Lab 4: The Appendicular Skeleton (ID Material)

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BIOL252L Shemer Midterm 2
Marissa Alvarez
Flashcards by Marissa Alvarez, updated more than 1 year ago
Marissa Alvarez
Created by Marissa Alvarez over 6 years ago
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Question Answer
What joint is shown below? What type of joint is it and how many planes of movement does it allow? Sternoclavicular joint: a saddle joint allows moderate freedom of movement in two planes. Feel your clavicle move as you shrug your shoulders. Notice how little the sternal end moves.
What joint is shown below? What type of joint is it and how many planes of movement does it allow? Glenohumeral joint: a ball and socket joint like this allows ample freedom of movement (in 3 planes). The socket here (glenoid) is rather shallow but is reinforced by a lip of cartilage and several ligaments. Despite these reinforcements, it is prone to dislocation.
What are the 4 movements of the scapula? Protraction: The scapula is pulled laterally, as when extending the arm for something out of reach. Retraction: The scapula is pulled medially, as when pulling your shoulders back. Elevation: The scapula is moved superiorly, as when shrugging the shoulders. Depression: The scapula is moved inferiorly, as when carrying a heavy suitcase.
What joint is shown? What type of joint is it and how many planes of movement does it allow? Glenohumeral joint: a ball and socket joint like this allows ample freedom of movement (3 planes of movement). Movements of the Humerus The humerus articulates with the glenoid via a ball and socket joint. This type of joint allows the most freedom of movement of any joint.
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