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Physiology of Balance and Vestibular Functions Prof. Vajira Weerasinghe  Dept of Physiology
 
Major functions ,[object Object],[object Object],[object Object],[object Object]
Vestibular apparatus ,[object Object],[object Object],[object Object]
Vestibular apparatus ,[object Object],[object Object]
Semicircular canals ,[object Object],[object Object],[object Object]
 
 
During movement ,[object Object],[object Object],[object Object]
 
During movement  movement of the cupula and its embedded hairs during rotation first in one direction and then in the opposite direction
Transduction in semicircular canals ,[object Object],[object Object],[object Object],[object Object],[object Object]
 
Transduction in semicircular canals ,[object Object],[object Object],[object Object],[object Object]
Semicircular canals ,[object Object],[object Object],[object Object]
Semicircular canals ,[object Object],[object Object],[object Object]
Otolith organs (utricle and saccule) ,[object Object],[object Object],[object Object]
 
[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object]
 
[object Object],[object Object],[object Object],[object Object]
[object Object]
[object Object],[object Object],[object Object]
Central connections ,[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object]
 
Role of vestibular system
Role in posture ,[object Object],[object Object],[object Object]
Postural reflexes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Video
Vestibulo-ocular reflex ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Video
 
Eye movements ,[object Object],[object Object]
What is nystagmus? ,[object Object]
Various types of nystagmus ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Optokinetic nystagmus
 
Physiological basis of nystagmus ,[object Object],[object Object],[object Object],[object Object]
Oculocephalic reflex (Doll’s head phenomenon, Doll’s manoevre) Doll’s  head phenomenon ,[object Object],[object Object],[object Object],[object Object],[object Object]
Caloric testing ,[object Object],[object Object],[object Object],[object Object],Video
Vertigo ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Balance