For instance, Psalm 137 reads:
If I forget you, Jerusalem,
may my right hand forget its skill.
May my tongue cling to the roof of my mouth
if I do not remember you,
if I do not consider Jerusalem
my highest joy.
A group of researchers from the School of Medicine, Sao Paulo State University thinks that the passage actually refers to the symptoms of stroke.
If I forget of you, oh Jerusalem, my right hand (my right side) shall dry, be paralyzed, loose its ability, its dexterity…
That my tongue shall stick (shall be weakened, arrested) to my palate (in my throat),
if I remember you, if I do not permit Jerusalem to be my greatest joy (if I do not sing of Jerusalem as my greatest joy)
Both right-sided paralysis and loss of expressive speech are clear symptoms of a stroke of the left middle cerebral artery, where the blood flow is blocked – leading to the death of the surrounding brain tissue, suggesting that the Psalm may be wishing these effects on people who forget the importance of Jerusalem--mindhacks.com
So did the Hebrews know about stroke 600 years before Christ? Or is it just a matter of wrong interpretation?