Balance Flashcards
Define the central set
Readiness of the CNS for an upcoming event based on initial conditions, prior experiences and expectations
Name the different systems controlling balance
Visual
Vestibular
Proprioceptive
When the head moves in one direction, the eyes follow. True of False
False
Which reflex is used to stabilise the head position in relation to trunk?
Cervico-collic reflex
Which reflex is used to stabilise the image on the retina when the head rotates?
Vestibule occular reflex
Define sensory reweighting
Ability to reweight sensory information depending on the sensory context is important for maintaining stability when moving from one context to another
In which situation the Base of Support is the smallest
A- On the tip of the toes
B- 4 legged position
C- Feet next to each other
D- Feet spread larger of hip
A- On the tip of the toes
Which of the system is primarily involved when standing in an upright position?
A- Vestibular
B- Visual
C- Auditory
D- Proprioceptive
D- Proprioceptive
What is the difference between vestibulo-collic and cervico-collic reflex?
Vestibulo-collic and cervico-collic reflexes closely interact together for the vestibular control of the head orientation in space
Vestibulo-collic stabilise the head position in relation to the gravity vector
Cervico-collic: stabilise head position in relation to trunk
Which part of the vestibular system is specifically involved in the vestibulocollic reflex?
Semi-circular canals
Which part of the visual system is involved in maintaining balance?
Retina
Usually during sensory reweighting during movements, which system gets less involved?
Proprioceptive
Which structure of the vestibular system detects horizontal linear accelaration?
Utricule
Which structure of the vestibular system detects vertical accelaration?
Saccule
Explain the vestibulocollic reflex
Signals detected by the semicircular canals are conveyed to neck motoneurons with the intervention of 1 interneuron on the vestibulocollic neuron (VN) and will evoke the vestibulocollic reflex (VCR)
Which of the following is not a strategy to counteract a fall?
A- Hip strategy
B- Ankle strategy
C- Stepping strategy
D- Knee strategy
D- Knee strategy
Which of the following is not correct for the ankle strategy?
A- The perturbation is fast
B- Muscles are recruited distal to proximal
C- The contact surface is firm and wide
D- Head is in phase with hip
A- The perturbation is fast
Which of the following is not correct for the hip strategy?
A- The perturbation is fast
B- Muscles are recruited distal to proximal
C- Head is out of phase with hip
D- The contact surface is unstable
B- Muscles are recruited distal to proximal
The reaching strategy is slower that the stepping strategy. True or False
False
Which system is not a component controlling balance?
A- Visual
B- Auditory
C- Vestibular
D- Proprioceptive
B- Auditory
The vestibulocollic reflex involves neck motoneurons and semicircular canals. True or False
True
