Geriatrics Flashcards
What is the definition of an Ischaemic stroke?
A sudden onset focal or global neurological deficit of vascular aetiology which lasts more than >24 hours or leads to death(or with evidence of infarction on imaging).
What are the main causes of an Ischaemic Stroke?
- Large Vessel Atherosclerosis (50%)
- Intracranial small vessel atherosclerosis (25%)
- Cardio-embolic (AF) (20%)
What are the risk factors for an ischaemic stroke?
- older age
- male sex
- family history of ischaemic stroke
- Previous stroke or TIA
- hypertension
- smoking
- diabetes mellitus
- atrial fibrillation.
Weaker risk factors: hypercholesterolaemia, obesity, poor diet, oestrogen-containing therapy, and migraine
What are the clinical features of a stroke?
- Limb weakness
- Facial weakness
- Dysphasia (speech disturbance)
- Visual field defects
- Sensory loss
- Ataxia and vertigo (posterior circulation infarction)
Stroke symptoms are usually asymmetrical
What is the first line investigation for someone presenting with a stroke?
Non-contrast Head CT Scan with 1 hour of attending hospital
(very sensitive to haemmorhagic, but will appear normal in the first few hours of an ischaemic stroke)
What is the most sensitive test for confirming an ischamic stroke?
Diffusion Weighted MRI
Only done if the diagnosis is unclear
What are some post-acute ischaemic stroke investigations?
- Bloods (Glucose, TFTs)
- Carotid ultrasound (critical carotid artery stenosis)
- ECG (for Atrial Fibrillation)
- CT/MR angiography (intracranial and extracranial stenosis)
- Echocardiogram (if a cardio-embolic source is suspected)
- Vasculitis and Thrombophilia screens (in young patients)
What are some post-acute Haemmorhagic stroke investigations?
Serum toxicology screen
(sympathomimetic drugs (e.g. cocaine) are a strong risk factor)
What is the acute management of an ischaemic stroke?
Once a head CT has ruled out haemorrhage:
Thrombolysis with Alteplase (tissue plasminogen activator) if patients present within 4.5 hrs of symptom onset. (Assuming there are no contraindications)
Mechanical Thrombectomy in patients with an anterior circulation stroke (+ selected posterior circulation strokes) providing they have good baseline function.
- Procedure must begin within 5 hours of known onset
- Must be a proximal intracranial large vessel occlusion
300mg Aspirin for 2 weeks started immediately if thrombolysis not offered. Or 24hrs after thrombolysis.
Give some contraindications for thrombolysis
- Recent head trauma
- GI or intracranial haemorrhage
- Recent surgery
- Clotting disorders
- Acceptable BP, platelet count, and INR
HALTSS
What are the key steps for secondary stroke prevention?
- Hypertension - Anti-hypertensive therapy should be initiated 2 weeks post-stroke.
- Antiplatelet therapy - Clopidogrel (75 mg once daily) or warfarin (in patients with a stroke secondary to AF); started 2 weeks post-stroke.
- Lipid-lowering therapy - High dose Atorvastatin (20-80mg) once nightly.
- Tobacco - smoking cessation
- Sugar - Diabetes Screen
- Surgery - Carotid endarterectomy in patients with ipsilateral carotid artery stenosis
What are some stroke differential diagnoses?
- Hypoglycaemia
- Drugs / Alcohol
- Seizure
- Migraine
- Bell’s Palsy
- Tumour / Space occupying lesion
- Meningitis / Encephalitis
What is a Total Anterior Circulation Infarct (TACI) defined by?
- Contralateral hemiplegia or hemiparesis, AND
- Contralateral homonymous hemianopia, AND
- Higher cerebral dysfunction (e.g. aphasia, neglect)
A TACI involves the anterior AND middle cerebral arteries on the affected side.
What is a Partial Anterior Circulation Infarct (PACI) defined by?
- 2 of the factors for a TACI OR
- Higher cerebral dysfunction alone.
A PACI involves the anterior OR middle cerebral artery on the affected side.
What is a Posterior Circulation Infarct (POCI) defined by?
- Cerebellar dysfunction, OR
- Conjugate eye movement disorder, OR
- Bilateral motor/sensory deficit, OR
- Ipsilateral cranial nerve palsy with contralateral motor/sensory deficit, OR
- Cortical blindness/isolated hemianopia.
A POCI involves the vertebrobasilar arteries and associated branches (supplying the cerebellum, brainstem, and occipital lobe).
