yes, frustration, damage to that emotional area of the brain etc.....my sister's mil parted from her hubbie at 88 when he turned on her in middle of the night, hands around her throat. He had a minor one and took a bad fall, striking his head against a roadside kerb, having been pulling at a bramble in their garden....
yes, its called disinhibition. the things that we don't do or say because we self censor are no longer censored or partially no longer censored and the words/behaviour come out. Sometimes, if the stroke is very recent (two weeks or so) then the effect can wear off, either because the part of the brain that was affected recovers (transient ischaemic effect or TIA) or the person has enough awareness to learn to self censor again.
Its worse when the disinhibition affects libido.
On a more positive note, I did have one patient who has spent her whole life as a recluse and was very shy and the disinhibition changed her to a much more open and friendly person. As a result she had a much happier life.