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Lab 6 prep- upper extremities

by: Bailey Dickinson

Lab 6 prep- upper extremities CBIO 2200 L

Marketplace > University of Georgia > CBIO > CBIO 2200 L > Lab 6 prep upper extremities
Bailey Dickinson
GPA 3.87

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Lab 6 prep
CBIO 2200 L
Class Notes
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This 10 page Class Notes was uploaded by Bailey Dickinson on Saturday September 24, 2016. The Class Notes belongs to CBIO 2200 L at University of Georgia taught by in Fall 2016. Since its upload, it has received 8 views. For similar materials see CBIO 2200 L in CBIO at University of Georgia.


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Date Created: 09/24/16
Muscle 2: Appendicular Muscles of the Pectoral Girdle and Upper Limb Topics Covered Introduction, Specific actions, Naming of muscles, Muscles of the pectoral girdle and upper limb, Muscle action during elbow flexion Introduction As you have probably observed, muscles can work together or in opposition to accomplish a particular movement. Some movements are highly coordinated and rely on the contraction or relaxation of several muscles. The following terms describes muscles in terms of their role in a particular movement: Prime mover- the muscle that has the main force on a joint Synergist- muscles that assist the prime mover, modifies the direction of movement that occurs Antagonist- muscles that oppose (move the bones in the opposite direction) of the prime mover, preventing excessive movement and injury Fixing- to prevent motion in either direction by contraction of prime movers and antagonists at the same time; prevents movement of bone that prime mover is attached to. Remembering the names of muscles can be tedious and daunting. Therefore, try to use tricks to help yourself remember the name of a muscle by asking yourself these questions: • What type of movement is produced (ex. Adduction)? • What region of the body (ex. Posterior; ex. Brachial)? • How many heads? • Where is the origin or insertion? • What direction do the fascicles run? • What shape is the muscle? Muscles of the pectoral girdle and upper limb Muscles that position the pectoral girdle Muscles that move the humerus Muscles that move the forearm Muscles that move the forearm (continued) Muscles that move the wrist, hand, and fingers Muscle Actions during Elbow Flexion Prime mover (agonist)= biceps brachii m. Synergist= brachialis m. Antagonist= triceps brachii m. Fixator= muscle that holds scapula firmly in place such as rhomboideus m.


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