Interstate 635 (Texas) Interstate 635 (Texas) Interstate 635 (I-635) is a partial loop around Dallas, Texas, in the United States between I-20 in Balch Springs and State Highway 121 (SH 121) at the north entrance of the Dallas-Fort Worth International Airport in Grapevine. It intersects I-35E at exits 27B–C, but does not connect with I-35W. It is known locally as the Lyndon B. Johnson Freeway, or LBJ, named after Lyndon B. Johnson, the former U.S. Senator from Texas, 37th Vice President, and the 36th President of the United States. Where I-635 ends at I-20, I-20 continues the LBJ Freeway name heading west. Because
Referred itch Consequently, scratching an itch in a location that has previously served as the point of a referred itch does not induce an itch in the person’s typical origination site. Mitempfindung has been thought to be related to synesthesia in some individuals, specifically digit-color synesthesia. Digit-color synesthesia is a phenomenon in which affected individuals associate individual numbers with certain colors; individuals have been said to "count in colors." Both synesthesia and mitempfindung develop in early childhood and are highly variable among individuals. Furthermore, synesthesia and mitempfindung are both unidirectional. A scratch on the trigger zone creates a referred sensation in a