bombardier
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As we are back on the topic of the strange behavior exhibited, I'm just boosting some posts I made earlier about a possible medical event that could lead to such behaviors.
I should probably elaborate on my tentative theory of a complex partial seizure! These types of seizures do not occur throughout the whole brain, but rather in one specific lobe, so it creates very odd symptoms that people do not immediately clock as a seizure.
Symptoms are usually preceded by an 'aura' (a weird feeling or strange sensation; which also gives me pause wondering if Jason could have started seizure activity before the crash and the aura led to the actual crash), and the symptoms themselves usually last under 3 minutes, though they lead to post-ictal symptoms (symptoms after the seizure occurs, like confusion, tiredness, and strong emotions).
Symptoms are specific to the person and specific to the lobe affected, but all show a lack of awareness to ones environment, it looks like someone has gone on 'autopilot'. People can freeze up, moan, cry, repetitively pick at things, start walking aimlessly, and start removing clothing. Here is a good resource about this kind of seizure.
While a complex partial (also called a focal awareness impaired) seizure is usually associated with a known diagnosis of epilepsy (vs a one-off seizure in response to stimuli), of course, there are exceptions!
Here is the abstract to a study of patients who developed complex partial seizures following head injury, 16/25 of which had their head trauma later in life.
Here is a case study of a man who developed complex partial seizures following a severe head injury after a road traffic accident.
Here is the abstract to a study of patients who developed odd, complex partial seizures after a relatively minor closed head injury (i.e. a concussion or bruising without loss of consciousness). This one is very interesting to me and I might go try to find the whole article, as the details match up well to Jason's case.
(sorry about all the links and rambling- I've been out of uni since April and I'm itching to research again had to hold myself back from using APA citations there)