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MBLEX Final Exam Prep. Kinesiology Exam And Answers.
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MBLEX Final Exam Prep. KinesiologyExam And Answers.
Phasic Muscles -
\Higher percentage of fast twitch white fibers
Jump into action quickly and tire quickly
Usually weaken in response to postural muscle shortening
Examples of Phasic Muscles -
\Deltoid and Biceps Brachii
Postural Muscles -
\Higher percentage of slow twitch red fibers
Relatively slow to respond
Tend to shorten and increase in tension when under strain
Examples of Postural Muscles -
\Erector Spinae and Soleus
General Muscle Firing Pattern -
\Prime Movers
Stabilizers
Synergists
Synergistic Dominance -
\The dysfunction in which muscles compensate for a weak prime mover to produce the
movement
Reciprocal Inhibition -
\When a tight muscle decreases nervous stimulation to its antagonist causing it to
reduce activity
Flexors, internal rotators and adductors are about ______ to ______ stonger than the
antagonist -
\25-30%
Isometric muscle contraction -
\The length of the muscle does not change
Occurs when someone tried to pick up something that does not move
Isotonic Muscle Contraction -
\The length of the muscle changes
, Eccentric muscle contraction -
\Muscle lengthens
Concentric muscle contraction -
\Muscle shortens
When a jointed area moves into flexion and the joint angle is decreased, the prime
mover and synergist... -
\Concentrically contract
When a jointed area moves into flexion and the joint angle is decreased, the antagonist
eccentrically contracts while... -
\Lengthening
Golgi Tendon Organs -
\Respond to tension and send a signal to the antagonist
Protects the muscle from contracting with too much force and speed
Sends impulses to the central nervous system that lead to muscle relaxation
Muscle spindles -
\Stretch receptors
Respond to sudden and excessive lengthening
Joint Kinesthetic Receptors -
\Found in Joints
Respond to pressure and joint movement
Rotator Cuff Muscles -
\Supraspinatus
Infraspinatus
Teres Minor
Subscapularis
Supraspinatus is... -
\Deep to the trapezius
Infraspinatus is -
\Superficial with a medial portion deep to the trapezius and a lateral portion deep to the
deltoid.
Teres Minor -
\A small muscle high on the axilla
Subscapularis -
\Between the subscapular fossa and serratus anterior
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