
a.
To determine: The type of joint motion when a person sits in a good posture with the thumb beneath the chin and opens the mouth against slight pressure.
Introduction: The temporomandibular joint (TMJ) is the joint that is frequently involved in swallowing, chewing, talking, and yawning. It is a synovial joint that is present anterior to the ear and posterior superior to the jaw.
b.
To determine: The type of muscle contraction that occurs when a person sits in a good posture with the thumb beneath the chin and opens the mouth against slight pressure.
c.
To name: The primary muscles responsible for moving the mouth when a person sits in a good posture with the thumb beneath the chin and opens the mouth against slight pressure.
d.
To name: The muscle group that assists in moving the mouth when a person sits in a good posture with the thumb beneath the chin and opens the mouth against slight pressure.
e.
To determine: The group in which the TMJ muscles act to stabilize the given activity.
To determine: The structure stabilized by the mentioned activity and the motion that the structures prevent.

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Chapter 14 Solutions
Laboratory Manual for Clinical Kinesiology and Anatomy
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