I also wanted to add that I noticed the lateral right horn of the Hyoid Bone is located high up close proximity to the right carotid bifurcation (branching of the carotid artery into external & internal). This high up location is linked to carotid compression of the hyoid bone according to this paper (Carotid Artery Entrapment by the Hyoid Bone-A Rare Cause of Recurrent Strokes in a Young Patient - PubMed)
“The hyoid bone lies in close proximity to the carotid artery bifurcation, and anatomic variants have been implicated in carotid compression, stenosis, dissection, and pseudoaneurysm”
See the black circle below, for the right, it lies close bifurcation, for left it is below the bifurcation.
For example, my hyoid bone horns are below both bifurcation as shown below.
The other thing that makes me suspicious of this hyoid bone involvement is the tongue atrophy and fasciculation you mentioned that you have had after the last episode. The tongue is controlled by the hypoglossal nerve which passes close to the carotid bifurcation and since the hyoid bone is close to that , it is conceivable that not only head-turning compresses the carotid artery, it could also compress the hypoglossal nerve thereby causing tongue issues.
- After one big episode i had Tongue fasciculations and tongue athropy for a long time after.
I got this pic from the internet to show you how close it is to your tongue nerve
I think there is good grounds that this might need to be investigated more to rule out close contacts between hyoid bone and right carotid artery given your images and symptoms. I will also recommend that you ask you doctors blood thinners (anticoagulation medicine) as that might help alleviate stroke incidences according to the few papers about this condition. Also if you can use soft neck collar to make sure that your neck movement is limited since it is triggering these episodes will be helpful while wait for your diagnoses which might take a time given the complexity of this rare condition.