Inability to abduct left eye with LMN fascial palsy on same side. The lesion is in
A. Left pons
B. Right ponsC. CP angle tumor
D. Cerebellar lesions
Ans.
A. Left pons
°
Theabducentnucleus is present in the pons along with facial
nucleus and both are damaged here.
o
These nuclei contain the lower motor neurons and hence the lesion here
gives ipsilateral signs
o Hence, the lesion in the left pons leads to left facial palsyand
inability to abduct the left eye laterally -
o The pons is a structure located on the brain stem.
o It is above the medulla, below the midbrain, and anterior to the
cerebellum.
o The posterior back. surface of
the pons forms part of the floor of the fourth ventricle of the brain.
