[Mikey_1962]

Caput does not mean head in Latin. It doesn’t mean anything. Perhaps the author means capitus?

[Mad Dawg]

caput, capitis, neuter, 3rd declension, head, stem capit-

Thus capit-al, of or pertaining to the head.

Source: 7th grade Latin class, Eastwoods School, Oyster Bay, Long Island, New York, 1959