The copperhead (Agkistrodon contortrix) is a member of the pit viper family, like most of the venomous snakes in North America. The copperhead (Agkistrodon contortrix) is a member of the pit viper family, like most of the venomous snakes in North America.
The Command Thrust models use the same bigger gearcase housing as the Mercury 150 FourStroke, but with an all-new 2.38:1 ratio ideally suited for pontoons and heavier boats. Itâs the first true oversized gearcase in the industry for outboards in this horsepower range.
What is tongue thrust? Tongue thrust refers to an âexcessive anterior tongue movement during swallowingâ or speech and the anterior placement of the tongue during rest (Bauman-Waengler, 2008). It is an orofacial muscular imbalance where the tongue contacts more than half the surface of either the upper or lower incisors or protrudes between them during swallowing, speech, and while the tongue is at rest.