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Trick Movements (Manual Muscle
Testing)
MANALI DESAI (PT)
Manali S. Desai (PT)
At the end of today’s lecture, you will
understand
What is trick movement?
Types
Examples of each types
Manali S. Desai (PT)
Definition
Unnatural movements seen when muscle is paralysed or inhibited
It is taking over the action of prime mover when paralysed by another group of
muscles
Also known as substitution movement
Manali S. Desai (PT)
Types
Direct / indirect substitution
Accessory insertion
Tendon action
Rebound
Gravity
Manali S. Desai (PT)
Direct / indirect substitution
A) Another prime mover will substitute for paralysed prime mover muscle
Eg: 1) weakness / paralysis of supinator
Muscle substituted Trick movement
biceps will substitute Supination along with elbow flexion
Manali S. Desai (PT)
B) Fixator muscle will produce movement for prime mover / agonist muscle
Eg: hip abductors weak / paralysed
Muscle substituted Trick movement
Lateral abdominals will substitute Pelvis elevation
Manali S. Desai (PT)
C) Other favorable muscle placed in the region, will contract to position the joint in a new
position so that other muscle with respect to new position performs test motion
Eg: If Deltoid paralysed
Favourable muscle New position Other muscle
External rotators Externally rotate Biceps will contract to
produce shoulder
abduction
Manali S. Desai (PT)
D) Other muscle may contract to assist weak muscle
Eg: if biceps weak / paralysed
Muscle substituted Trick movements
Shoulder flexors Shoulder flexes during elbow flexion
Manali S. Desai (PT)
Accessory Insertion
The insertion of muscle is such that when muscle contracts, it helps to perform
movements of the weak paralyzed muscles.
Eg: if EPL paralyzed/ weak
Substituted muscle Insertion Trick movement
APB & FPB Base of proximal phalanx
and extensor expansion
Extension of thumb
Manali S. Desai (PT)
Tendon action
Occurs in two joint muscle or multi joint muscle.
Shortening of a tendon when antagonist muscle contracts strongly.
Eg: if long finger flexors weak/ paralyzed
Trick movement Passive insufficiency Tendon action
Wrist extension Wrist flexors Finger flexion
Manali S. Desai (PT)
Rebound
Phenomenon of seeming contraction in the agonist when the antagonist contracts strongly and
then relaxes quickly.
Eg: if long finger flexors weak/ paralysed
Antagonist contract Trick movement
EPL Finger flexion
Manali S. Desai (PT)
Gravity
Patient will shift the body part so that gravity assists the weak muscles to do the movement
E.g.: If triceps weak / paralysed
Shift the body part Trick movement
shoulder abducted 90 degree Shoulder depression & external rotation
Manali S. Desai (PT)
References
Parry CBW. Trick Movements. Proceedings of the Royal Society of Medicine. 1970;63(7):674-676.
Kendall, F. (2005). Muscles Testing & Function with Posture & Pain ( 5th edition). Lippincott
Williams & Wilkins.
Avers, D. (2019). Daniels & Worthingham’s Muscle Testing, Techniques of Manual Examination &
performance Testing (10th edition). Elsevier.

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Trick movements.pptx

  • 1. Trick Movements (Manual Muscle Testing) MANALI DESAI (PT)
  • 2. Manali S. Desai (PT) At the end of today’s lecture, you will understand What is trick movement? Types Examples of each types
  • 3. Manali S. Desai (PT) Definition Unnatural movements seen when muscle is paralysed or inhibited It is taking over the action of prime mover when paralysed by another group of muscles Also known as substitution movement
  • 4. Manali S. Desai (PT) Types Direct / indirect substitution Accessory insertion Tendon action Rebound Gravity
  • 5. Manali S. Desai (PT) Direct / indirect substitution A) Another prime mover will substitute for paralysed prime mover muscle Eg: 1) weakness / paralysis of supinator Muscle substituted Trick movement biceps will substitute Supination along with elbow flexion
  • 6. Manali S. Desai (PT) B) Fixator muscle will produce movement for prime mover / agonist muscle Eg: hip abductors weak / paralysed Muscle substituted Trick movement Lateral abdominals will substitute Pelvis elevation
  • 7. Manali S. Desai (PT) C) Other favorable muscle placed in the region, will contract to position the joint in a new position so that other muscle with respect to new position performs test motion Eg: If Deltoid paralysed Favourable muscle New position Other muscle External rotators Externally rotate Biceps will contract to produce shoulder abduction
  • 8. Manali S. Desai (PT) D) Other muscle may contract to assist weak muscle Eg: if biceps weak / paralysed Muscle substituted Trick movements Shoulder flexors Shoulder flexes during elbow flexion
  • 9. Manali S. Desai (PT) Accessory Insertion The insertion of muscle is such that when muscle contracts, it helps to perform movements of the weak paralyzed muscles. Eg: if EPL paralyzed/ weak Substituted muscle Insertion Trick movement APB & FPB Base of proximal phalanx and extensor expansion Extension of thumb
  • 10. Manali S. Desai (PT) Tendon action Occurs in two joint muscle or multi joint muscle. Shortening of a tendon when antagonist muscle contracts strongly. Eg: if long finger flexors weak/ paralyzed Trick movement Passive insufficiency Tendon action Wrist extension Wrist flexors Finger flexion
  • 11. Manali S. Desai (PT) Rebound Phenomenon of seeming contraction in the agonist when the antagonist contracts strongly and then relaxes quickly. Eg: if long finger flexors weak/ paralysed Antagonist contract Trick movement EPL Finger flexion
  • 12. Manali S. Desai (PT) Gravity Patient will shift the body part so that gravity assists the weak muscles to do the movement E.g.: If triceps weak / paralysed Shift the body part Trick movement shoulder abducted 90 degree Shoulder depression & external rotation
  • 13. Manali S. Desai (PT) References Parry CBW. Trick Movements. Proceedings of the Royal Society of Medicine. 1970;63(7):674-676. Kendall, F. (2005). Muscles Testing & Function with Posture & Pain ( 5th edition). Lippincott Williams & Wilkins. Avers, D. (2019). Daniels & Worthingham’s Muscle Testing, Techniques of Manual Examination & performance Testing (10th edition). Elsevier.