Neuro assessment and neurosurgery Flashcards
What is core in the neurological examination and why?
General appearance Vital signs Gait Fundoscopy (papilloedema/optic atrophy) UMN signs Vibration sense Patient cannot tell you they've lost these
What do you do for a patient that cannot give you a history?
ABC rescuscitation
Collateral history - who it is gives more weight
Generalised appearance
Vital signs - temp, pulse rate, resp rate, BP ,sats
Mini-neurological examination
What is in a mini-neurological examination?
Pupils
GCS
Lateralising signs
Why might you get fixed dilated pupils?
CN III palsy
Travels over petrous part of temporal bone containing inner and middle ear structures (parasympathetic fibres)
Being pushed down onto bone
Bad sign
Check not blind in one eye - should still get indirect light response if normal and blind in eye
What should you ask about in a neurological history to help improve QOL?
Mobility Eating/drinking/nutrition Communication Personal hygiene/continence Interpersonal relationships - psychological disorder underlying School/job/hobbies Sleep
What 2 syndromes do signs appear before symptoms and why is this important to know?
Diabetic peripheral neuropathy
Cord compression in neck
Screen for these issues
What is the pain tool?
Site Radiation Onset Precipitating factor Duration Course Progression Character Severity Disturbing sleep Alleviating/exacerbating factors Associated symptoms Ever had before Response to conservative measures Significantly interfering with lifestyle - Mobility - Communication - Interpersonal relationships - School, work and/or hobbies - Continence, sexual function, and personal hygiene - Sleep - Eating/drinking/nutrition
What is a clinical syndrome?
Cluster of symptoms and signs
Most have underlying structural abnormalities
What are the S&S of myopathies?
Hair, stairs, chair - difficulty getting out of chair, difficulty walking up stairs, difficulty washing hair
Ask them to squat using one leg
Muscular dystrophies
What are the S&S of myasthenic syndromes?
Fatigueable, repeatable activity Blink can fatigue Walking can be difficult Listening to story to know at what point sign might be positive eg walking distance MG - most common Lambert Eaton syndrome (paraneoplastic)
What are the main mononeuropathies?
Carpel tunnel syndrome and ulnar nerve entrapment at elbow
Radial nerve injury - fracture of humerus
Axillary nerve injury - shoulder dislocation/injury
What are the S&S of mononeuropathies?
Pain/paraesthesia/numbness In nerve distributions Generally affect upper limb those affecting lower limb are rare Have no signs Investigated with EMG/NCS
What are the S&S of peripheral neuropathies?
Paraesthesia
Numbness/loss of sensation
Diabetes - risk factor
What are the S&S of vertebral pain syndrome?
Localised aching pain, limited radiation, stiffness/restriction of movement
Worse with activity and absence of associated neurological symptoms
Visible/palpable paravertebral muscle spasm, paravertebral tenderness and restriction on movement on examination
Commonly wear and tear/degenerative changes rarely - TB, bacterial discitis, osteomyelitis, osteoporotic fractures, metastatic disease (particularly if thoracic)
What are the S&S of radiculopathy?
Often radiating limb pain, in pattern of dermatome, sharp/shooting in character, only a small portion have associated neurological symptoms - dermatomal sensory loss, less commonly myotomal muscle weakness
What will you lose in a C6 radicuolpathy?
Thumb dermatome
Biceps myotome
Biceps jerk
What will you lose in a C7 radiculopathy?
Middle finger dermatome
Biceps myotome
Triceps jerk
What will you lose in an L5 radiculopathy?
Dorsum of foot/big toe dermatome, dorsiflexion (standing on heels)
What will you lose in a S1 radicuopathy?
Ankle, lateral aspect of foot/sole of foot/little toe dermatome
Plantar flexion (standing on toes)
Ankle jerk
What is spinal claudication?
Radiculopathic syndrome
What are the S&S of spinal claudication?
Bilateral radiating leg pain/paraesthesia that comes on with walking and have to stop and rest for a number of minutes before walking on again (walking distance limited)
Symptoms relived by leaning forwards
What are the red flag symptoms in radiculopathy?
Constant bilateral radiating leg pain
Perineal numbness
Foot weakness
Urinary symptoms of immediate concern
What are the S&S of myotomal disorders?
Neuroclinical syndrome involving spinal cord
Commonest cause - disc-osteophyte cord compression
If left too long, not likely to make significant recovery
Signs before symptoms - test for long tract signs
What are the S&S of RIP?
Gradual onset, progressive headache, val salva component - worse on coughing and straining
Associated with N&V, double vision, general deterioration with respect to cognitive functioning and mobility
Present with deteriorating level of consciousness
Look for drowsiness, papilloedema, paralytic squint (3rd/4th/6th nerve palsy)
Fixed dilated pupil
Reduced level of consciousness
What are the S&S of meningeal irritation?
Severe headache, vomiting, photophobia, neck stiffness
Sudden onset if SAH
Drowsy, pyrexia if meningitis, photophobic, neck stiffness
CT then LP
How can you differentiate between acute confusional state and dementia?
Duration of confusion
Acute - secondary brain problem
Dementia - primary brain problem
How does cerebellar syndrome present?
Feels drunk
S&S are ipsilateral to side of lesion
Signs - gait ataxia, ataxia on finger to nose testing, nystagmus
How do frontal lesions present?
Contralateral limb weakness
Motor dysphasia for dominant frontal lobe
Personality in anterior frontal love duplicated so only affected if both sides affected
How do parietal lesions present?
Non-dominant - contralateral sensory disturbance (no limb pain)
Dominant - as per non-dominant with higher sensory processing associated issues such as dylexia, dysgraphia, dyscalculia and astereognosis