MBLEX Final Exam Prep. Kinesiology|
121 Questions and Questions A+
Graded
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
- Hip Flexors - -Rectus Femoris
Gluteus Medius
Gluteus minimus
Adductor Longus
Adductor Brevis
Pectineus
Tensor Fascia Latae
Psoas Major
Iliacus
- Hamstrings - -Biceps Femoris
Semitendonosis
Semimembranosis
Responsible for FLEXING THE KNEE
- Quadriceps - -Rectus Femoris
Vastus Lateralis
Vastus Medialis
Vastus Intermedius
121 Questions and Questions A+
Graded
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
- Hip Flexors - -Rectus Femoris
Gluteus Medius
Gluteus minimus
Adductor Longus
Adductor Brevis
Pectineus
Tensor Fascia Latae
Psoas Major
Iliacus
- Hamstrings - -Biceps Femoris
Semitendonosis
Semimembranosis
Responsible for FLEXING THE KNEE
- Quadriceps - -Rectus Femoris
Vastus Lateralis
Vastus Medialis
Vastus Intermedius