What is a Lacunar Infarct defined by?
involves perforating arteries around the internal capsule, thalamus and basal ganglia
presents with 1 of the following:
1. unilateral weakness (and/or sensory deficit) of face and arm, arm and leg or all three.
2. pure sensory stroke.
3. ataxic hemiparesis
What are the 4 Posterior Stroke Syndromes?
- Basillar Artery Occlusion - Causes locked in syndrome, loss of consciousness or sudden death
- Wallenberg’s syndrome (lateral medullary syndrome)
- Lateral pontine syndrome - Caused by occlusion of the anterior inferior cerebellar artery
- Weber’s syndrome/ Medial Midbrain Syndrome - Caused by occlusion of the paramedian branches of the upper basilar and proximal posterior cerebral arteries
Define Locked in Syndrome
It’s Quadriparesis with preserved consciousness and ocular movements.
Its caused by Basillar Artery Occlusion
What is the clinical presentation of Lateral Pontine Syndrome?
Symptoms are similar to Wallenberg’s (see above), but:
Ipsilateral: facial paralysis and deafness
What is the clinical presentation of Weber’s Syndrome?
It causes an ipsilateral oculomotor nerve palsy and contralateral hemiparesis.
What is the definition of a Haemorrhagic Stroke?
A cerebrovascular event that occurs when the wall of a blood vessel in the brain weakens and ruptures.
This rupture causes bleeding in the brain, leading to haematoma formation and consequently neuronal injury.
What is the clinical presentation of a Sub-arachnoid Haemmorhage?
- Severe “Thunderclap” Headache
- Vomiting
- May have seizures
- May have loss of consciousness
- May have CN3 and CN6 Nerve palsy
Meningitis Mimics:
- Neck Stiffness and Photophobia
- Kernig’s sign
- Brudinski’s sign
What are the risk factors for a haemorrhagic stroke?
- Age
- Male sex
- Family history of haemorrhagic stroke
- Haemophilia
- Cerebral amyloid angiopathy/hypertension
- Anticoagulation therapy
- Illicit sympathomimetic drugs (e.g. cocaine and amphetamines)
- Vascular malformations (younger patients)
Weaker RFs include: NSAIDs, Heavy alcohol use and
Thrombocytopenia
What is the epidemiology of haemorrhagic strokes?
They make up 15% of all strokes (the other 85% being ischaemic)
- Increasing prevalence with age
- More common in men
- Intra-cerebral haemorrhages more common in Asians.
Three quarters are intra-cerebral haemmorhages and the rest are sub-arachnoid.
What are the causes of a Haemorrhagic Stroke?
- Cerebral Amyloid Amyopathy (CAA): where beta peptide deposits in the walls of small blood vessels making them weak.
- Hypertension
- Aneurysms
- Arteriovenous Malformations (AVM)
- Trauma
- Blood thinning medication
What is the clinical presentation of Wallenberg’s Syndrome?
- Ipsilateral: facial pain and temperature loss
- Contralateral: limb/torso pain and temperature loss
- Ataxia, nystagmus
Describe Kernig’s Sign
The patient is positioned lying on their back with both the hip and knee flexed at 90 degrees.
The examiner then attempts to extend the patient’s knee. If the patient experiences pain and resistance to knee extension, especially when attempting to straighten the leg, it is considered a positive Kernig’s sign.
This sign suggests meningeal irritation or inflammation.
Describe Brudinski’s Sign
The examiner gently flexes the patient’s neck forward toward the chest while the patient is lying on their back.
If the patient involuntarily flexes their hips and knees in response to neck flexion, it is considered a positive Brudzinski’s sign.
What is the general clinical presentation for a haemorrhagic stroke?
- Severe headache
- Altered consciousness, ranging from drowsiness to coma
- Vomiting
- Focal neurologic signs
- Seizures
- Hypertension
What investigations should be done when a haemorrhagic stroke is suspected
Non-Contrast Head CT - Is first line and diagnostic
MRI of the head - Can help identify underlying causes
MR Angiogram or Digital Substraction Angiography - Helps to identify vascular abnormalities that could have caused the bleed
What is the management for a haemorrhagic stroke?
After a head CT:
Surgical:
- Burr Hole Craniotomy (for Subdural haemorrhage)
- Surgical Clipping or endovascular coiling (for Subarachnoid haemorrhage)
Pharmacological
- Hypertensive control
- IV Fluids - To maintain cerebral perfusion
- Nimodipine 60mg for 3/52 (CCB) - Reduces cerebral artery spasm (subarachnoid)
- IV Mannitol - Reduces Intra-cranial pressure (Sub and extradural)
What is the definition of a TIA?
