Laboratory Manual For Human Anatomy & Physiology
4th Edition
ISBN: 9781260159080
Author: Martin, Terry R., Prentice-craver, Cynthia
Publisher: Mcgraw-hill Education,
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Textbook Question
Chapter 23, Problem 5.2CT
Tendons of the rotator cuff muscles hold the head of the humerus to the glenoid cavity of the scapula. What agonist (prime mover) of arm abduction are these muscles assisting?
Why is their synergistic action important, particularly in sports where there is repetitive throwing or rotation of the arm (e.g., pitching, cricket, swimming)?
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Chapter 23 Solutions
Laboratory Manual For Human Anatomy & Physiology
Ch. 23 - Chest and shoulder muscles that move the arm at...Ch. 23 - Muscles located in the arm that move the forearm...Ch. 23 - Rotator cuff muscles all have origins on the a....Ch. 23 - Which of the following is not a rotator cuff...Ch. 23 - The belly of the muscle is usually ________ the...Ch. 23 - The belly of the flexor digitorumprofundus muscle...Ch. 23 - There are more muscles that move the forearm than...Ch. 23 - The action of the brachialis muscle is flexion of...Ch. 23 - FIGURE 23.7 Label the deep anterior muscles of the...Ch. 23 - Label the muscle of respiration of the posterior...
Ch. 23 - FIGURE 23.9 Identify the posterior muscles of the...Ch. 23 - FIGURE 23.10 Label the anterior muscles of the...Ch. 23 - FIGURE 23.11 Identify the anterior muscles of the...Ch. 23 - Match the muscles in column A with the actions in...Ch. 23 - Name the muscle indicated by the following...Ch. 23 - Name the muscle indicated by the following...Ch. 23 - Name the muscle indicated by the following...Ch. 23 - Name the muscle indicated by the following...Ch. 23 - Name the muscle indicated by the following...Ch. 23 - Name the muscle indicated by the following...Ch. 23 - Name the muscle indicated by the following...Ch. 23 - Name the muscle indicated by the following...Ch. 23 - Identify the muscles indicated in figure 23.12....Ch. 23 - Tendons of the rotator cuff muscles hold the head...
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- * These muscles (and subscapularis) form the rotator cuff which is a critical stabilizing element for the glenohumeral joint (shoulder joint). Thus, one action for each of these muscles is to stabilize the shoulder joint. Examine the rotator cuff muscles in the cadaver and see if you can determine where the tendons incompletely surround the head of the humerus. What clinical significance does this have?arrow_forwardDuring shoulder abduction what movement occurs at the scapulothoracic joint and what muscles contribute to this?arrow_forwarddescribe scapulohumeral movement, or synergy, that takes place with the shoulder joint and girdle. What muscles are acting to create these motions? What could happen if this synergy did not occur?arrow_forward
- After throwing a baseball pitch, which muscles of the glenohumeral joint work to slow the motion of the shoulder? Consider one of flexor, internal rotator, external rotator or adductor.arrow_forwardWhat are the four muscles that originate on the medial epicondyle? Be specific. How many degrees of freedom does the humeral ulnar joint have? Resisting what two combined motions makes the flexor carpi ulnaris most active?arrow_forwardWhat muscles are most important to the phalangeal flexor mechanism?arrow_forward
- What are two factors which allow the gastrocnemius and soleus muscles to generate greater plantar flexion torque than all the other muscles capable of plantarflexion?arrow_forwardYou are helping an individual retrieve a very heavy box off of a high shelf. You have to fully flex your shoulder in order to get this box and then you will extend the shoulder back to anatomical position to place the box safely where it needs to be. 1. What are all the muscles responsible for the first movement of flexion to get the box? 2. What are all the muscles responsible for the second movement of extension to safely place the box where it needs to be?arrow_forwardName a muscle that inserts on the scapula and plays a significant role in each of the following actions:a. pushing a stalled car,b. paddling a canoe,c. squaring the shoulders in military attention,d. lifting the shoulder to carry a heavy box on it, ande. lowering the shoulder to lift a suitcase.arrow_forward
- To do Right ankle plantar flexion in the Sagittal plane, the (name the muscle) would have to lie (A – Where?) relative to the joint, and since it can only (PULL), the fibers would have to run (PERPENDICULAR ) to the (D ) axis to achieve the desired movement. choose from: A. Pick from: Anterior, Posterior, Medial, Lateral, Superior, Inferior B. Write in the word “PULL” C. Write “perpendicular” D. Pick from :Anterior - posterior, Superior-inferior or Medio - Lateralarrow_forwardWhy do you suppose there are more and larger muscles involved in plantar flexion of the foot than dorsiflexion?arrow_forwardWhich of the following muscle originates on the humerus and insert at the distal end of the radius Brachialis Biceps brachii Brachioradialis deltoid Which of the following muscle is deep to the iliotibial band? Gluteus maximus Vastus medialis Vastus lateralis soleus The head pf the fibula is a site of origin for which of the following muscle Peroneus longus Tibialis posterior Peroneus brevis Flexor hallucis longusarrow_forward
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