Question

becky worked at a diner for her summer job. a customer ordered the breakfast special which included pancakes, eggs, and bacon. as becky was in the kitchen flipping pancakes her forearm rotated toward the ceiling for a fancy backward final flip. what roll and slide mechanism did her forearm (at the elbow) undergo during this motion? a) anterior roll and glide b) anterior roll, posterior glide c) posterior roll and glide d) posterior roll, anterior glide

Explanation:

When the forearm rotates backward (supination - rotating the forearm so the palm faces upward or ceiling - in this case), at the elbow joint, the radius (one of the forearm bones) undergoes an anterior roll and a posterior glide. This is due to the mechanics of the radioulnar joint during supination.

Answer:

B. Anterior roll, posterior glide