A sudden-onset transient focal neurological deficit with vascular aetiology, where typically, symptoms resolving in less than 1 hour.
It’s caused by focal brain, spinal chord or retinal ischaemia without evidence of acute infarction.
What are the risk factors for a TIA?
- Increased age
- Male sex
- hypertension
- diabetes mellitus
- high cholesterol
- atrial fibrillation and carotid stenosis
- smoking,
- History of past TIAs / Strokes or cardio-embolic events.
- Family history of cardiovascular disease / stroke
What are the clinical features of a TIA?
Sudden onset neurological deficits (Most resolving within 1 hour)
- Speech difficulty (dysphasia)
- Arm or leg weakness
- Sensory changes
- Ataxia, vertigo or loss of balance
- Visual disturbances: Homonymous hemianopia, diplopia or Amaurosis Fungax
What is Amaurosis Fungax?
The sudden painless loss of vision in 1 eye
Caused by an emboli passing into the retinal, ophthalmic or ciliary artery; causing temporary retinal hypoxia.
What are some differential diagnoses for a TIA?
Ischaemic Stroke
Haemorrhagic Stroke
Migraine with Aura
Focal Motor Seizures
What is the main diagnostic investigation for a TIA?
Diffusion Weighted MRI Scan
What other investigations are recommended for a TIA?
- Blood Tests (glucose, lipid profile, clotting factors, LFTs, TFTs, CRP/ESR)
- Carotid Ultrasound
- Echocardiogram (looking for cardiac thrombus)
- ECG looking for AF
- Consider 24 Hour Tape (looking for paroxysmal AF)
What is the management for a TIA?
Immediate assessment (ideally within 24 hrs of symptoms) and referral to the TIA clinic
Lifestyle modification
- Regular exercise
- Smoking cessation
- Healthy Diet
Control of vascular risk factors
- Hypertension (ACE inhibitor (e.g. ramipril), or ARB (e.g. candesartan)
- Diabetes
- Dyslipidaemia (start statin e.g. simvastatin 40mg)
Antiplatlet Therapy
- Immediate Aspirin 300mg
- Patients with a High risk TIA or Low risk stroke (according to NIHSS <4) may be started on Dual antiplatelet Therapy (DAPT)
- Aspirin + Clopidogrel 75mg
No driving until seen by specialist
What is the definition of Benign Paroxysmal Positional Vertigo (BPPV)
Is a condition characterised by sudden, episodic attacks of vertigo induced by changes in head position.
What is the pathophysiology of Benign Paroxysmal Positional Vertigo?
It’s caused by crystals of calcium carbonate called otoconia that become displaced into the semicircular canals.
The crystals disrupt the normal flow of endolymph through the canals, confusing the vestibular system.
Head movement creates the flow of endolymph in the canals, triggering episodes of vertigo.
What are the causes of Benign Paroxysmal Positional Vertigo?
The calcium carbonate crystals can be displaced by:
- viral infection
- head trauma
- ageing
- Idiopathic
What are the clinical features of Benign Paroxysmal Positional Vertigo?
- Vertigo attacks provoked by specific head movements (like turning the head to one side while in bed or looking upwards)
- Episodes of rotational vertigo lasting between 30 seconds to 1 minute
- Recurrent episodes, often resolving naturally over weeks to months before re-occurring wekks-months later
- Patients are asymptomatic between attacks
There is no hearing loss or tinnitus
What are some differential Diagnoses for BPPV?
Meniere’s disease
episodic vertigo, tinnitus, hearing loss, and sensation of fullness in the ear
Vestibular neuritis
sudden onset severe vertigo, nausea, and imbalance lasting for several days
Labyrinthitis: vertigo
hearing loss, and tinnitus
What is the main diagnostic test for BPPV?
What is the observed finding?
The Dix-Hallpike Manoeuvre
- Rapidly lower the patient to the supine position with an extended neck
- A positive test recreates the symptoms of benign paroxysmal positional vertigo
- Rotatory nystagmus
What is the management for BPPV?
The Epley Manouvre
This aims to move the detached otoliths out of the semicircular canal and back to the utricle where they originate.
Vestibular Rehabilitation with Brandt-Daroff exercises can be done by the patient at home
Betahistine medication is often prescribed but has limited effectiveness
What is the definition of Delirium?
