The vastus lateralis and vastus medialis are muscles of the quadriceps group, primarily responsible for knee extension. While they do not directly connect to the biceps, they are part of the larger kinetic chain involved in movements such as squatting or jumping, where both the quadriceps and biceps (particularly the biceps brachii) may be engaged in stabilizing and moving the body. Thus, while they function in different muscle groups, they can work together during coordinated movements.
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