Project #65045 - Musculoskeletal

Question 1 (1 point)

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Begin by making a list of the muscles from the Top 20 that are used in each of this yoga pose. Remember that some of the Top 20 muscles may not be illustrated, but can still be used in these poses; you must include those in your answer.

Once you have made your list, answer the following question:

For each muscle in your Top 20 list, describe its role in the pose. For full credit, your description must include the joint that is affected by each muscle and the action of that muscle on that joint (remember, a muscle action at a joint is the result of the force the muscle applies to the bones on opposite sides of the joint; movement is one possible result of this action).

For example, if the arm is held up parallel to the ground and then horizontally adducted so that it is pointing straight ahead, then the pectoralis major is acting in horizontal adduction and flexion of the glenohumeral joint; the latissimus dorsi is acting in horizontal abduction of the glenohumeral joint to resist adduction; the deltoideusis acting in flexion and abduction of the glenohumeral joint.

The flexors of the GHJ are working against the force of gravity; the horizontal adductors are working to move the GHJ into the pose and to stabilize the joint against the actions of other muscles; and the horizontal abductors are working to stabilize the GHJ against further horizontal adduction.

When in doubt, ask yourself what would happen with the body in that pose if any of the Top 20 muscles were not acting.

 
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Question 2 (1 point)

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Begin by making a list of the muscles from the Top 20 that are used in each of this yoga pose. Remember that some of the Top 20 muscles may not be illustrated, but can still be used in these poses; you must include those in your answer.

Once you have made your list, answer the following question:

For each muscle in your Top 20 list, describe its role in the pose. For full credit, your description must include the joint that is affected by each muscle and the action of that muscle on that joint (remember, a muscle action at a joint is the result of the force the muscle applies to the bones on opposite sides of the joint; movement is one possible result of this action).

For example, if the arm is held up parallel to the ground and then horizontally adducted so that it is pointing straight ahead, then the pectoralis major is acting in horizontal adduction and flexion of the glenohumeral joint; the latissimus dorsi is acting in horizontal abduction of the glenohumeral joint to resist adduction; the deltoideusis acting in flexion and abduction of the glenohumeral joint.

The flexors of the GHJ are working against the force of gravity; the horizontal adductors are working to move the GHJ into the pose and to stabilize the joint against the actions of other muscles; and the horizontal abductors are working to stabilize the GHJ against further horizontal adduction.

When in doubt, ask yourself what would happen with the body in that pose if any of the Top 20 muscles were not acting.

 
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Question 3 (1 point)

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Triceps brachii

Write a complete description of the features of this muscle that affect how it performs its main actions in the body. Pay attention to the muscle's topography or location,its attachments, the locations and shapes of joints affected by it, as well as their planes of movement, the directional orientation of the facicles of body of the muscle as it reaches from the proximal to the distal attachments across the joints, the shape of the muscles, and so on. (Hint: There is an example posted at the bottom of the Top 20 handout.)

 

 
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Question 4 (1 point)

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Rectus abdominis

Write a complete description of the features of this muscle that affect how it performs its main actions in the body. Pay attention to the muscle's topography or location,its attachments, the locations and shapes of joints affected by it, as well as their planes of movement, the directional orientation of the facicles of body of the muscle as it reaches from the proximal to the distal attachments across the joints, the shape of the muscles, and so on. (Hint: There is an example posted at the bottom of the Top 20 handout.)

 
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Question 5 (1 point)

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Supraspinatus

Write a complete description of the features of this muscle that affect how it performs its main actions in the body. Pay attention to the muscle's topography or location,its attachments, the locations and shapes of joints affected by it, as well as their planes of movement, the directional orientation of the facicles of body of the muscle as it reaches from the proximal to the distal attachments across the joints, the shape of the muscles, and so on. (Hint: There is an example posted at the bottom of the Top 20 handout.)

 

 
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Question 6 (1 point)

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Deltoid

Write a complete description of the features of this muscle that affect how it performs its main actions in the body. Pay attention to the muscle's topography or location,its attachments, the locations and shapes of joints affected by it, as well as their planes of movement, the directional orientation of the facicles of body of the muscle as it reaches from the proximal to the distal attachments across the joints, the shape of the muscles, and so on. (Hint: There is an example posted at the bottom of the Top 20 handout.)

 

 
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Question 7 (1 point)

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Gluteus maximus

Write a complete description of the features of this muscle that affect how it performs its main actions in the body. Pay attention to the muscle's topography or location,its attachments, the locations and shapes of joints affected by it, as well as their planes of movement, the directional orientation of the facicles of body of the muscle as it reaches from the proximal to the distal attachments across the joints, the shape of the muscles, and so on. (Hint: There is an example posted at the bottom of the Top 20 handout.)

 

 
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Question 8 (1 point)

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Examine this image of Michelle Kwan right before the “groin” injury that caused her to fall after this landing.

First, identify which leg was injured. Then, describe the positions of the joints in that leg at the time of her landing relative to normal anatomic position. Use the appropriate terms: abduction/adduction, rotation, flexion/anteversion, extension/retroversion, and so on.

What forces were acting on the injured leg and what effects did they have on the positions and movements of the relevant joints?

Based on their abilities to produce or prevent the actions, name the muscles that are likely to be involved in this injury.

Describe all the actions of these muscles in terms of the movement[s] they cause or resist in each of the relevant segments. 

Based on the actions that the various “groin” muscles had to resist and/or perform, identify which one of the medial thigh muscles is most likely to be injured in this sort of landing and relate it to the information that you reported in your answers above.

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Question 9 (1 point)

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For O Louis Guglielmi's painting Relief Blues examine the female figure to the left of center in the foreground.

To solve this problem of anatomic accuracy in figurative painting, start with the basic anatomic landmarks that can provide information about the underlying structures.

  1. First, identify the anatomic landmarks that you can use to locate features of the musculoskeletal system from which we can estimate body proportions.

  2. Compare those proportions that you see to the proportions we expect among anatomic features.

  3. How do the body proportions in the painting compare to the “standard” proportions? Do all the figures in the piece have similar proportions?

  4. What landmarks can you use to help you to gather evidence that you can use to resolve this question?

  5. Does the Guglielmu painting show body proportions that are unrealistic, or would you conclude that he was capturing one example of the normal variation in anatomic form and proportion in the human body?

     

 
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Due By (Pacific Time) 04/03/2015 07:09 pm
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