PNF Flashcards
What is PNF?
A motor learning approach used to improve motor function and facilitate maximal muscular contraction.
What does PNF stand for?
Proprioception: Knowing where your body and limbs are in space. Objective: make pt aware (and teach most efficient) of movement and posture.
PNF is based on proprioceptive(muscle spindles, GTO) and sensory inputs (cutaneous receptors).
Neuromuscular: Neurological and musculoskeletal system interaction: difficulties with posture and movement. Evaluate and treat problems w/ movement dysfunction and postural instability.
Facilitation: Assisting and/or promoting an improved patient movement response or posture.
What is the main goal of PNF?
Facilitate a patient in achieving a movement or posture.
What is the cycle of how PNF can be used?
- Assess movement or posture.
- Carry out PNF treatment.
- Reassess
What is the background of PNF?
Types of PNF?
Possible mechanism?
1900: Concepts of neuromuscular facilitation and inhibition.
Kabat: Clinical PNF stretching techniques.
Types: contract relax, hold relax, agonist contraction, hold relax agonist contract….
Autogenic Inhibition Reciprocal Inhibition Passive properties of the musculoskeletal unit. Muscle properties Stretch perception. Stretch Reflex
What is the theoretical basis for PNF? 3 Mechanism?
- Proprioceptive stimulation: strengthening and relaxation.
- Voluntary muscle contractions performed with muscle stretching: reflexive components of muscular contraction, promote muscular relaxation, increase joint rom.
- Stretch Reflex:
Autogenic inhibition, reciprocal inhibition, EMG activity.
Is there good evidence for PNF?
Not really. PNF compared to conventional PT does not show a significant effect because it is hard to isolate PNF from other techniques.
What are the basic principles of PNF? (Two cards about this)
Body position: PT and pt positioning for safety and comfort.
Manual contacts: Use of hands to guide movement and provide resistance
Body Mechanics: For safety and efficiency
Quick Stretch: Apply to exploit physiological properties of the ms to facilitate movement
Verbal command: To elicit a greater movement
Visual Stimuli: Reach towards a target
Appropriate resistance: Apply resistance to guide patient, apply resistance to the appropriate level of the patient you are treating.
What are the two PNF techniques we need to know for this course?
What are they used for?
Rhythmic initiation:
1) Passive, VC: Relax, let me move you
2) Active assisted, VC: Help me a little (MC need to be precise)
3) Resisted, VC: Push into my hand (MC need to be precise)
Used to:
- Help the patient relax (passive)
- Help initiate the movement
- Help teach or make the patient aware of the direction of movement
- Help achieve a better quality movement
Combination of Contractions:
Concentric contraction followed by isometric at the end then eccentric contraction back to starting position.
Used to:
- Increase ROM
- Achieve a more coordinated and fluid movement
What functional rehab goals can PNF be used for?
Transfers and Mobility:
- Rolling
- Lying to sitting
- Gain initiation
In neuro we have lower level patient for whom these functional mobility tasks are a primary goal.
What are the PNF patterns for this lab?
Anterior Elevation of the Scapula Posterior Depression of the scapula Anterior Elevation of the Pelvis Posterior Depression of the Pelvis Anterior Depression of the Scapula
What are 4 key concepts of PNF?
- Coordination of mvmt between trunk and extremities.
- Resistance applied in a precise diagonal=stronger response and better coordination. Greatest arc of movement for the range that the patient has allows for activation of most of the muscles.
- To facilitate a better response by applying a quick stretch in the diagonal.
- Each pattern of movement is composed of 3 directions:
Flexion or Extension+Abduction or Adduction+Internal or Extneral rotation
Patterns of movement can be used to assess and treat dysfunction.
What are important anatomical feature to consider for PNF?
The concave structure of the scapula slides over the rib cage. With a diagonal arc of movement we are trying to achieve movement of the scapula over the shape of the rib cage.
In what position should patients be placed for PNF techniques for AE and PD of scapula and pelvis?
- Support limbs with a pillow
- Neutral spine position
- Head and neck position
- Ensure pt comfort.
Anterior Elevation of the Scapula:
- UE Pattern.
- Why would we want to work on PNF for AE?
- Flexion-Adduction-External Rotation
- A. Stability: you need stability of the scapula in AE to carry out overhead activities.
B. Mobility: You need mobility in the direction of scapular AE to bring the arm overhead towards Flex-Add-ER.
C. Functional Actives: You need the combination of mobility and stability to effectively carry our functional activities: Reach for objects overhead, place objects on shelf, comb hair, put seat belt, to roll form sidelying to prone.
How do you carry out AE of the scapula?
- MC
- Direction of Elongation (DE)
- Verbal Command
MC: Anterior and superior aspect of the shoulder.
DE: Towards PD of the scapula
VC: Pull Up
What muscles are working during AE?
- Scalenes
- Upper fibers of Serrates Anterior
- Upper traps
Posterior Depression of the Scapula:
- UE Pattern
- Why would we want to work on PNF for PD?
- Extension, Abduction, Internal Rotation
- Posture: more efficient posture, more stable upper trunk, contributes to better neck and UE ROM.
Stability: More stable lower trunk (b/c Upper trunk is more stable in scapular PD), less stress in lower back when doing certain activities (lifting) b/c of more stable trunk.
Mobility: You need to have good ROM in the direction of PD of the scapula to be able to do activities that require the UE to be in Ext-Abd-IR.
Function: Need a combination of mobility and stability to efficiently carry out functional activities: Transfers, walking w/ assistive devices, got from sit-to-stand using an armrest.
Reduction of Tone: Scapular PD may help to decrease UE tone
Ambulation: Scapular AE and PD contribute to good trunk movement and efficient arm swing during gait.
How do you carry out PD of the scapula?
- MC
- Direction of Elongation (DE)
- Verbal Command
MC: 1 hand Inf. Angle of the Scapula. Other hand: posterior surface of the scapula and humerus.
DE: Towards AE of the scapula.
VC: Push Down
What muscles are working during PD?
- Lat Dorsi
- Rhomboids
- Inf. Fibers of Serrates Anterior.