Jacob's limp

Judaism, Summer, 1995 by Schneir Levin

What was the nature of the nocturnal disorder (Genesis 32:25, v. 26 in the Hebrew) that caused Jacob to limp? (v. 31, v. 32) One could study the opinions of the religious scholars or of physicians. Something happened in the hollow of Jacob's thigh, his groin, during his disturbed dream, and the issue depends on how the Hebrew verb va-tayka (v. 26) is to be translated. Jacob's dream opponent did something (tayka) to the hollow, the groin. What happened? All translators focus on the hip which was:

Hirsch translation   dislocated
Hertz                strained
Fisch                out of joint
Tanakh JPS           wrenched

Non-Jewish translators include:

Septuagint                 numbed
Authorized Version         out of joint
New Intern. Version        wrenched
New English (and           dislocated
  Revised English Bible)