Hi,welcome to HCM,
(shear-force impact ) is described as some violent or abrupt force applied to brain , According to the classic definition, no structural brain damage
occurs in concussion.
The clinical presentation might be retrograde amnesia
,the second part of your question - anesthesia
can commonly cause convulsion
,how-ever it depends on type ,technique &dose .,but no structural brain damage occurs.
Kindly,don't use any medicine or herbal product without consultation to your doctor ,Finally ,if you are asymptomatic no need to worry!