PNF quiz

Question 1

PNF definition

Answer 1

system of exercise used to influence proprioceptors to influence motor output

Question 2

purpose of PNF (and some buzz words) and what we are trying to tap into

Answer 2

increase functional carry over- restore spiral, reciprocal, dynamic diagonal movements
“tapping into pts untapped potential”

Question 3

irradiation
def
how we use it

Answer 3

def: overflow

we use it by keeping resistance => other MU are recruited

Question 4

successive induction def

Answer 4

once a contraction starts the next contraction or the reciprocal contraction are easier to recruit

agonist working => antagonist working better

Question 5

reciprocal innervation/ inhibition def

Answer 5

during contraction, antagonist has to relax

Question 6

4 types of muscle contractions and describe them

Answer 6

isotonic:

1. concentric = shortening
2. eccentric = lengthening
3. maintained isotonic*= blocked isotonic tell the pt to keep pushing against resistance and when u remove resistance, movement occurs

isometric = stabilizing contraction, no change in length

Question 7

9 basic techniques of PNF

Answer 7

1. body position and body mechanics (of PT and pt)
2. manual contacts
3. appropriate resistance
4. verbal commands
5. stretch
6. traction or approximation
7. vision
8. timing
9. pattern

Question 8

what does appropriate resistance do for us?

Answer 8

helps bring in muscle spindle

Question 9

stretch helps 3 things…
must be accompanied by… to make it effective (2)
taps into…

Answer 9

1. initiate movement
2. redirect movement
3. sustain movement*

must be accompanied by:
verbal command (timing) 
followed by resisting the movement we want them to do

taps into monosynaptic myotatic reflex (alpha motorneuron)

Question 10

when do we do traction vs. approximation?

what is their purpose?

Answer 10

traction: usually done during movement, helps increase movement
approximation: done before movement, done for stability

Question 11

2 types of timing

and how we do them (3)

Answer 11

1. normal
2. timing for emphasis => maintained isotonic
   block stronger movement to facilitate weaker components of a movement
   block part of movement and continue other movement. irridation occurs
   can be distal -> prox or prox -> distal

Question 12

3 examples of how does vision help?

Answer 12

increases movement
increases wt shifting
increases trunk rotation

Question 13

goal of special techniques

Answer 13

smooth and coordinated movement with normal postural control.
aka task specific training with optimal posture

Question 14

rhythmic initiation
movement pattern (3)
purpose (4)

Answer 14

PROM -> AAROM -> appropriate resistance

purpose:

1. evaluate arc of motion, tone and patients ability to complete arc
2. give pt sense of movement
3. relax pt
4. muscle re-education => successive induction

Question 15

isotonic reversals = dynamic reversals
movement pattern
purpose (5)

Answer 15

reciprocal pattern
isotonic contractions thru entire arc with appropriate resistance; can do maintained isotonic or isometric at any point in range
can use quick stretch as needed

purpose:

1. facilitate coordinated, reciprocal movement
2. improve smooth reversal of movement direction
3. facilitate agonist/antagonist pairs
4. prevent/relieve fatigue (increase endurance)
5. increase AROM

Question 16

combination of isotonics movement pattern
when do i do these?
purpose (2)

Answer 16

use eccentric, concentric and maintained isotonic in 1 direction of given diagonal

• maintained isotonic is used when there is a weakness in arc of movement, allows MU recruitment
• at strong part give resistance do these at various parts of movement for small arcs

purpose

1. mimic ADL
2. train pt to transition among types of contractions

Question 17

when are maintained isotonics used?

why?

Answer 17

weak point in the range, this allows time for full MU recruitment

Question 18

rhythmic stabilization = isometric reversals
characterization
goals (4)
indications (5)

Answer 18

characterization: resisting isometric contractions (dont let me move u)

goals:

1. increase A & PROM
2. increase strength
3. increase stability & balance
4. decrease pain

indications:

1. limited ROM
2. weakness in antagonist muscle group
3. decreased balance
4. pain when motion is attempted
5. joint instability

Question 19

rhythmic stabilization technique (5)

Answer 19

1. resist isometric contraction of agonistic muscle group
2. resistance increased as pt builds matching force
3. when pt is fully responding, therapist moves hand and begins resisting antagonistic motion at distal part
4. new resistance builds up slowly, then therapist goes to new antagonist resistance
5. use traction and approximation as needed