>>3656314Loss of consciousness and subsequent death from insufficient circulation of oxygenated blood in the brain (strangulation), Is separate from that of inability to breath (asphyxiation).
The former is effected by the compression of the rope on the carotid artery, the latter by the compression of the wind-pipe. A hanging man will lose consciousness quite quickly from the relatively painless loss of blood-flow, with the blocked wind-pipe, whilst supposedly being very painful, not being the direct cause of either unconsciousness or death.