Clinical questions; motor control systems/lesions Flashcards Preview

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Flashcards in Clinical questions; motor control systems/lesions Deck (16)
1

What are the three motor control systems?

Corticospinal system
Extrapyramidal system
Cerebellum

2

On examination a patient has; a drifting of one limb downwards and medially when the hands are supposed to be outstretched. The forearm is also pronated. In which motor control system does this patient have a problem?

Corticospinal

3

Weakness, spasticity and changes in superficial reflexes are due to problems in which motor control system?

Corticospinal

4

Would problems in the upper motor neurones causes weakness in muscle groups or individual muscles?

Muscle groups

5

If there is an upper motor neurone problem; will there more obviously be weakness in the extensors or flexors of the arm?

Extensors

6

If there is an upper motor neurone problem; will there more obviously be weakness in the extensors or flexors of the leg?

Flexors

7

Is spasticity a problem with upper or lower motor neurones?

Upper

8

List some characteristics of muscles affected by lower motor neurone disease

Wasting
Fasiculations

9

Are reflexes increased or decreased in lower motor neurone lesions?

Decreased

10

A patients walks with a broad based gait. Where is there most likely to be a problem?

cerebellum

11

A patient has truncal ataxia - she has difficult standing as well as sitting in a chair. Where is the problem?

The vermis of the cerebellum

12

Cerebellar disease affecting the right cerebellar hemisphere would cause the patient to veer towards which side of the body?

Right

13

In what disease is there degeneration of the caudate nucleus?

Huntingtons disease

14

A patient presents with pain in the right ear and her mouth is sagging on the right hand side.

Bells Palsy.

15

What is Bells Palsy?

Lower motor neurone lesion affecting the facial nerve. All the muscles on one half of the face are affected and there may be loss of taste sensation of the anterior 2/3rds of the tongue.

16

62 year old lady presents with a stiff spastic tongue and donald duck like speech. On examination she has a brisk jaw jerk and was prone to laughing inappropriately.

Pseudobulbar palsy. Upper motor neurone lesions of the lower cranial nuclei. MND can be associated with emotional lability.