It’s an acute and fluctuating disturbance in attention and cognition causing a confusional state.
Often accompanied by a change in consciousness.
It is typically reversible and frequently seen in the elderly.
What is the epidemiology of Delirium?
The prevalence increases with age, severity of illness and the presence of pre-existing cognitive impairment.
What factors may predispose someone to Delirium?
- Old Age
- Underlying Cognitive Impairment (Dementia)
- Previous History of Delirium
- Frailty or multimorbidity
- Polypharmacy
- Sensory Impairment
- Change of Environment
PHONED CHIMPS
What are the main causes of Delirium?
Pain
Hypothermia/Pyrexia
Organ dysfunction (renal or hepatic impairment)
Nutrion
Environmental changes
Drugs and alcohol (OTC, illicit, Anti-cholinergics, Opiates, Anti-convulsants)
Constipation
Hypoxia
Infection
Metabolic disturbance (Electrolyte imbalance, Endocrinological issues, Wernicke’s Encephalopathy)
Polypharmacy
Sleep deprivation
WHERE THE F AM I
What is the clinical presentation of Delirium?
Where: Disorientation
Thought disorganisation
Hallucinations
Energy Changes: Can by hyperactive or hypoactive
Fluctuating
Acute and Altered sleep
Memory problems
Inattention
What are the features of Hyperactive and Hypoactive Delirium?
Hyperactive:
- Agitated
- Hallucinations
- Restless
- Aggressive
Hypoactive:
- Withdrawn/Drowsy/Excessive sleeping
- Calm and Quiet
- Slowness with everyday tasks
- Poor concentration/inattention
- Reduced appetite
Delirium may present as a mixed picture containing features of both or fluctuate between the two. Hypoactive delirium is very hard to pick up
What are some differential diagnoses of Delirium?
- Dementia: Characterized by gradual onset, stable consciousness level, and progressive decline in cognitive function.
- Psychosis: May present with hallucinations and delusions, but usually with preserved orientation and memory.
- Depression: May exhibit poor concentration and slow cognition, but typically with a stable consciousness level and often accompanied by pervasive feelings of sadness or guilt.
- Stroke: Abrupt onset with focal neurologic signs and specific deficits in speech, motor, or sensory function.
What initial investigations should be done for Delirium?
- Comprehensive physical examination and history
- Abbreviated Mental Test Score (AMTS)
- Confusion Screen (including bloods and urinalysis and imaging)
- Imaging (possibly Head CT/MRI, Chest XRay or ultrasound of the abdomen depending on scenario)
- ECG
What tests are involved in a Confusion Screen?
Blood Tests:
- FBC (infection, anaemia, malignancy)
- U&Es (hyponatraemia, hypernatraemia)
- LFTs (liver failure with secondary encephalopathy)
- Coagulation/INR (intracranial bleeding)
- TFTs (hypothyroidism)
- Calcium (hypercalcaemia)
- B12 + folate/haematinics (B12/folate deficiency)
- Glucose (hypoglycaemia/hyperglycaemia)
- Blood cultures (sepsis)
Urinalysis:
- UTI is a very common cause of delirium in the elderly
Imaging Studies:
- CT Head: if concerned about intracranial bleeding, stroke, ischaemia or abscess
- Chest X-ray: If concerned about pneumonia or pulmonary odema
What is the non-pharmacological management of Delirium?
- Providing an environment with good lighting
- Maintaining a regular sleep-wake cycle
- Regular orientation and reassurance
- Ensure patients pain is controlled
- Use same staff
- Put patients in side room where there is less noise
- Ensuring the patient’s glasses and hearing aids are used if needed
What pharmacological management can be used for delirium?
Treat underlying cause of Delirium
Small doses of haloperidol or olanzapine/Lorazepam/Midazolam.
To be used with caution and only in patients who are extremely agitated and present a danger to themselves or others
Give some differences between delirium and dementia?
Delirium
- Acute
- Fluctuant
- Reversible
- Often have sleep disturbance/consciousness fluctuation
- Underlying pathology/cause
Dementia:
- Progressive
- Constant
- Irreversible
- Typically unaltered sleep patterns (in early stages)
- Brain dysfunction
What is Dementia Syndrome?
Decline in memory with impairment of at least one other cognitive function such as skilled movements, language or executive function.
- A progressive condition which usually requires progressive cognitive decline for >6 months to be diagnosed.
