induced Facial Dystonia

Dystonia is a movement disorder characterised by sustained muscle contractions, repetitive twisting movements, and abnormal postures of the trunk, neck, face, or arms and...

Bannayan Riley Ruvalcaba Syndrome

Bannayan-Riley-Ruvalcaba syndrome (BRRS) classically presents with macrocephaly, subcutaneous and visceral lipomata, haemangiomata, hamartomatous intestinal polyps and pigmented macules involving the genitalia. This autosomal dominant...

Timing of Arrival to a Tertiary Hospital after Acute Ischaemic Stroke – A Follow-up Survey 5 Years Later

Intravenous tPA is a proven treatment for acute ischaemic stroke. However as it has to be given in a narrow time window from symptom...

Alzheimer’s disease–The Inexorable Epidemic

Alzheimer's disease (AD) is the most common form of dementia which refers collectively to syndromes of progressive deterioration of memory along with other cognitive...

Unusual Cause for Unilateral Headache: A Quadrigeminal Cistern Arachnoid Cyst

Young adults are frequently presented with headaches due to various causes. Atypical facial pain, renamed as persistent idiopathic facial pain (PIFP) is a poorly...

Genome-wide Association Studies: Promises and Pitfalls

Genetic testing is an important means to confirm the diagnosis of an inheritable disease. For this to be feasible, genes that are associated with...

Epilepsy: Looking Beyond Seizures

World Epilepsy Day falls on 26 March 2013. As we observe this important date in Singapore, it is perhaps instructive to take a step...

Sleep, Public Health and Wellness: The Elephant in the Room

The rising cost of health care and the burden of chronic illness are perennial concerns. Remarkably, there exists a measure that around 30% of...

Single-level Anterior Corpectomy with Fusion versus 2-level Anterior Cervical Decompression with Fusion: A Prospective Controlled Study with 2-year Follow-up Using Cages for Fusion

Anterior cervical discectomy and fusion (ACDF) and anterior cervical corpectomy and fusion (ACCF) are performed for decompression of the spine when the primary compressive...

Chorea precipitated by phototherapy as initial presentation of systemic lupus erythematosus

Dear Editor, Chorea is a well-recognised albeit rare neuropsychiatric manifestation of systemic lupus erythematosus (SLE). We describe here a case of a 67-year-old woman presenting...

Attendance for ischaemic stroke before and during COVID-19 lockdown in Singapore

The coronavirus disease 2019 (COVID-19) outbreak has impacted healthcare systems worldwide. Globally, visits to the emergency department have fallen as much as 25% during...

Rare homozygous PRKN exon 8 and 9 deletion in Malay familial early-onset Parkinson’s disease

Little is known about the genetics of Parkinson’s disease (PD) in Southeast Asian populations.1 We extended knowledge of the Southeast Asian monogenic PD landscape...

Neuro-Behçet’s disease presenting as isolated intracranial hypertension

Behçet’s disease (BD) is a chronic multisystem inflammatory disease with a classic triad of painful oral ulcers, genital ulcers and uveitis. Neurological manifestations, though...

Cost of inpatient rehabilitation for children with moderate to severe traumatic brain injury

The cost of rehabilitation for children post-traumatic brain injury (TBI) is significant. The annual total healthcare cost of TBI had been estimated to range...

Long-term outcomes of ischaemic stroke patients with diabetes in a multi-ethnic cohort in Singapore

Asia faces an epidemic of diabetes. The prevalence of diabetes in Asia is projected to grow from 114 million in 2007 to 180 million...

Recurrent vascular events in ischaemic stroke patients with diabetes

Stroke is a major cause of death and disability globally, with 6.55 million deaths (95% uncertainty interval 6.00–7.02 million), 101 million prevalent cases...

The Singapore Cerebral Palsy Registry: An important new resource for cerebral palsy research

Cerebral palsy (CP) is a common, lifelong disorder of movement and posture resulting from an insult or maldevelopment of the developing brain. The movement...