Mr. Bell presents with the inability to move certain muscles on one side of his face. You ask him to make various facial expressions and find that on his right side he is unable to purse his lips, pull in his cheeks, elevate his upper lip, and smirk. What muscles is Mr. Bell unable to contract?

Predict the location and function of the flexor digitorum profundus muscle based only on its name.

Explain how the diaphragm muscle is able to increase the size of the thoracic cavity even though it doesn't insert into a bone.

Why do you think that the muscles of the erector spinae and transversospinal muscle groups remain in a state of continual contraction when we are upright?

Why do the three parts of the trapezius muscle have three different actions?

Explain why strengthening the levator ani muscle may help improve bladder and bowel continence (voluntary control over urination and defecation).