What are the main types of Dementia?
- Alzheimer’s Disease (accounts for 60-80% of cases)
- Vascular Dementia
- Lewy Body Dementia
- Fronto-temporal Dementia
- Mixed Dementia
What are some causes of Reversible Dementia?
- Depression
- B12 and Folate Deficiency
- Hypothyroidism
- Normal Pressure Hydrocephalus (NPH)
What is BPSD and give some examples?
Behavioural and Psychological Symptoms of Dementia
- Psychosis: Hallucinations and Delusions
- Excitation: Agitation and Aggression
- Mood Disorders: Depression, Apathy, Emotional withdrawal, Anxiety
What is one of the best non-pharmacological treatments for dementia?
Cognitive Stimulation Therapy
Define Alzheimer’s Disease
Alzheimer’s disease is a chronic, neurodegenerative disorder characterised by the progressive accumulation of abnormal protein deposits, primarily amyloid plaques and tau tangles, in the brain.
This leads to the deterioration of cognitive function, memory loss, and various behavioural and psychological symptoms.
What is the Epidemiology of Alzheimer’s Disease?
Increasing prevalence with age
Women more commonly affected than men
APOE Gene
Alzheimer’s is the most common cause of dementia (>50%)
What is the pathophysiology of Alzheimer’s Disease?
Amyloid Plaques: The accumulation of beta-amyloid protein fragments outside nerve cells in the form of plaques is a hallmark feature. These abnormal protein deposits are believed to disrupt neuronal communication, trigger inflammation, and ultimately lead to cell death.
Tau Tangles: Inside nerve cells, abnormal tau protein accumulates, forming neurofibrillary tangles.
Neuronal Loss and Brain Atrophy: As the disease progresses, significant neuronal loss occurs, particularly in brain regions responsible for memory and cognitive function, such as the hippocampus and the cerebral cortex.
Give some risk factors for Alzheimer’s Disease
Age: Advanced age is the most significant risk factor >65yrs
Genetic Predisposition: apolipoprotein E (APOE) gene, Down’s syndrome
Family History: Having a first-degree relative with Alzheimer’s disease
Cardiovascular Risk Factors: Conditions like hypertension, diabetes, obesity, and hypercholesterolemia
Lifestyle Factors: Physical inactivity, smoking, and a diet high in saturated fats may contribute to increased risk.
Traumatic Brain Injury: A history of head injuries, particularly repeated concussions, has been linked to a higher risk of developing Alzheimer’s disease.
Low Educational Attainment: Lower levels of education may be associated with an increased risk.
What are some clinical features of Alzheimer’s Disease?
Memory Impairment
Language Impairment
Executive Dysfunction - impaired planning, organisation, and activities of tasks
Behavioural Changes
Psychological Symptoms
Disorientation
Loss of Motor Skills
Give some examples of behavioural changes you may see in Alzheimer’s Disease?
Agitation
Aggression
Apathy
Mood swings
Irritability
Give some examples of Psychological symptoms you may see in Alzheimer’s Disease?
Hallucinations
Delusions
Paranoia (in later stages)
What are some differential Diagnoses for Alzheimer’s Disease?
Vascular Dementia
Lewy Body Dementia
Frontotemporal Dementia
Mild Cognitive Impairment (MCI)
Normal Age related Decline
What are some Screening tests for Dementia?
- Six Item Cognitive Impairment Test (6CIT)
- 10-point Cognitive Screener (10-CS)
- Mini-Cog
- General Practitioner Assessment of Cognition (GPCOG)
- Montreal Cognition Assessment (MoCA)
What are the investigations for Dementia?
Screening assessment
Required to exclude physical cause before referral
- Confusion screen (Bloods, Urine, Imaging)
Referral to Memory Clinic
- Addenbrooke’s Cognitive Examination-III (ACE-III)
- < 88/100 suggests possible dementia
What areas are assessed in the Addenbrookes Cognitive Examination III?
- Attention
- Memory
- Language
- Visuospatial function
- Verbal fluency
Scored out 100
- < 88 suggests possible dementia
What are the diagnostic investigations for Alzheimer’s Disease?
Once reversible courses of confusion are eliminated and dementia is still suspected:
- Brain imaging - MRI or PET scanmay show brain atrophy or presence of amyloid plaques
- CSF Analysis may be used to detect specific biomarkers associated with AD
What are some important measures to put in place following a diagnosis of dementia?
