The transversal cervical artery and the dorsal scapular artery in the trapezius muscle and the rhomboideus muscle were observed and measured on30 cadavers(adult males).
So the neck musculature that the neck training is gonna work on for the F1 driver, which are gonna stop the head from being pulled forwards or sideways, sternocleidomastoid, the trapezius muscle.
The vagus nerve receives visceral sensory information from the thorax and abdomen, and the accessory nerve is responsible for innervating the sternocleidomastoid and trapezius muscles, neither of which is exclusively in the head.