What is involved in the nervous system?
Cranial - eyes mouth ears
Central nerves - brain spinal cord
Autonomic - heart lung, sex organs
Peripheral - arms hands, legs
What is the parasympathetic NS responsible for?
Parasympathetic - tries to calm you down, slows heart rates, breathing - tries to bring you back to homeostasis.
What is the sympathetic NS responsible for?
Sympathetic - allows heart rate to increase, breathing rates, adrenaline. production on insulin. Reaction to the environment
What does the motors neurones do?
Conducts impulses from CNS to effectors
What does the Somatic neurones do?
- Voluntary
- conduct impulses from the CNS to skeletal muscles
What makes up a motor unit
Muscle fibres
Motorneurone
What is a motor neurone composed of?
Dendrites - connect with other neurones
Axon - nerve fibre - pass the signals.
Myelin sheath - like an insulator for the axon to transmit the signal
Nerve endings - connect with muscle or gland
What are the factors affecting global motor unit recruitment?
- Force requirement
- Muscle fatigue
- Energy state of the muscle (ATP and oxygen availability)
- Peripheral motor control stretch reflex
- Muscle energetics and neuromuscular regulation
What prevents your muscle from overextending?
Gorgi tendon
What affects the muscle fibre conductance velocity?
- Discharge rate
- Fibre diameter
- Ion concentration
- pH
- Temperature
- Muscle fibre
When is the muscle fibre conduction velocity high?
With the aid of sodium bicarbonate Signal being conducted at a muscle faster rate.
The larger the diameter of muscle fibre the fast the MFCV. TRUE OR FALSE?
TRUE
The larger the diameter of muscle fibre the fast the MFCV. TRUE OR FALSE?
TRUE
Thicker is faster
Distance is larger but there is a faster speed
Why is the neurone signal faster in MS patients?
Less insulation - less resistant from the Myelin sheath
