Cerebellum is the organ that controls tone of muscle and maintains balance of body. It is also responsible for co-ordination of the movements. There are some signs which suggest the abnormalities in Cerebellar functioning.

1. Topic discussion by : ENT – II department

2. Anatomy (and correlation of functions)
• There are three area of
cerebellum….
LOBE FUNCTION
Anterior lobe Tone
Posterior lobe Coordination
of movement
Flocculo-nodular lobe Balance

3. Anatomy (and correlation of functions)
Area of cerebellum function
Vermis Represent trunk
(axial) musculature
Para-vermal area Represent limb
musculature
Rest of cerebellar
hemisphere
• By other method, we can devide
it into….

4. Cerebellar signs
Involvement of anterior lobe (paleocerebellum)
 Flail joints : lake of stability of joints
 Pendular knee jerk : tapping of patellar tendon produces oscillating
movements of leg.
 Ataxia : inability in maintaining balance while walking

5. Cerebellar signs
Involvement of Posterior lobe (neocerebellum)
• Dysmetria : inability to measure the distance for reaching the intended
target.
• Tests - Finger nose test
- Finger finger test
• Intention tremor : due to dysmetria
• Dysdiadochokinesia : inability to do alternate opposite movement rapidly.
• Eg. Supination and pronation

6. Cerebellar signs
• Dysarthria/ scanning of speech : speech is prolonged and with
pauses in wrong places.
• Rebound phenomenon : pt is unable to check the action of agonist
muscle by corresponding antagonist muscle.

7. Cerebellar signs
Involvement of flocculo-nodular lobe (Archiocerebellum)
• Trunkal Ataxia and staggering gait
• Pt. is unsteady while standing and staggering while walking.
• Walk with two legs well apart.
• Sways from side to side
o Test : Romberg test
• Nystagmus
• Involuntary to and fro oscillatory movement of eyeball while looking on
either side.

8. Thank You