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Chapter

PEDS100 Chapter Notes -Flexor Carpi Radialis Muscle, Transverse Abdominal Muscle, Brachialis Muscle


Department
Physical Education and Sport
Course Code
PEDS100
Professor
Gail Amort- Larson

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Myology
skeletal muscles attach to bone(directly or indirectly, skin or fascia)
-most muscles connect to bone, fascia is connective tissue
Skeletal muscles:
-produce skeletal movement
-maintain posture and body position
-support soft tissues
-Regulate entering and exiting of material
-Maintain body temperature(muscles generate heat)
Origin: Remains stationary (usually)
Insertion: Moves (usually)
Commonly the origin is proximal to the insertion
Muscles can be grouped according to their primary actions into 3 types:
Prime Movers (Agonists): are chiefly responsible for producing a particular
movement
Synergists: assist the prime mover in performing an action
-If a synergist stabilizes the origin of the agonist it is called a fixator
-synergists can work with agonists to perform actions that neither can do alone
-usually most useful at start of a movement when prime mover is stretched and
has low power
Antagonists: are muscles whose actions oppose that of the agonist:
-If the agonist produces flexion, the antagonist will produce extension
Naming of Skeletal Muscles
Specific body regions:
-Brachialis
Shape of Muscle:
-Trapezius
Orientation of Muscle fibers:
-Rectus(straight), transversus(across longitudinal axis), oblique(at an oblique
angle across longitudinal axis)
Specific or unusual features:
-Biceps (2 origins)
Identification of origin and insertion:
-Sternocleidomastoid
Primary functions:
-flexor carpi radialis
References to actions:
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