Neurology-Movement-Disorders-and-others Flashcards
Types of tremors: 5
- Resting
- Postural
- Action
- Postural-action
- Intention
Rhythmic and oscillatory movement of a body part with a relatively constant frequency and variable amplitude. It is caused by either alternating or synchronous contractions of antagonistic muscles
Tremors may be broadly classified into resting, postural, action, postural-action, and intention tremors
Tremor present when holding up a newspaper versus when pouring a cup of tea
Postural versus Action
Postural tremors occur with the body part suspended against gravity. Action tremors remain unchanged during the course of a voluntary movement.
also known as cerebellar tremor, is a dyskinetic disorder characterized by a broad, coarse, and low frequency (below 5 Hz) tremor. The amplitude increases as an extremity approaches the endpoint of deliberate and visually guided movement
Intention tremor
(kinetic tremor subtype)
involuntary, rhythmic oscillations of one or more body parts
Tremor
Differentiate ET from Parkinsons’: parameters
- Laterality: Parkinson’s is unilateral
- Action vs rest
- Alcohol response: improves ET, no effect in Parkinson’s
- Speed: Fast (6-10) hz, Slow (4-6) hz
- Movement: flexion-extension, pill rolling
Which tremor has a genetic component?
ET
- Involuntary excessive muscle contractions that tend to be sustained and patterned,
- initiated or worsened by voluntary action and associated with overflow muscle activation
- abnormal postures or movement
- dysfunction of the basal ganglia, cerebellum, cortex
Dystonia
Drug groups causing dystonias
- Anti-emetics
- Anti-psychotics
Stroke in this part can cause dystonia
Putamen
Dystonia classification basis
Body part affected
Eg: spasmodic dysphonia: vocal cords,
Treatable causes of dystonia
- Wilson’s
- Dopa-responsive dystonia
- DYT1 gene–associated dystonia
Rx: focal dystonias
Botulinum
This is a transverse section of the striatum from a structural MR image. The striatum includes the caudate nucleus (top) and putamen (right) and the globus pallidus (left).
The putamen and caudate nucleus together form the dorsal striatum.
Involuntary, irregular, unpatterned, and unsustained movements with variable timing and distribution
Chorea
Involuntary slow and irregular writhing movements most often affecting the distal limbs
Athetosis
Involuntary, large-amplitude, flinging movements, typically involving proximal muscles that move an entire limb
Ballism
Autosomal dominant inheritance with gene test for triplet nucleotide repeat. Chorea, psychiatric symptoms, and cognitive dysfunction progress over 10 to 20 years until death.
Huntington
Strokes in this basal ganglia nucleus will cause choreoathetoid movements
sub-thalamic
disorder of childhood resulting from infection via Group A beta-hemolytic streptococcus (GABHS), characterized by rapid, irregular, and aimless involuntary movements of the arms and legs, trunk, and facial muscles
Sydenham’s chorea
Prognosis of chorea from stroke
Ofent improves on its own
Drug-induced movement disorders can include
- Tremor
- Parkinsonism
- Choreoathetosis
- Acute dystonia
- Tardive dystonia
Tetrabenazine
symptomatic treatment of hyperkinetic movement disorders
Involuntary, abrupt, brief and jerky movement of a body part. Often described as “lightning fast.”
Myoclonus
What sort of involuntary movement is a hiccup?
Myoclonus
Jerky movements when falling asleep
Hypnic jerks
Lance-Adams syndrome
Post-hypoxic myoclonus
Asterixis is a type of:
Myoclonus