Chapter 14, Problem 3CEQ

a.

Summary Introduction

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.

Summary Introduction

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.

Summary Introduction

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.

Summary Introduction

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.

Summary Introduction

To determine: The group in which the TMJ muscles act to stabilize the given activity.

Summary Introduction

To determine: The structure stabilized by the mentioned activity and the motion that the structures prevent.