Epley’s manoeuvre for BPPV of posterior canal showing
position of patient and corresponding position of otolith
debris in the pos-terior canal.
(A) Patient sitting facing forward.
(B) Patient lying down in Dix-Hallpike position
With head hanging and turned 45˚ to right
(the affected ear).
(C) Head turned to left Dix-Hallpike position with
affected ear up.
(D) Head and body both turned as a unit to
unaffected side so that face is turned to the ground.
(E) Patient is made to sit with head bent forward by 20˚
Trigeminovascular system consists of
small pseudounipolar sensory neurons
that originate from trigeminal ganglion
and upper cervical dorsal nerve roots.
These neurons innervate cerebral blood
vessels, pial vessels, dura mater,
and large venous sinuses.