ulus ▁causes ▁the ▁quadr ice ps ▁fem oris ▁mus cle ▁to ▁contract . ▁ ▁It ▁is ▁named ▁for ▁Carl ▁Friedrich ▁Otto ▁West phal ▁( 1 8 3 3 - 1 8 9 0 ). ▁ ▁Associ ated ▁conditions ▁West phal ' s ▁sign ▁has ▁a ▁clin ical ▁significance ▁used ▁in ▁determ ining ▁ne uro dis orders ▁or ▁dise ases ▁such ▁as : ▁▁ ▁re ceptor ▁damage , ▁peri pher al ▁n erve ▁disease , ▁involving ▁the ▁d ors al ( sens ory ) ▁columns ▁of ▁the ▁sp inal ▁cord ▁ ▁and ▁c ere bell ar ▁les ions ▁ ▁les ions ▁present ▁within ▁the ▁motor ▁cor tex ▁of ▁the ▁brain ▁or ▁the ▁py ram idal ▁tract s ▁which ▁it ▁combined ▁with ▁mus cular ▁sp as ms ▁ ▁complete ▁inter ruption ▁of ▁sens ory ▁and / or ▁motor ▁imp ulse ▁transmission ▁in ▁the ▁fem oral ▁n erve ▁ ▁References ▁▁ ▁The ▁Princi ples ▁of ▁Phys i ology ▁J ensen , ▁David ▁Ph . D ., ▁App leton - Cent ury - C ro ft s , ▁New ▁York . 1 9 7 6 ▁ ▁Category : Sym pt oms ▁and ▁signs : ▁N erv ous ▁system <0x0A> </s> ▁The ▁Battle ▁of ▁Kh ay bar ▁() ▁was ▁fought ▁in ▁the ▁year ▁ 6 2 8 ▁between ▁Muslim s ▁and ▁the ▁Jews ▁living ▁in ▁the ▁o asis ▁of ▁Kh ay bar , ▁located ▁ ▁from ▁Med ina ▁in ▁the ▁north - western ▁part ▁of ▁the ▁Arab ian ▁pen ins ula , ▁in ▁modern - day ▁Sa udi