Cerebellar signs

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. Cerebellar Signs 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 Test : Romberg test Nystagmus Involuntary to and fro oscillatory movement of eyeball while looking on either side.

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