BASIC BIOMECHANICS
8th Edition
ISBN: 9781259913877
Author: Hall
Publisher: RENT MCG
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Chapter 9, Problem 4IP
INTRODUCTORY PROBLEMS
Construct a chart listing the muscles of the lumbar region of the trunk according to whether they are anterior, posterior, medial, or lateral to the joint center. Note that some muscles may fall into more than one category. Identify the action or actions performed by the muscles in each category.
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I. INSTRUCTION: Compute for the following given problem.
1. Emily can lift 21 kg (210 newtons force) using muscles that have a cross-sectional
area of 6 cm2. Use this formula to work out how many newtons per square
centimetre her muscles can pull with:
Formula: Force/Area
Antagonistic pair
I want to analyse the role of the player who is about to take the shot.Considering his elbow joint:
1) What are the agonist, antagonist and synergist muscles and what type of movement are they doing (flexion, extension ecc..)?
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With the shoulder flexed at 30°, the moment arm of the deltoid muscle is 2.0 cm. Solve
for the force exerted by the deltoid muscle at the glenohumeral joint give the following
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The deltoid is the only active muscle at the glenohumeral joint
The weight of the humerus is 48 N.
The center of gravity of the humerus is located 30 cm from the shoulder center of
rotation
STATIC EQUILIBRIUM EQUATIONS
CONSIDERING ONLY THE DELTOID MUSCLE
Fo
MA =
18 Cn
COR
B=55".
0-30°
RaF 30 cm
FG = 24 N
Chapter 9 Solutions
BASIC BIOMECHANICS
Ch. 9 - INTRODUCTORY PROBLEMS 1. What regions of the spine...Ch. 9 - INTRODUCTORY PROBLEMS 2. Construct a chart listing...Ch. 9 - INTRODUCTORY PROBLEMS Construct a chart listing...Ch. 9 - INTRODUCTORY PROBLEMS Construct a chart listing...Ch. 9 - INTRODUCTORY PROBLEMS How would trunk movement...Ch. 9 - INTRODUCTORY PROBLEMS What are the postural...Ch. 9 - INTRODUCTORY PROBLEMS Weight training is used in...Ch. 9 - INTRODUCTORY PROBLEMS What exercises strengthen...Ch. 9 - Prob. 9IPCh. 9 - Solve Sample Problem 9.1 using the following data:...
Ch. 9 - Prob. 1APCh. 9 - ADDITIONAL PROBLEMS 2. What exercises should be...Ch. 9 - ADDITIONAL PROBLEMS 3. Compare and contrast the...Ch. 9 - Prob. 4APCh. 9 - Prob. 5APCh. 9 - ADDITIONAL PROBLEMS 6. Formulate a theory...Ch. 9 - Prob. 7APCh. 9 - Prob. 8APCh. 9 - ADDITIONAL PROBLEMS 9. What spinal exercises are...
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