Author Question: Shelly gives her son an ice-cream cone. The boy grasps the cone with his right hand, opens his ... (Read 81 times)

PhilipSeeMore · **on:** Feb 28, 2019

Shelly gives her son an ice-cream cone. The boy grasps the cone with his right hand, opens his mouth, and begins to lick the ice cream. Which muscles does he use to perform these actions?

Question 2

Jeff is interested in toning his abdomen. What muscles would you tell Jeff to exercise to accomplish his goal? What movements would best exercise these muscles?

covalentbond · **Reply #1 on:** Feb 28, 2019

Answer to Question 1

As the child grasps the ice-cream cone, he uses flexor muscles, principally the flexor digitorum superficialis, flexor digitorum profundus, and flexor pollicis longus muscles. Opening his mouth requires the contraction of the platysma and digastric muscles and the relaxation of the masseter, temporalis, and pterygoid muscles. The licking action would involve the genioglossus muscle (to depress and protract the tongue and the palatoglossus muscle (to elevate the tongue).

Answer to Question 2

Jeff should do exercises that flex and twist the trunk. The muscles he should target are the rectus abdominis muscles, and the external and internal oblique muscles. Sit-ups and twisting movements will stimulate these muscles. If he places a weight on his chest as he does sit-ups, it will produce faster results because the rectus abdominis muscle would be working against a greater load.