- Lasting Power of Attorney
- Advanced decisions
- Planning future care
What is the management of Alzheimer’s Disease?
Non-pharmacological:
- Cognitive Stimulation Therapy
- Psychological interventions
- Activities to promote wellbeing (walking)
- occupational therapy
Pharmacological:
- First line: Acetylcholinesterase inhibitors (rivastigamine, galantamine, and donpezil) in mild-moderate dementia
- Second line: Memantine (NMDA inhibitor) in severe dementia
Treatment of BPSD
- Antidepressants (SSRIs)
- Antipsychotics (risperidone)
- Benzodiazepines (in acute crisis)
There is no curative treatment
Define Vascular Dementia
Vascular dementia is an umbrella term denoting a collection of cognitive impairment syndromes caused by cerebrovascular disease.
These syndromes include stroke-related vascular disease, subcortical vascular dementia, and mixed dementia (a combo of alzheimer’s and vascular)
What is the epidemiology of Vascular Dementia?
Increasing prevalence with age
More common in men
Risk higher in people with cardio risk factors
Its the second most common type of dementia (15-20%)
What are the main causes of vascular dementia?
The primary cause is ischemic or haemorrhagic cerebrovascular disease, which leads to brain damage.
Various different vascular events or conditions can lead to vascular dementia including:
- multi-infarct and single-infarct dementia
- subcortical vascular dementia (known as Binswanger’s disease)
- (CADASIL) Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy
What are the Risk Factors for vascular dementia?
They mirror those of stroke and CVD:
- hypertension
- diabetes mellitus
- hyperlipidemia
- smoking
- atrial fibrillation
What is the clinical presentation of vascular dementia?
It’s characterised by a progressive, stepwise deterioration in cognition.
This typically occurs over a span of several months to years.
Patients may present with a history of strokes.
What are some differentials for vascular dementia?
Alzheimer’s disease
Lewy body dementia
Frontotemporal dementia
Normal pressure hydrocephalus
What are the first line investigations for vascular dementia?
Comprehensive history and examination
Cognition screening - MMSE (Mini-Mental State Examination) or MoCA (Montreal Cognitive Assessment)
Medication review - to exclude medication-induced cognitive impairment.
MRI Scan show white matter changes
Exclusion of reversible organic causes - like vitamin B12 or folic acid deficiency, hypothyroidism, or normal pressure hydrocephalus.
What is the diagnostic investigation for vascular dementia?
MRI Head - To identify vascular changes or infarcts
What is the management of vascular dementia?
Detection and address of CV risk factors
- hypertension, diabetes, hyperlipidaemia and smoking
symptomatic treatment
- Tailored to the individual
- Include: cognitive stimulation programmes, multisensory stimulation, music and art therapy, animal-assisted therapy
- Managing challenging behaviours e.g. address pain, avoid overcrowding, clear communication
What is the definition of frontotemporal dementia?
Frontotemporal dementia is a heterogeneous group of neurodegenerative disorders characterised by progressive atrophy of the frontal and/or temporal lobes of the brain.
Leading to impairments in behaviour, personality, language, and motor functions.
What are the 3 recognised types of Frontotemporal Dementia?
- Frontotemporal Dementia (Picks Disease)
- Progressive Non Fluent Aphasia
- Semantic Dementia
What is the epidemiology of frontotemporal dementia?
It’s one of the most common forms of early onset dementia.
Typically develops in peoples’ 60s and 70s
What are some common features of Frontotemporal lobar dementias?
Onset before 65
Insidious onset
Relatively preserved memory and visuospatial skills
Personality change, disinhibition, language impairment and social conduct problems
What are the macroscopic and microscopic findings of Picks disease?
Focal gyral atrophy with a knife-blade appearance is characteristic of Pick’s disease.
Macroscopic changes seen in Pick’s disease include:
- Atrophy of the frontal and temporal lobes
Microscopic changes include:
- Pick bodies - spherical aggregations of tau protein (silver-staining)
- Gliosis
- Neurofibrillary tangles
- Senile plaques
What is the clinical presentation of frontotemporal dementia?
Personality change and impaired social conduct.
Other common features:
- Hyperorality
- Disinhibition
- Increased appetite
- Perseveration behaviours.
Language impairment is another common feature
What sort of personality changes may someone with frontotemporal dementia exhibit?
Patients often exhibit disinhibited behaviour and apathy early on.
What are some differentials for frontotemporal dementia?
