Functional stability Flashcards
Interplay between Dynamic structures and Static structures:
Static Factors
* Bony congruity, ligamentous structures, interosseous structures, syndesmotic structures, joint capsule
Dynamic structures
* Muscular control, joint proprioception, feedback (visual, balance, proprioception)
Neuroplasticity
- Changes in the functional, chemical and structural properties of primary sensory neurons, neurons in the dorsal horn and brain are responsible for dynamic switching in states of the somatosensory system.
In other words, the body’s ability to do things is dependent on sensory feedback from the environment around and inside of us.
Why is Neuroplasticity essential
Essential aspect of state dependency of sensory perception.
In other words, we need a healthy well-functioning sensory system to keep relaying back information to the brain.
Context principle:
Every action has a context: Within the outside environment, within what you’re doing, which part of your body you’re using and what joints are in the part of the body.
Motor complexity model:
- Parametric abilities – how much effort do you have to put in
- Synergetic abilities – One muscle contracts as the other relaxes
- Composite abilities
- Skill – How good is the technique
All come together for you to execute an efficient competent motor skill.
How the body simplifies Reflex arcs
: Body allocates certain decisions to a particular level in the spinal cord to take some workload of the brain. Serious injuries to the spinal cord e.g. spondylolisthesis or whiplash can have a big impact.
Concept of functional stability
Every joint in the body has its own stabilising mechanisms to maintain healthy weight movement.
Good example is the rotator cuff of the shoulder girdle.
Rotator cuff of the shoulder girdle functional stability example
- GH is very shallow very small ball and socket joint (vulnerability) , to allow for so much movement, ligaments and capsule must be quite loose
- To give it stability the 4 muscles combine to hold the head of the humorous back onto the scapular and thorax
- Also helped by the biceps – anteriorly hold the head of the humorous and keep it stable as you’re going into abduction.
Core stability concept
The capacity of the muscles of the torso to assist in the maintenance of good posture, balance, etc., especially during movement.
In order to move safely you need all core muscles to contract and maintain a certain internal pressure within the trunk. This stabilises the Lsp and keeps it safe while you’re moving.
Key muscles to core stability
- Thoracic diaphragm
- Transversus
- Multifidis
- Pelvic floor
- Internal/external obliques
- Rectus abdominalis
Supporting structures to core stability
- Thoraco lumbar fascia
- Linea Alba
- Semi lunaris
Concept of antagonist Vs agonist
- Too basic way of looking at muscular contraction
- Very all or nothing way of looking at it, contraction works much more in a graded way with gradual contractions, with muscle groups working in a team
- Works but needs to be a lot more subtle.
- Movers’ vs stabilisers another way to look at it
- Synergist – the assister
Cervical stability
- If the head is in line with the lateral plumb line its functional weight is 12lbs
- The more the head is pushed Infront of the LOG the more its functional weight is
- The higher the pressure on the anterior muscles of the Csp
- This also stretches the blood supplies and nerves to the neck– causing headaches
- Decreases lumbar lordosis and stretches the hamstrings
Myofascial chain concept
- The anatomy of connection, liking of fascial system with the muscular system.
Fascial follows lines/chains:
1. Superior front line – follows down the cervical fascia, thorax, Linea alba and then disperses and comes down the anterior legs
2. Lateral line – Criss crossing line that goes down the side of us
3. Deep back arm line – posterior hand, through the triceps, infraspinatus and rhomboids.
4. The spiral line – crosses the midline and lateral line in a double helix fashion
Bio-tensegrity
Considers the relationship between every part of an organism and the mechanical system that integrates them into a complete functional unit. It is a simple re-evaluation of anatomy as a network of structures under tension and others that are compressed, parts that pull things together and others that keep them apart, basic physics.
