I didn’t have that, but I think IJV compression can have some cognitive effects…I couldn’t find any mentions in older discussions about muddling words, but there have been a couple of research papers which talk about cognition which you might find helpful to read:
IJV compression symptoms - research paper - General / Research Papers - Living with Eagle
Cerebral Venous-Associated Brain Damage May Lead to Anxiety and Depression - General / Research Papers - Living with Eagle
And maybe this discussion will be helpful:
Coping mechanisms for jugular compression - General - Living with Eagle
I certainly had brain fog with VES, that gets mentioned alot, this improved with the surgery 
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