Pons: Basis pontis and fascicles of CN VI amd VII
- Basilar artery: Short circumferential branches
- Basilar artery: Paramedian branches
Signs & Symptoms
|Contralateral||Weakness – upper and lower extremity||Pyramidal tract|
|Ipsilateral||Lateral gaze weakness||CN VI|
|Ipsilateral||Weakness – face – entire side||CN VII|
A unilateral lesion of the ventrocaudal pons may invovle the basis pontis and the fascicles of cranial nerves VI and VII. Symptoms include:
- Contralateral hemiplegia (sparing the face) due to pyramidal tract involvement
- Ipsilateral lateral rectus palsy with diplopia that is accentuated when the patient looks toward the lesion, due to cranial nerve VI involvement.
- Ipsilateral peripheral facial paresis, due to cranial nerve VII involvement.