Retropulsion

Retropulsion most often occurs when you are trying to reach for something higher than sholder level.

Source: wiktionary

For patients prone to retropulsion, wearing shoes with high heels may diminish or prevent the backward stepping.

Source: wiktionary

Pretreating rats with α-methyl-ρ-tyrosine (30 mg/kg i.p. at -4 h) to interrupt the synthesis of catecholamines antagonized pivoting and retropulsion induced by levallorphan (50 mg/kg i.p.) (WRAY 1973) but, surprisingly, not lateral head movements and pivoting elicited by cyclazocine (3 mg/kg s.c.) (BUCKETT and SHAW 1975).

Source: wiktionary

Retropulsion of the eye slackens the rectus muscle and, if forced ductions improve with retropulsion, then the restriction is secondary to a tight rectus muscle.

Source: wiktionary