Though shalt not covet your neighbor’s….
There is really nothing special about Heubner artery — its simply the most medial of lenticulostriates. Really, why should the lateral group not feel cheated?
In the MCA and ACA pages, we treat broadly the notion that all lenticulostriates are created equal — and Heubner is not more equal than others. its a balance — there can be dominance of any lenticulostriates — lateral, medial, whatever. Defining the “classic” territory of Heubner is an exercise in futility. Its all about balance.
Here is a very large Heubner (arrows), with a few branches of its own (arrowheads) arising from ACOM region, and taking over all medial and some lateral lenticulostriates (dashed arrow) which are thus small in caliber. Why not
Cross eye stereo
View from back shows small caliber of lateral lenticulostriates (dashed arrows) — again balance — big Heubner means small lateral group. A very small and very lateral branch (ball arrow) is probably taking care of external capsule area
Anaglyph view from back
View from above shows its A1-A2 junction origin
Not bad huh — lots more on ACA page