Extrapyramidal system

Question 1

What is the extra-pyramidal system?

Answer 1

-A part of the motor system network causing involuntary actions.

Question 2

Name the tracts in system?

Answer 2

• Motor pathways
• Reticulospinal = influence limb movement.
• Rubrospinal = Head, neck + eye movement.
• Tectospinal = reflex activity.

Question 3

Name the 3 lobes in each hemisphere?

Answer 3

• Anterior
• Posterior
• Flocculonodular

Question 4

Name the 3 tracts in the cerebellum?

Answer 4

• Superior cerebellar peduncles = connects cerebellum with nuclei.
• Middle CP = connects pons with nuclei.
• Inferior CP = connects cerebellum with medulla.

Question 5

Functions of the cerebellum?

Answer 5

• Adjusting postural muscles.
• Maintains balance + equilibrium.
• Adjusts muscle tone.
• Refinement of complex, skilled movements.
• Enables smooth, complex movements.

Question 6

What does the cerebellum monitor?

Answer 6

• Proprioceptive sensations.
• Visual info from the eyes.
• Vestibular sensations from inner ear as movements are under way.

Question 7

Describe some disorders?

Answer 7

• Lesions affect same side of body.

- Dysarthria = slurring and slowing of speech.