Alzheimer’s disease
Vascular dementia
Creutzfeldt-Jakob disease
Rapidly progressive dementia with neurological signs like myoclonus, ataxia, and visual disturbances. Periodic sharp wave complexes on EEG are suggestive.
Primary progressive aphasia
Characterised by gradual, insidious decline in language abilities with relative preservation of other cognitive functions.
How is frontotemporal dementia diagnosed?
Neuroimaging (like CT and MRI)
Would show atrophy of frontal and/or temporal lobe
Genetic Testing
Used in cases where an inherited form of FTD is suspected
What is the management for frontotemporal dementia?
Non-Pharmacological
Cognitive Stimulation Therapy
Counselling
Behaviour modification strategies
Caregiver support
Speech and language therapy
Physiotherapy
Occupational therapy
Pharmacological
SSRIs and Antipsychotics to control behavioural symptoms
There is no curative treatment
Define Dementia with Lewy Bodies
It’s a type of rapidly progressive dementia caused by deposits of an abnormal protein (alpha-synuclein) forming cytoplasmic inclusions known as Lewy bodies within brain cells.
These aggregates disrupt normal cell functioning and eventually lead to neuronal death.
Where in the brain do Lewy Bodies accumulate?
Abnormal protein (alpha-synuclein) forming cytoplasmic inclusions known as Lewy bodies within brain cells.
Accumulate in:
- Substantia nigra
- Paralimbic
- Neocortical areas.
What other neurological condition is Dementia with Lewy Bodies associated with?
Parkinson’s Disease
What are the clinical features of Dementia with Lewy Bodies?
- Fluctuating cognition compared to other forms of dementia
- REM sleep disorder (often the initial symptom)
- Parkinsonism
- Recurrent Visual hallucinations
- High sensitivity to neuroleptics (antipsychotics)
What will neuroleptics (antipsychotics) do in someone with dementia with Lewy Bodies?
They can induce or worsen parkinsonism
They can also cause neuroleptic malignant syndrome
What are some differentials of Dementia with Lewy Bodies?
Alzheimer’s disease
Parkinson’s disease dementia
It shares many symptoms with DLB, but Parkinson’s disease dementia tends to start with motor symptoms year before cognitive decline.
Vascular dementia
What are first line investigations may be done in Lewy Body Dementia?
Careful History and clinical examination (Diagnosis is primarily clinical)
CT/MRI Head May be normal or show cortical atrophy
Dopamine transporter (DaT) scan
Can help distinguish DLB from other types of dementia.
What is the management for Dementia with Lewy Bodies?
Pharmacological
- AchE inhibitors (Donepazil, Rivastigmine) and Memantine can be used
- Neuroleptics should be avoided due to the risk of irreversible parkinsonism
Non-Pharmacological
- Cognitive stimulation therapy
- Physical therapy
- Occupational therapy
Supportive Care
- Palliative and end-of-life care considerations (due to its progressive nature)
Why are neuroleptic medications not used in Lewy Body Dementia?
Due to the high risk of developing irreversible parkinsonism
Define Parkinson’s Disease
It’s a condition where there is a progressive reduction in dopamine in the basal ganglia, leading to disorders of movement.
The symptoms are characteristically asymmetrical, with one side of the body affected more.
The typical patient is an older man, around 70 years old, with a gradual onset of symptoms.
What is the classic triad of Parkinsonism?
Resting tremor (a tremor that is worse at rest)
Rigidity (resisting passive movement)
Bradykinesia (slowness of movement)
Describe the epidemiology of Parkinson’s
Prevalence increases with age
More common in males
What is the most likely cause of Parkinson’s disease?
The accumulation of Lewy Bodies within the dopaminergic cells of the substantia nigra of the basal ganglia; leading to their neuronal death and the reduction of dopamine.
Name some risk factors for Parkinson’s
Family History
Male Sex
Increasing Age
Being a non-smoker - Smoking reduces the risk of Parkinson’s
What are the motor characteristics of Parkinson’s?
Triad of Parkinsonism
Bradykinesia
Asymmetric 3-5Hz “pill-rolling” tremor
Lead pipe rigidity
This can manifest in a Parkinsonian gait
(small, shuffling steps, slowness of movement, especially on initiation and turning, flexed posture, and asymmetric tremor)
Other features:
- Hypomimic facies
- Cogwheeling when testing tone
What are some non-motor characteristics of Parkinson’s?
