Cerebellar Disorders

Question 1

What is the cerebellum?

Answer 1

CNS structure developed from rhombencephalon (hindbrain)

Located on the posterior cranial fossa

Behind the pons, below the tentorium cerebelli

Has 3 main structures

Anterior lobe for maintaining gait

Posterior lobe for maintaining postural tone and planning motor activity, fine movements

Flocculonodular lobe for maintaining balance

Has 4 nuclei ( dentate, globose, fastigial, emboliform)

1 efferent pathway

Question 2

What are the cerebellar peduncles?

Answer 2

Connects the cerebellum to the brainstem

Superior- AE (anterior spinocerebellar)

Middle- A

Inferior- AE (posterior spinocerebellar)

Question 3

What are the symptoms of cerebellar disease?

Answer 3

MIDLINE STRUCTURES
Vermis - coordination + fine mov
Flocculonodular lobe - balance and eye motion

Ataxia
Dysmetria
Nystagmus
Vertigo

HEMISPHERES
Planning

Ipsilateral 
Ataxia
Dysdiadochokinesia 
Dysmetria
Dysarthria
Intention tremor

A2 R2 D3 Ti N

Question 4

What are the causes of acute cerebellar disorders?

Answer 4

Vascular

Drugs and toxins

Infections

Question 5

What are the causes of subacute cerebellar disorders?

Answer 5

Alcohol abuse

Thiamine deficiency

Demyelination

Tumors

Endocrine

Question 6

What are the causes of chronic cerebellar disorders?

Answer 6

Congenital

Chiari, Dandy walker

Degenerative

Multiple system atrophy