The 1st century word for hand includes the wrist.
The fact that the data that we see on the Shroud does not conform to 14th century popular idea is actually more of an indication that the Shroud is authentic.
The British Museum’s dating of the Shroud to the 14th century has been debunked. The latest dating studies give a date of 35 B.C.E. +/- 250 years.**
**THE SHROUD OF TURIN; FIRST CENTURY AFTER CHRIST!, Fanti/Malfi, 2015
(A new edition is due out soon.)