Depression
Sleep disturbance and insomnia
Loss of the sense of smell (anosmia)
Postural instability (increasing the risk of falls)
Constipation
Erectile Dysfunction
Cognitive impairment and memory problems
What are some Parkinson’s-Plus Syndromes?
- Multiple System Atrophy - Presents with early autonomic dysfunction and postural instability compared to PD
- Lewy Body Dementia - Early and prominent cognitive dysfunction before parkinsonism traits. (Visual Hallucinations)
- Progressive Supranuclear Palsy
- Corticobasal Degeneration
What are some differential Diagnoses for Parkinson’s Disease?
- Benign Essential Tremor
- Multiple System Atrophy (MSA): Very prominent autonomic dysfunction, early postural instability, poor response to levodopa
- Dementia with Lewy Bodies (DLB): Early and prominent cognitive dysfunction, visual hallucinations, fluctuating cognition
- Progressive Supranuclear Palsy (PSP): Early gait instability and falls, vertical gaze palsy, prominent axial rigidity
- Corticobasilar Degeneration: May have predominant apraxia, aphasia and ‘alien hand’ syndrome
- Wilson’s Disease: May be associated with signs of liver disease
- Dementia Pugilistica: Secondary to repeated head trauma
What are the investigations for Parkinson’s Disease?
Parkinson’s disease is primarily a clinical diagnosis, supported by positive response to treatment trials.
An absolute failure to respond to 1-1.5g of levodopa daily almost excludes a diagnosis of idiopathic Parkinson’s disease.
Other investigations such as MRI Head or a Dopamine Transporter Scan (DaT scan) can be considered in atypical cases.
The NICE guidelines recommend that the diagnosis is made using the UK Parkinson’s Disease Society Brain Bank Clinical Diagnostic Criteria
What is the Management of Parkinson’s Disease?
Tx focused on Symptom control and minimising side effects:
Levodopa (combined with Decarboxylase inhibitors Carbidopa / Benserazide)
- Co-beneldopa (levodopa and benserazide), with the trade name Madopa
- Co-careldopa (levodopa and carbidopa), with the trade name Sinemet
COMT Inhibitors - Decarboxylase inhibitor to prevent breakdown of L-DOPA
MOA Inhibitors - Inhibit the breakdown of neurotransmitters such as dopamine and serotinin.
Dopamine Agonists - Mimic action of Dopamine
What is the definition of Osteoporosis?
Osteoporosis is a systemic skeletal disease characterised by reduced bone mass and altered microarchitecture of the bone tissue, leading to increased bone fragility and a consequent increase in fracture risk.
It is typically defined by a DEXA scan T-score of -2.5 or lower
What is the epidemiology of Osteoporosis?
Higher prevalence with increasing age
Most common in postmenopausal women and elderly men.
What are the 2 major risk factors for Osteoporosis?
Age
Female Gender
SHATTERED
What are the risk factors for Osteoporosis?
Steroid use
Hyperthyroidism, hyperparathyroidism
Alcohol and smoking
Thin (BMI<22)
Testosterone deficiency
Early menopause
Renal/liver failure
Erosive/inflammatory bone disease
Diabetes
What are the symptoms and signs of Osteoporosis?
It tends to be asymptomatic until a fracture occurs
- Back pain, caused by a fractured or collapsed vertebra
- Loss of height over time
- A stooped posture
- A bone fracture that occurs much more easily than expected
What is the pathophysiology of Osteoporosis?
Bone Mineral Density and Bone mass is reduced however the mineralisatoin of bone is unchanged in Osteoporosis.
Bone remodelling imbalance
- Increased bone resorption from osteoclasts
- Reduced bone formation by osteoblasts
- Reduction in both bone mineral density and matrix density reducing bone mass.
Bones Brittle and Fragile
- Reduced bone density and mass
- Causes brittle and fragile bones
Increased fracture risk
Give some differentials of Osteoporosis?
Metabolic bone diseases
e.g. osteomalacia and hyperparathyroidism - presents with low bone mass and increased fracture risk.
Malignancies
e.g. multiple myeloma or metastatic disease, which can lead to pathologic fractures similar to those seen in osteoporosis.
Secondary causes of osteoporosis
e.g. Cushing’s syndrome, hyperthyroidism, and certain medications (e.g., glucocorticoids, anticonvulsants).
What is the Gold Standard investigation for osteoporosis?
DEXA Scan (Stands for Dual-Energy X-Ray Absorptiometry)
A bone mineral density T-Score of -2.5 is diagnostic of osteoporosis.
Its measured at the hip