Following is true about oculocardiac
reflex except ?
a) It is also called aschner phenomenon
b) It is mediated by occulomotor and vagus nerve
c) It is characterized by bradycardia following traction on extra-
ocular muscles
d) Reflex is more sensitive in neonates
Correct Answer - B
Ans. is ‘b’ i.e., It is mediated by occulomotor and vagus nerve
Oculocardiac reflex
Oculocardiac reflex, is also known as Aschner phenomenon,
Aschner reflex, or Aschner-Dagnini reflex, o It is characterized by
decrease in pulse rate (bradycardia) associated with traction applied
to extraocular muscles and/or compression of the eyeball.
The reflex is mediated by nerve connections between the ophthalmic
branch of the trigeminal cranial nerve via the ciliary ganglion, and
the vagus nerve of the parasympathetic nervous system.
This reflex is especially sensitive in neonates and children,
particularly during strabismus correction surgery. However, this
reflex may also occur with adults.
Bradycardia, junctional rhythm and asystole, all of which may be life-
threatening,can be induced through this reflex.