25 – Cerebellum II

Question 1

‘cerebellar ataxia’ with cerebellar lesion:

Answer 1

1. Dysmetria (specifically HYPERmetria
   >Too fast
   >Too forceful
   >Too far
2. Truncal ‘sway’

Question 2

Proprioceptive deficits with cerebellar lesion:

Answer 2

-NEVER totally gone
-abnormal: exaggerated

Question 3

NOT paralyzed with a cerebellar lesion:

Answer 3

-all UMN are intake
>NO paralysis
>NO paresis

Question 4

Additional lesions of the cerebellum:

Answer 4

1. Truncal ataxia: broad stance
2. Signs of vestibular disease
   movements (nystagmus)
3. Opisthotonus

Question 5

Truncal ataxia: broad stance

Answer 5

-Truncal sway

Question 6

Signs of vestibular disease

Answer 6

-Head tilt
-Falling to one side
-Rolling (‘vertigo’)
-Abnormal eye

Question 7

Opisthotonus

Answer 7

-Abnormal hyperextension of body/head/limbs

Question 8

Most often with vestibular signs it is due to:

Answer 8

-peripheral vestibular disease
Ex. ear infection

Question 9

Diffuse disease of cerebellum:

Answer 9

-bilateral signs

Question 10

Focal disease of cerebellum:

Answer 10

-ipsilateral signs (sometimes bilateral)

Question 11

If you are seeing contralateral signs…

Answer 11

-think something in FOREBRAIN
>circling to the left, but have proprioceptive deficits on right side

Question 12

What are the causes of cerebellar lesions? (not needing to know them all)

Answer 12

-neoplasia
-infections (due to high vascular supply)
-metabolic disorders/toxins
-abscess
-increased intercranial pressure
-congenital malformations/hypoplasia/atrophy
-caudal/ventral skull fractures
-herniation
-trauma
-ischemia/stroke
-high-altitude cerebral edema